ZETOR This operator s manual will help you to become familiar with the operation and maintenance of your new tractor. In spite of fact that many of

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3 ZETOR This operator s manual will help you to become familiar with the operation and maintenance of your new tractor. In spite of fact that many of you have reach experiences with operation of various tractors, please, read carefully all safety rules and operating instructions in this operator s manual before attempting to operate the tractor. You will find a lot of new information and receive a perfect overview how to use the tractor with highest efficiency at various operations. Your new Zetor tractor will be your reliable friend if observing the mentioned safety rules, tractor maintenance and safe operation Manufacturer of Your tractor wishes you thousands of satisfactorily worked hours. ZETOR Brno 3

4 Information about technical specifications, design, equipment, material, and external appearance is valid in the time of printing this operator s manual. Manufacturer reserves all rights for changes. 4

5 5 CONTENTS Page Location of serial numbers... 9 Safety instructions for user Preventive daily service Acquintance with tractor Electronic engine governor Operation Tractor running in...83 Transportation...91 Driving the agricultural machines Hydraulic system Electro-hydraulic Hitches Wheel tread setting Balast weights Maintenance instructions Adjustment Electrical installation Planned technical maintenance Main technical parameters The operator s manual contains description, operation and maintenance of standard and optional tractor equipment. Service checkbook isn t a part of operator s manual. This is the separate booklet that is passed to you when purchasing new tractor.

6 6 Zetor 8621 Forterra turbo - 60 kw Zetor 9621 Forterra turbo - 67,5 kw ZETOR 8621, 9621 FORTERRA TURBO F 1

7 7 Zetor 8641 Forterra turbo - 60 kw Zetor 9641 Forterra turbo - 67,5 kw Zetor Forterra turbo - 76 kw ZETOR 8641, 9641, FORTERRA TURBO F 2

8 8 Zetor Forterra - 81 kw ZETOR FORTERRA F 3

9 9 LOCATION OF SERIAL NUMBERS Z Z FORTERRA TURBO F 4

10 10 LOCATION OF SERIAL NUMBERS Z FORTERRA F 5

11 11 LOCATION OF SERIAL NUMBERS Whenever you contact your authorized service dealer or the factory for order of service parts, always know the model and serial numbers of your tractor. For your convenience, write those numbers in the frames below. Tractor model Tractor serial number Engine serial number ZETOR 8621, 8641, 9621, 9641, ZETOR The left, right, front and back side of the tractor is determined by traveling direction. Manufacturer reserves rights for changes of design and option, that improve the tractor features. F 6

12 Keep extreme attention when reading parts of operator s manual that are marked by these symbols. You will find this symbol at all important warnings identifying the safety of tractor operation. Keep these safety massages and however regardless of the hazard, be extremely careful! Inform your cooperators and other users about these messages. This symbol marks all chapters speaking about different operation, maintenance, adjustment and safety rules at tractors Z 11641Forterra. Study carefully chapters marked by this symbol before starting with operating, servicing or adjusting the tractor. You will find this symbol whenever important informations on operation, adjustment and repairs of starter motor. Keep these regulations and be extremely careful in these cases! SAFETY INSTRUCTIONS FOR USERS This symbol marks such tractor equipment that is not assembled as a standard (optionally assembled equipment only). GENERAL SAFETY REGULATIONS 1. Only a trained operator having a valid driving license and being properly acquainted with operating and safety rules can operate the tractor. 2. Except of safety warnings mentioned in this operator s manual you must respect all general safety and traffic regulations of country where the tractor works. PROPER CLOTHING 3. Don t wear loose clothing and free flying long hair at operation. 4. Use suitable (prescribed) personal protection means (working boots, gloves etc.) at work. STARTING ENGINE 5. Starting the engine when driving tractor downhill is forbidden. 6. Starting tractor by means of towing with another tractor or vehicle is allowed only when the pull bar is used. 7. Tractor Z can not be started without battery, with discharged battery or without external source (see electronic governor of injection pump) Start the tractor from driver s seat only with shifting lever in neutral position. Life hazard when starting by starter connector short circuit. 8. The key of the key switch must be in position "I". 9. When preheating engine by electrical heater, plug the heater first and connect the cable into electricity after. After preheating disconnect the cable from electricity first. WARNING! Electrical shock hazard OPERATION 11. Hoses of hydrostatic steering, brakes and fuel system must be checked and replaced in case of any damage indication. The damage indication is for example: cracks on hose surface, loosening of hose fittings (verify it by pulling of hose from fitting) and mechanical damage of hose. 12. Brakes and steering must be permanently in perfect condition. 13. Brake pedals must be latched at transportation with trailers and implements on the road. 14. Driving downhill without shifted gear is forbidden!

13 15. Pay special attention when driving on hilly, muddy, sandy, icy and uneven terrain. 16. Don t exceed the max. specified inclination angle 12 0 for 4WD tractors (respectively 11 0 for 2WD tractors). 17. Don t exceed the max. total weight of trailers mentioned in the tractor serial number plate or rear fender label. 18. Don t use the differential lock when driving into the turning. 19. Never get out or into the driving tractor. This is forbidden. 20. Reduce the travel speed to 20 km/h when transporting agricultural implements hitched in the front three point hitch. 21. The front axle load must not be lower than 18 to 20 % of immediate total tractor weight when transporting agricultural implements hitched in the rear three point hitch. TRANSPORTATION OF PERSONS, OPERATION 22. Number of persons transported by tractor must not exceed number mentioned in tractor technical license. 23. Persons, unauthorized to work with attached implement, must not stand between tractor and hitched implement (machine). SAFETY INSTRUCTIONS FOR USERS 24. Make sure neither any person nor any obstacle allows driving before starting tractor move. 25. Max. allowed travel speed of tractor and trailer equipped with one hose air trailer brakes is 25 km/h. 26. Don t exceed the max. specified inclination angle 11 0 for tractors Z 8621 and Z 9621 and 12 0 for tractors Z 8641, Z 9641, Z 10641, Z RELEASING AND PUSHING TRACTOR 27. Use a pull bar or a rope for releasing an immobilized tractor. Never use chains. It is life dangerous to stand near the rope when releasing the tractor 28. Front hook assembled on front tractor frame serves for pulling the alone tractor only, i.e. without trailer or another implement. 29. Never use free wooden blocks, planks or bars put between tractor and pushed subject when pushing other vehicles (trailers, wagons etc.). LEAVING TRACTOR 30. Do not park the tractor with attached implement in lifted position. 31. Don t forget to brake the tractor with parking brake (shift the gear) remove the key from key switch and lock the cab before leaving tractor. 32. Shift the reverse lever into forward position Brake the tractor with parking brake before leaving tractor with running engine. 34. Usually use the left-hand side of tractor- left door when leaving tractor. Look round if any vehicle coming, that could jeopardize your safety when leaving and open the door. 35. Use steps and handles when leaving the tractor. When leaving tractor by the right door pay attention being in space of shifting levers and hand throttle control. AT STOPPED ENGINE ONLY 36. All activities like refueling cleaning, lubricating and adjusting tractor or attached implement can be done at stopped engine and stopped moving tractor parts only, except of brake, hydraulics and charging function inspection. 37. It is necessary to stop the engine before removing bonnet side shields. The engine can run in closed room and house only when the perfect ventilation works. Exhaust gases are health dangerous.

14 14 FIRE PREVENTION RULES 38. Refuel the tractor after finishing the job and with stopped engine. 39. Don t refuel the fuel tank up to the top in summer season. Wipe the fuel immediately when spilled. 40. Don t refuel the tractor nearby an open flame. Don t smoke. 41. Don t smoke and don t use an open flame when inspecting the battery electrolyte level. 42. Keep properly the fire prevention regulations in areas with increased fire hazard (hay-lofts, straw-stocks etc.). 43. If the tractor is equipped with a fire extinguisher keep it ready for use. 44. Use the spark arrestor when working in fire hazard environment. HEALTH AND ENVIRONMENT PRO- TECTION 45. Tractors are not equipped with special ventilation filters of inlet air coming to the cab. That s why tractors are not intended for work with aerosols and other substances harmful to health. Kerosene, diesel fuel, mineral oils and other products from crude oil used for operation and maintenance of tractor may cause an injury in case of direct contact with skin and it can irritate mocous membranes, eyes, digestive or SAFETY INSTRUCTIONS FOR USERS respiratory organs. Some of them might cause the total poisoning when used. 46. Persons working with crude oil products must properly keep safety and hygienic regulations, they must use the suitable protectors and work in properly ventilated areas. WORKING WITH CRUDE OIL PRO- DUCTS 47. Wash properly your hands with mild detergent and treat them with suitable skin ointment or cream after finishing work or before eating. 48. Remove oil drops from quick-couplers (from male and female) by textile material after disconnecting or connecting hydraulic circuit. PREVENTIVE DAILY SERVICE 49. Do this service every day or at least every 10 hours. SAFETY CAB 50. If corrosion or accident damages the frame of safety cab it is necessary to exchange the cab. AIRCONDITIONING 51. In any case do not disassemble, turn or manipulate with fittings of AC system. This might create a sudden escape of fluid and local freeze. This could create a serious damage of tissue when touching or when frozen in hands.

15 15 PREVENTIVE DAILY SERVICE Do this service every day or at least every 10 hours F 7

16 16 PREVENTIVE DAILY SERVICE FUEL SYSTEM LEAKAGE Inspect the fuel system for leakage including the fuel tank. Repair immediately any leaks. F 8 F 9 F 10 ENGINE OIL LEVEL Check the engine oil and inspect the lubrication system for leakage. Add the oil to prescribed level. COOLING SYSTEM Inspect the engine cooling system for leaks. Check the coolant level in the expansion tank. Add the coolant to "MAX level. The minimum allowed level is on the lower mark.

17 17 PREVENTIVE DAILY SERVICE FLUID SERVICE BRAKES Inspect the brake and clutch circuit for leaks and check the brake fluid level in the brake fluid expansion reservoir. F 11 F 12 F 13 AIR TRAILER BRAKES Inspect the air brake system leak and tractor break efficiency with trailer (see inspection of air brake leak ). HYDRAULIC TRAILER BRAKES Inspect the hydraulic brake system leak.

18 18 PREVENTIVE DAILY SERVICE STEERING Check oil level in the hydrostatic steering oil tank. Retighten bolts and nuts of steering tie-rods and arms. F 14 F 15 F 16 TIRES AND WHEELS Check the inflation air pressure of front and rear tires. Inflate them up to the recommended pressure according to operating conditions. Check, eventually retighten bolts of front and rear wheels. Never drive tractor with loosened bolts of wheels. AIR CLEANER The indicator indicates clogging of the air cleaner, this indicator switches the lamp on the dashboard in case of strong clogging.

19 19 PREVENTIVE DAILY SERVICE CAB FILTRATION Check and eventually clean cab filters located under the roof in front part. Filter exchange interval depends upon dustiness of working condition. The partial regeneration of filters can be done by shaking-out or blowing by press air. Filters are accessible after removing of grills located in front of cab roof. F 17 F 18 F 19 HITCHES Check the status of hitches and attachments including the trailer. AFTER OPERATION WITH FRONT IMPLEMENTS Remove the front mask to be able to blow out impurities outside the tractor. Clean the front part of radiators (radiators of transmission, AC condenser) by the press air, blow it in direction from the engine. Remove the rest of impurities under the bonnet, otherwise their repeated suction into the cooling system might appear.inspect front three-point hitch hydraulic circuit for leaks.

20 20 PREVENTIVE DAILY SERVICE F 20 SHORT FUNCTIONAL TEST Check the lubrication indicator light is off after starting engine. Check the function of charging (charging control lamp must be off). Check the hydraulic circuit of hydrostatic steering for leaks and its function.

21 Tractor user must be properly acquainted with recommended operating and safety rules in advance. It is too late to do it within operation! ACQUAINTANCE WITH TRACTOR Page Safety cab Opening the door from outside Opening the door from inside Rear window...24 Side window...24 Tiltable roof lid...24 Opening for implementation purposes...25 Windshield washer...25 Washer tank...25 Washer control...25 Passengerřs seat...26 Space for driverřs needs and toolbox...26 Rearview mirrors...26 Seat adjustment for driverřs weight...27 Longitudinal seat adjustment Vertical seat adjustment Driverřs seat Grammer Seat adjustment for driverřs weight...28 Longitudinal seat adjustment Driverřs seat Cobo...29 Seat adjustment for driverřs weight...29 Longitudinal seat adjustment and backrest adjustment...29 Tiltable steering wheel Angle adjustment...30 Telescopic adjustment Control panel of heating, airconditioning and radio...31 Four-speed switch of heating blowers...31 Control panel on right cab pillar...31 Ventilation outlets and radio speakers...32 Defrosting the front windshield Ac control...33 Cooling the cab

22 22 ACQUAINTANCE WITH TRACTOR Ac operation Location of dashboard Description of instruments Indicator lights Location of dashboard Description of instruments Indicator lights and push buttons Switches with levers Light switch (a) Front wheel drive switch (d) Hazard light switch (f) Switch of grill and cab headlight (g) Switch of rear (front) differential lock (j) Turn signal, headlight and horn toggle switch (i) Key switch Key in "0" position Key in "I" position Key in II position Throttle control lever Stopping device Electronic hand throttle control Pedals and levers Main gear shifting lever and reversor lever Shifting lever of road speed and reduced speed PTO selection control lever for shifting of pto independent and ground speed Parking brake lever and pick up hitch control lever Hydraulic control Hand control of selection control valve Fuel tank Draining plug of fuel tank Average fuel consumption in litters per operating hour Battery switch Location of information and safety decals... 48

23 23 SAFETY CAB SAFETY CAB Use steps and handles when getting out and in. F 21 F 22 F 23 OPENING THE DOOR FROM OUTSIDE Cab doors can be locked from outside. OPENING THE DOOR FROM INSIDE 1. Lever for opening from inside. 2. Lever for locking from inside. Door is kept in the opened position with a gas strut. Going with opened door is not recommended. Door might be damaged.

24 24 SAFETY CAB REAR WINDOW Rear window is equipped with handle and is kept in the open position by gas struts. We recommend latching the window in closed position when driving on uneven terrain - danger of window cracking. Before starting the job with machines implemented in the rear three point hitch be sure that the interference between hitched implement and opened rear window is avoided at the maximal lifting of the rear three point hitch. In case of interference we recommend to work with closed window. F 24 F 25 F 26 SIDE WINDOW A plastic latch in the opened position locks side window. TILTABLE ROOF LID Pressing the mechanism opens roof lid. Tiltable lid is kept with gas struts in the opened position. Tractor height is increased when opened lid. That s why close the lid when passing through low profiles.

25 25 SAFETY CAB OPENING FOR IMPLEMENTATION PURPOSES The bottom window is rigid and is equipped with opening for connection of controls with attached implements. F 27 F 28 F 29 WINDSHIELD WASHER The washer nozzle is adjustable by needle of max. diameter 0,8 mm. WASHER TANK Washer tank is accessible after tilting the hood or after removing the front mask. WASHER CONTROL The windshield washer sprays after pressing the switch of front double speed wiper. This switch is located on the right cab pillar. Maximal time of uninterrupted spraying is 20 s.

26 26 SAFETY CAB PASSENGER S SEAT Passengerřs seat is tiltable. A - Unlock the seat strut and tilt the seat. B - Seat is locked in its tilted position on fender. F 30 F 31 F 32 SPACE FOR DRIVER S NEEDS AND TOOLBOX The space is located on the left-hand side nearby driverřs seat. Toolbox is located behind the driverřs seat in the rear part of cab. REARVIEW MIRRORS Adjust rearview mirrors before driving or starting the job to be able to see the road or the field.

27 27 DRIVER S SEAT MARS SEAT ADJUSTMENT FOR DRIVER S WEIGHT The suspension of seat is adjustable for driverřs weight from 50 up to 120 kg. Turning of square knob does adjustment. Weight indicator is located in the slot of rear seat cover. Spring stroke is 120 mm. Do not adjust the seat on the go. Danger of accident. F 33 F 34 F 35 LONGITUDINAL SEAT ADJUSTMENT The seat can be longitudinally adjusted within range 75 mm (11 positions). VERTICAL SEAT ADJUSTMENT The right hand side lever does vertical seat adjustment within range 30 mm ( 3 positions).

28 28 DRIVER S SEAT - GRAMMER DRIVER S SEAT GRAMMER Tractor can be equipped with the seat Grammer as an option. F 36 F 37 F 38 SEAT ADJUSTMENT FOR DRIVER S WEIGHT Adjust the seat by a plastic knob located on the front part of seat support. LONGITUDINAL SEAT ADJUSTMENT Adjust the longitudinal position of seat by a lever located on the left hand side of the seat.

29 29 DRIVER S SEAT - COBO DRIVER S SEAT COBO Tractor can be equipped with the seat Cobo as an option. F 39 F 40 F 41 SEAT ADJUSTMENT FOR DRIVER S WEIGHT Adjust the seat by rotating the lever after its tilting into working position. LONGITUDINAL SEAT ADJUSTMENT AND BACKREST ADJUSTMENT Adjust the seat by lever on the right hand side of seat. Adjust the backrest by rotating a plastic knob located on the right, rear side of seat.

30 30 CONTROLS TILTABLE STEERING WHEEL Tiltable steering column enables variable angle and height adjustment of the steering wheel. Both functions are operated by one lever. F 42 F 43 F 44 ANGLE ADJUSTMENT Angle adjustment enables 10 positions with step 4 in range: -16 up u to +24 down. TELESCOPIC ADJUSTMENT Steering wheel is adjustable within range 0-80 mm in any angle position.

31 31 CONTROLS CONTROL PANEL OF HEATING, AIR- CONDITIONING AND RADIO 1. Four-speed switch of heating blowers 2. Shut off heater and AC recycling control 3. Heater valve control lever - right - heating on - left - heating off 4. switch of air-conditioning 5. Radio can be assembled into the space under the heating panel F 45 F 46 F 47 FOUR-SPEED SWITCH OF HEATING BLOWERS a - vertical position - blower is off b - first right position - blower low speed c - second right position - blower middle speed d - third right position - blower high speed CONTROL PANEL ON RIGHT CAB PILLAR 5. Control switch of rear PTO 6. Control switch of front PTO 7. Cab illumination 8. Two speed switch of front windshield wiper and front washer. 9. Switch of rear window wiper. 10. Control switch of three point hitch lifting (for lifting the implement when turning in the field)

32 32 CONTROLS VENTILATION OUTLETS AND RADIO SPEAKERS 11. Adjustable outlets of ventilation, heating and AC 12. Radio speakers (only in case of preparation assembly for radio) F 48 F 49 DEFROSTING THE FRONT WINDSHIELD For fast defrosting of front windshield the A middle outlets needs to be directed to the front windshield with 45 angle from vertical position the "B" side outlets directed towards front corners of cab. After front wind shield defrosting the side outlets can be directed towards door glasses for their step by step defrosting. After defrosting the outlets should be adjusted that way not to blow the air directly to the driver but to driver řs legs.

33 33 CONTROLS AC CONTROL The switch with symbol of flake controls air-conditioning. It is necessary to create overpressure in the cab for the proper function of AC. Thatřs why we recommend to shut all windows, doors and cab roof cover. F 50 F 51 F 52 COOLING THE CAB For fast cooling the inner space of cab move the heating shut off lever (2) into the left position (i.e. fresh air inlet is closed). Choose the desired blower speed by the four speed blower switch (position 1, 2, 3). Set outlets with desired angle to avoid direct blowing to persons in the tractor cab (possible injury because of intensive cooling of person řs body). AC OPERATION With switched AC and permanently closed heating shut off lever (2) in left position (i.e. fresh air circuit closed) the inner air is breathed out. Persons could become tired. Thatřs why we recommend do move the lever (2) into the right position (fresh air opened) immediately after cooling down and reduction of the inner temperature to desired level. The fluent regulation of system is carried out by partial opening of the heating valve with heating control lever (3). At the same time dry air from AC system becomes moisture by this way.

34 34 DASHBOARD (analogue) F 53

35 35 LOCATION OF DASHBOARD Analogue dashboard is assembled as a standard equipment at tractors Z 8621, Z 8641, Z 9621, Z 9641, Z DESCRIPTION OF INSTRUMENTS A - indicator lights B - air pressure gauge C - tachometer with mechanical hourcounter D - fuel gauge E - coolant thermometer DASHBOARD (analogue) INDICATOR LIGHTS 1. High beam light (blue). It lights if high beam head lights are ON. 2. Turn signal indicator light (green). 3. Turn signal indicator light (green) - first trailer 4. Turn signal indicator light (green) - second trailer 5. Indicator light of min. air pressure in braking system (red): it lights if the air pressure of air trailer brakes drops under a critical margin i.e. 450 kpa. 6. Parking brake (red). It is on if the hand brake is set. 7. Charging indicator light (red). This is on after charging failure. 8. Lubrication indicator light (red). It is on if the engine oil pressure drops below 120 to 60 kpa. 9. Air cleaner clogging indicator light is on after air cleaner clogging (yellow). 10. Indicator light of hazard lamp 11. Indicator light of critical coolant temperature (red) is on after exceeding temperature approx. above 100 C (not connected). 12. Indicator light of Hi-Lo (torque multiplier) (green 1 st stage) 13. Indicator light of Hi-Lo (torque multiplier) (green 2 nd stage) 14. Indicator light indicating critical failure in hydrostatic steering (not nocnnected) 15. Min. fuel level indicator light (orange). It lights if 1/6 to 1/10 of fuel tank capacity stays at the fuel tank 16. PTO indicator light 17. Indicator light indicates wearing of cardan brake. 18. Glowing indicator light (yellow) 19. Free 20. Free

36 36 DIGITAL DASHBOARD F 54

37 37 LOCATION OF DASHBOARD Digital dashboard is assembled as a standard equipment on tractors Z and as an option on Z Z DESCRIPTION OF INSTRUMENTS A - indicator lights B - air pressure gauge C - tachometer with hour-counter D - fuel gauge E - coolant thermometer F - display DIGITAL DASHBOARD INDICATOR LIGHTS AND PUSH BUTTONS Location of indicator lights on digital dashboard is equal to analogue dashboard. 21. Indicator light of immediate travel speed 22. Indicator light of PTO 1000 RPM 23. Indicator light of PTO 540 RPM 24. Symbol of immediate travel speed - km/h 25. Symbol of RPM 26. symbol of voltage - V 27. Symbol of km 28. Symbol of battery 29. Symbol of traveled distance 30. Reset button for resetting the (day) displayed data. 31. Button of battery voltage. Voltage is displayed (with accuracy 0,1 V) and simultaneously the indicator lights No 26 and 28 are ON. 32. Button of traveled distance (within the day or from the time of last resetting). No of kilometers is displayed and simultaneously the indicator lights No 27 and 29 are ON. 33. Button of immediate travel speed in v km.h -1, the speed is displayed and simultaneously the indicator light No 21 and 24 is ON. 34. Button of PTO 1000 RPM. Speed with accuracy 10 RPM is displayed and simultaneously the indicator lights No 22 and 25 are ON. 35. Button of PTO 540 RPM is displayed and simultaneously the indicator lights No 23 and 25 are ON.

38 38 CONTROLS SWITCHES WITH LEVERS a - Light switch b - Switch of front grill light and roof light (low beam) c - Fog light switch (ON - OFF). Function of fog light is indicated by illuminated symbol. d - Working light switch (ON - OFF). Function of working light is indica ted by illuminated symbol. e - Warning light switch f - Front wheel drive control switch. Engaged front wheel drive axle is indicated by switch symbol - ON. g - plugged h - plugged i - plugged j - differential lock (locks) button k - stopping device - at tractors Z ) l - Toggle switch - turn signal, horn, lights, high and low beam headlight switch, acoustic horn. F 55

39 39 CONTROLS LIGHT SWITCH (a) a - Lights are OFF b - Clearance lights and tail lights, license plate light and illumination of instruments are ON c - All electrical appliances are nocnnected as in b position. Moreover low and high beam lamps are ON according to the position of toggle switch. F 56 F 57 F 58 FRONT WHEEL DRIVE SWITCH (d) Use the front driving axle for increasing the pulling force when rear wheels slippage. a - front driving axle disengaged b - front driving axle engaged Front driving axle is engaged at stopped tractor (braked tractor, stopped engine). Front driving axle is engaged in the basic position (indicator lamp ON ) and the switch disengages the axle. HAZARD LIGHT SWITCH (f) a - Hazard lights are off. b - Hazard lights are on Flashing of indicator light on the dashboard indicates function of hazard lights.

40 40 CONTROLS SWITCH OF GRILL AND CAB HEAD- LIGHT (g) a - cab roof headlights are OFF b - cab roof headlights are ON The switch controls the headlights in the mask grill or in the tractor cab roof. Use the cab roof headlights only if the front grill headlights are covered by attached implement hitched in the front three point hitch. Symbol on the switch indicates that cab roof headlights are ON. High beam can light in the grill mask only. F 59 F 60 F 61 SWITCH OF REAR (FRONT) DIFFE- RENTIAL LOCK (j) a - differential lock disengaged b - differential lock engaged Diff lock is engaged by pressing the diff lock push button that is returned into the previous position after loosing. Symbol on the switch indicates that the diff lock is engaged. Differential lock is automatically disengaged after pressing brake pedals. At tractors equipped with front driving axle with pin lock, this is engaged simultaneously with the rear diff lock. TURN SIGNAL, HEADLIGHT AND HORN TOGGLE SWITCH (i) a - Turn signal - right. b - Turn signal - left. c - Acoustic horn press the toggle switch in axis direction d - High beam light

41 41 KEY SWITCH KEY SWITCH Key switch is located on the front part of steering wheel support under the dashboard. F 62 F 63 F 64 KEY IN "0" POSITION All electrical appliances controlled by the key switch are disconnected. The key can be removed. KEY IN "I" POSITION All electrical appliances controlled by the key switch are connected except of starter motor. The key is located in this position when running the engine.

42 42 KEY SWITCH F 65 KEY IN II POSITION Starter motor is connected in this position. All electrical appliances controlled by the key switch are connected except of wipers, washer, blower of cab and AC. The key is turned automatically to I position after starting.

43 43 CONTROLS THROTTLE CONTROL LEVER A - Max. throttle B - Stop Only at tractors Z Z F 67 F 68 F 69 STOPPING DEVICE Pull the stopping device upwards and keep it in pulled position, the engine will be immediately stopped. Only at tractors Z Z ELECTRONIC HAND THROTTLE CONTROL The system electronically controls speed of engine and controls fuel delivery (see chapter Electronic governor). Engine is stopped by turning the key into 0 position at this system.

44 44 CONTROLS PEDALS AND LEVERS 1. Travel clutch pedal 2. Foot operated service brake pedals connected by latch 3. Foot throttle pedal F 70 F 71 F 72 MAIN GEAR SHIFTING LEVER AND REVERSOR LEVER 1. Main shifting lever with push buttons for three-stage Hi-Lo (torque multiplier) 2. Reversor lever SHIFTING LEVER OF ROAD SPEED AND REDUCED SPEED The lever is located on the right hand side at driverřs seat. H - road speeds N - neutral L - reduced speeds

45 45 CONTROLS PTO SELECTION CONTROL LEVER FOR SHIFTING OF PTO INDEPEN- DENT AND GROUND SPEED Lever is located on the right hand side at driverřs seat. PTO - Independent PTO speed is shifted N - Neutral position PTO synchro - PTO ground speed is shifted (RPM depends upon tractor travel speed) F 73 F 74 F 75 PARKING BRAKE LEVER AND PICK UP HITCH CONTROL LEVER 1. Parking brake lever a - disbraked b - braked 2. Pick up hitch control lever a - transport position b - pick up hitch is unlocked (lowered) HYDRAULIC CONTROL a - mechanical hydraulic control b - Electro-hydraulic Description of hydraulic control is mentioned in chapter hydraulic equipment.

46 46 ACQUAINTANCE WITH TRACTOR HAND CONTROL OF SELECTION CONTROL VALVE At tractors equipped with hydraulic control of pick up hitch, lowering the pick up hitch is controlled by SCV control lever (a) (usually the right hand side SCV lever or by operatorřs choice). F 76 F 77 F 78 FUEL TANK Plastic fuel tank with capacity 180 liters is assembled as a standard. Do not step on the fuel tank! DRAINING PLUG OF FUEL TANK The opening for draining impurities and fuel is located in the bottom part of fuel tank.

47 47 ACQUAINTANCE WITH TRACTOR AVERAGE FUEL CONSUMPTION IN LITTERS PER OPERATING HOUR Tractor type Engine load 100% 80% 50% Z 8621, ,99 14,39 10,07 Z 9621, ,07 16,06 11,24 Z ,86 17,49 12,24 Z ,30 22,64 15,84 F 79 F 80 BATTERY SWITCH Battery switch is located on the left hand side underneath the front part of cab.

48 ACQUAINTANCE WITH TRACTOR LOCATION OF INFORMATION AND SAFETY DECALS 2. Warning decal - hand 3. Decal 4-speed transmission 5. warning of operating space 48 F coefficient of absorption 0,86

49 49 ACQUAINTANCE WITH TRACTOR 7. warning of starter motor 8. ECE label 9. EPA label

50 NOTE 50

51 ELECTRONIC ENGINE GOVERNOR Page Schema of electronic engine control system Push button - MAX...53 Push button - MIN...53 Push button - MEM...53 Indicator lamp H/O...54 Function of electronic governor Setting the temporary memory Resetting and deleting the temporary memory Setting the permanent memory Permanent memory recall - H/O lamp is off Permanent memory recall - H/O lamp is on Memory reset - return to pedal control Setting the entry and exit speed at tillage and enter to memory Setting the operating speed and enter to temporary memory Tillage with operating speed temporarily memorised Reset of temporary memory and recall of entry and exit speed memory Reset of permanent memory, setting the operating speed and its temporary memorising Tillage with operating speed temporarily memorised Setting the PTO speed Setting the constant travel speed PTO speed engagement and setting the PTO speed for 540 or 1000 RPM Temporary memorising the PTO speed Manoeuvring with tractor and reset of temporary memory...61 All tractors Z are equipped with electronic engine governor. 51

52 52 ELECTRONIC ENGINE GOVERNOR SCHEMA OF ELECTRONIC ENGINE CONTROL SYSTEM System consists of the following main components and of wiring harness. A - Electronic control unit (E.C.U.) B - Hand throttle control the control has three keypads and LED. C - Potentiometer mechanically linked with foot throttle pedal D - Engine speed sensor E - Governor control actuator RPM

53 53 ELECTRONIC ENGINE GOVERNOR PUSH BUTTON - MAX Push button (keypad) - max serves for increasing the engine speed. Engine speed can be increased by keypad - max. by two ways. 1. Pulse pressing the keypad causes gradual change of engine speed. 2. Permanent pressing the keypad causes the immediate increase of engine speed. Engine speed is increased up to time when you release the keypad. This keypad controls the memory if combined with keypad MEM. RPM1 RPM2 RPM3 PUSH BUTTON - MIN Push button (keypad) - MIN serves for decreasing the engine speed. Control of keypad MIN is equal to control of keypad MAX for increasing the engine speed (1, 2). This keypad controls the memory if combined with keypad MEM. PUSH BUTTON - MEM Push button (keypad) - MEM serves for entering, recalling and resetting the engine speed in memory of system. This keypad is used either separately (1) or in connection with keypads MIN or MAX (2, 3).

54 54 ELECTRONIC ENGINE GOVERNOR INDICATOR LAMP H/O Indicator lamp H/O indicates switching on or off the function of keypad MEM. Indicator lamp indicates entering, recalling and resetting the engine speed in memory of system and moreover it indicates limiting the range of engine speed increase or decrease. RPM4 RPM5 RPM6 FUNCTION OF ELECTRONIC GOVER- NOR 1. Setting the temporary memory 2. Resetting and deleting the temporary memory 3. Setting the permanent memory 4. Permanent memory recall - H/O lamp is off 5. Permanent memory recall - H/O lamp is on 6. Memory reset - return to pedal control Engine speed, determined for memorizing to memory system, can be set either by throttle control or by foot throttle control (throttle pedal). Enter, recall and reset of memory is possible on the keyboard of hand throttle control. SETTING THE TEMPORARY MEMORY 1. Indicator lamp H/O must be off. 2. Set the desired engine speed by hand (keypad MIN or MAX) or foot throttle control, for example 1600 RPM. 3. Press the keypad MEM; indicator lamp H/O turns on. 4. Set engine speed 1600 RPM is memorized. Since this setting, it is not necessary to set the engine speed anymore. You can loose the foot throttle pedal. Engine speed is maintained in the constant level (for example 1600 RPM) temporarily memorized, independently upon tractor load.

55 55 ELECTRONIC ENGINE GOVERNOR With such way set constant value (for example 1600 RPM) it is possible to set the engine speed by means of hand or foot throttle control and the entered memory will not be lost. a - You can increase or decrease the engine speed by hand throttle control. Increase or decrease the engine speed by interrupted pressing of keypad MIN or MAX. b - You can only increase the engine speed by foot throttle control. After loosing the foot throttle pedal the engine speed drops again to the value entered in temporary memory (for example 1600 RPM). RPM7 RPM8 RPM9 RESETTING AND DELETING THE TEMPORARY MEMORY 1. Indicator lamp H/O is on. 2. Press the keypad MEM. 3. Indicator lamp H/O turns off. Temporary memory is off. It is not possible to recall it again. In this time the set value (for example 1600 RPM) is definitively deleted. The same will happen after switching off the key in the key switch. SETTING THE PERMANENT MEMORY 1. Indicator lamp H/O must be off. 2. Set the desired engine speed by hand (keypads MIN or MAX) or foot throttle control. 3. Press both keypads MEM and MIN or MAX depending if you want to enter into memory minimal or maximal engine speed. 4. Indicator lamp H/O is on. Since this setting the engine speed is entered into the permanent memory.

56 56 ELECTRONIC ENGINE GOVERNOR 1. In case the minimal engine speed is being entered it is not possible to enter the value higher than 1500 RPM. If you will try it the system will automatically enter 1500 RPM. 2. In case the maximal engine speed is being entered it is not possible to enter the value smaller than 1500 RPM. If you will try it the system will automatically enter 1500 RPM. RPM10 RPM11 RPM12 Two values can be entered into permanent memory i.e. chosen minimal and maximal engine speed. These values will be memorized in the permanent memory even after stopping the engine and removing the key from the key switch. If you will enter the new minimal and maximal engine speed into the permanent memory the previously entered values will be deleted and replaced by new ones i.e. new values set by you. PERMANENT MEMORY RECALL - H/O LAMP IS OFF 1. Indicator lamp H/O is off. 2. Press the keypad MIN or MAX (depending if you want to recall maximal or minimal speed entered in memory) and keep it pressed (longer time than 0,5 sec.). 3. Indicator lamp H/O turns on. Memory is recalled. Engine will maintain the recalled constant speed. Engine speed can be set after this action by:

57 ELECTRONIC ENGINE GOVERNOR a - by hand throttle control i.e. by interrupted pressing the keypads MIN or MAX. After loosening the keypads, the engine speed will be changed to engine speed recalled from the permanent memory. b - by foot throttle control (by throttle pedal) and the engine speed can be increased only. After loosening the keypads, the engine speed will be changed to engine speed recalled from the permanent memory. RPM13 RPM14 RPM15 PERMANENT MEMORY RECALL - H/O LAMP IS ON 1. Indicator lamp H/O is on. Indicator lamp is on in that case if you have already recalled minimal or maximal speed from the permanent memory. Or if the set speed is entered in the temporary memory. 2. Press the keypad MIN or MAX depending on which speed you want to switch the memory of system and keep it pressed (longer time than 0,5 sec.). Attention! In case the indicator lamp H/O indicated the function of temporary memory (set speed was entered in the temporary memory) this engine speed will be definitively deleted after recall of values from permanent memory. 57 MEMORY RESET - RETURN TO PE- DAL CONTROL 1. Indicator lamp H/O is on. Tractor works with engine speed entered in temporary or permanent memory. 2. Press the keypad MEM. 3. Indicator lamp H/O turns off. Temporary or permanent memory is switched off. Set engine speed in temporary memory is deleted, set engine speeds in permanent memory are kept. Now engine speed can be set by foot throttle pedal or hand throttle control without any restriction (by interrupted pressing of keypad MIN or MAX).

58 58 ELECTRONIC ENGINE GOVERNOR 1. SETTING THE ENTRY AND EXIT SPEED AT TILLAGE AND ENTER TO MEMORY 1. Indicator lamp H/O is off. 2. Set the entry and exit travel speed of tractor by the keypad MIN or MAX (for example 1600 RPM) 3. Press both keypads MAX and MEM. (the speed is entered into permanent memory). 4. Indicator lamp H/O is on. 2. SETTING THE OPERATING SPEED AND ENTER TO TEMPORARY ME- MORY 1. Turn off the indicator lamp H/O by keypad MEM. 2. Set the operating engine speed by foot throttle control (foot throttle pedal) 3. Press the keypad MEM. Indicator lamp H/O turns on. The speed is entered in permanent memory. RPM16 3. TILLAGE WITH OPERATING SPEED TEMPORARILY MEMORISED Since you entered the operating engine speed into the temporary memory no correction of speed is necessary. System automatically maintains the constant level of operating engine speed entered in the temporary memory independently upon tractor load.

59 59 ELECTRONIC ENGINE GOVERNOR 4. RESET OF TEMPORARY MEMORY AND RECALL OF ENTRY AND EXIT SPEED MEMORY 1. Increase engine speed by foot throttle control to avoid sudden dropping of speed. 2. Press the keypad MEM. Indicator lamp H/O turns off. Temporary memory is switched off and entered value is definitively lost. 3. Press and keep (longer than 0,5 sec.) the keypad MAX. You will recall the value entered in permanent memory by this way. Now the engine works in regime of entry and exit speed. 5. RESET OF PERMANENT MEMORY, SETTING THE OPERATING SPEED AND ITS TEMPORARY MEMORISING 1. Press the keypad MEM. Indicator lamp H/O turns off. Permanent memory is switched off. 2. Again set the operating engine speed by foot throttle control (foot throttle pedal). 3. Press the keypad MEM. Indicator lamp H/O turns on. The speed is now entered into temporary memory. RPM16 6. TILLAGE WITH OPERATING SPEED TEMPORARILY MEMORISED Activities that are mentioned in point 6 are equal to point 3.

60 60 ELECTRONIC ENGINE GOVERNOR 1. SETTING THE PTO SPEED Choose the PTO speed 540 or 1000 RPM by the end of rear PTO shaft. 2. SETTING THE CONSTANT TRAVEL SPEED 1. Set the engine speed by keypad MIN or MAX corresponding to desired travel speed. 2. Indicator lamp H/O stays off. RPM17 3. PTO SPEED ENGAGEMENT AND SETTING THE PTO SPEED FOR 540 OR 1000 RPM 1. Engage the independent speed of PTO shaft. 2. Set the engine speed by foot throttle control (foot throttle pedal) corresponding to desired speed of PTO shaft in range 540 or 1000 RPM.

61 61 ELECTRONIC ENGINE GOVERNOR 4. TEMPORARY MEMORISING THE PTO SPEED 1. Press the keypad MAX. Indicator lamp H/O turns on. Since this the set engine speed corresponding the PTO speed 540 or 1000 RPM is entered in the temporary memory. System will automatically maintain the constant speed of PTO independently upon load of tractor. 5. MANOEUVRING WITH TRACTOR AND RESET OF TEMPORARY MEMORY 1. Disengage the PTO shaft when manoeuvring the tractor with implement. 2. Press the keypad MEM. Indicator lamp H/O turns off. Since this the temporary memory is switched off and values entered in temporary memory are definitively lost. The engine works with speed corresponding to travel speed set by keypads MIN or MAX. RPM17

62 NOTE 62

63 Be familiar with shifting pattern and test all positions of shifting lever at stopped engine before driving the new tractor. Be sure that the technical status of tractor corresponds to the safety traffic condition before driving. OPERATION Page Before starting...65 Starting the engine equipped with glow plugs Starting the engine equipped with electronic thermostart...66 If engine doesnřt start Forbidden starts...67 Coolant heater...68 Starting the engine with coolant heater...68 Immediately after starting Preheating the engine Gear shifting...70 Reversor lever...70 Shifting the road and reduced speeds...70 Shifting from lower to higher gear speed...71 Shifting from higher to lower gear...71 Three stage hi-lo (torque multiplier)...71 Indication of hi-lo function Hi-lo shiftinng...72 Acceleratig the tractor Driving uphill...74 Driving downhill...74 Service brakes...74 Front drum brakes...75 Front cardan brake...75 Air trailer brakes...75 Warning device of air pressure drop...76 Single and double hose air brakes...76 Air tanks Single hose air trailer brakes Double hose air trailer brakes Hydraulic trailer brakes Control of front driving axle Driving with engaged front driving axle

64 64 OPERATION Page Free space round cardan shaft Stopping the tractor - parking brake Stopping the engine Leaving the tractor... 80

65 OPERATION BEFORE STARTING Before starting the engine be sure that 1. the tractor is braked by parking brake. 2. main shifting lever and reversor lever is in neutral position. If the shifting lever is in a different then neutral position tractor can not be started - safety interlock switch is not actuated. F 82 F 83 F 84 STARTING THE ENGINE EQUIPPED WITH GLOW PLUGS Tractors Z are equipped with glow plugs as a standard. 1. Insert the key into the key switch ("0" position). 2. Depress the clutch pedal. 3. Move the main shifting lever and reversor lever into neutral. 4. Set the increased throttle control (approx. 3/4 maximal delivery). 5. Turn the key into "I" position. Yellow indication lamp on the dashboard is ON. The indication lamp indicates correct function of glowing. In case the indication lamp is flashing the glowing system failed. In spite of this, the engine can be started but without function of 65 glow plugs. Let repair the indicated failure in a specialized workshop. 6. Wait until the indication lamp is off. 7. Turn the key into "II" position (start). 8. Release the key immediately after starting the engine. Do not start longer then 15 sec. 9. After starting the engine, reduce gradually the fuel delivery. Avoid running the engine at high speed. Note: According to the personal experiences of driver it is possible to start sooner then glow indicating lamp is off. Proceed similarly when starting the hot engine.

66 66 OPERATION STARTING THE ENGINE EQUIPPED WITH ELECTRONIC THERMOSTART Tractors Z are equipped with electronic thermostart as a standard. Thermostart enables starting the engine at lower temperatures. Time of glowing and the process of fuel ignition in suction manifold is controlled automatically. Note: Before proper starting we recommend to prime the fuel system by several strokes of fuel delivery pump. F 85 F 86 F Insert the key into the key switch ("0" position). 2. Depress the clutch pedal. 3. Move the main shifting lever and reversor lever into neutral. 4. Turn the key through "I" position into "II" position and (start) crank the engine only (when hot starts this point can be eliminated). 5. Turn the key into "I" position. Yellow indication lamp on the dashboard is ON. The indicator lamp indicates correct function of thermostart glowing (when higher ambient temperatures the thermostart function is not initiated). 6. Wait until the indication lamp is off. 7. Turn the key into "II" position (start). 8. Release the key immediately after starting the engine. Do not start longer time then 10 sec. 9. After starting the engine, avoid running the engine at high speed.

67 67 OPERATION IF ENGINE DOESN T START Wait 30 seconds. Turn the key into position "0" and repeat starting. Never help to the stopping engine by starter motor. You will avoid damage of starter motor. Never start longer than 10 sec. at tractors Z Start needs to be repeated. F 88 F 89 FORBIDDEN STARTS It is forbidden to start the tractor by short circuit of starter motor connectors. Start from the driver s seat only. Disconnect the ground battery pole, shift all levers into neutral position, including PTO engagement, when any manipulation with starter or repairing it. A cover protects starter motor connectors.

68 68 OPERATION COOLANT HEATER Coolant heater is assembled into engine block as an option. At tractors Z Z 10641output of heater is 1000 W with voltage 220 V of alternating electrical current. At tractors Z output of heater is 500 W with voltage 220 V of alternating electrical current F 90 F 91 STARTING THE ENGINE WITH COOLANT HEATER Heater enables starting the engine at low ambient temperature by preheating the coolant. The electrical installation and its protection against electrical shock hazard must be done according to the proper regulations 1. Plug the heater first. 2. Plug the cable with heater into 220 V electricity after. With regard to reduction of engine wear when starting at low temperatures, producer recommends to use heater. The time of preheating depends upon the ambient temperature (1 to 2 hours are sufficient before supposed starting). After heating, unplug the electricity first and the heater after. ELECTRICAL SHOCK HAZARD!

69 69 OPERATION IMMEDIATELY AFTER STARTING After starting set the engine speed to 800 up to 1000 RPM and let the engine idle for 3 minutes without load. In this time check for proper lubrication, charging (indicator lights must be off ) and other functions assuring the correct engine operation. Time of engine idle without load must be kept especially in winter season. F 92 F 93 PREHEATING THE ENGINE Continue with farther preheating the engine already while driving. Warming up the engine by long idle run or fast increase of speed is dangerous for the engine. Do not exceed engine speed above RPM until the coolant temperature reaches 45 C.

70 70 OPERATION GEAR SHIFTING Tractors are equipped with four speed synchronized gearbox, three stage power shift - Hi-Lo (torque multiplier) reversor, and two stage reduction gear. Four-speed gearbox is shifted by the main shifting lever with grip push buttons intended for Hi-Lo control (1). Forward and reverse speed is shifted by reversor lever (2). The fourth speed can not be shifted when shifted reverse speed (it is blocked). F 94 F 95 F 96 REVERSOR LEVER You select the tractor direction by reversor shifting lever (forward, reverse). F - Forward speed (24 speeds) A - Neutral R - reverse speed (18 speeds) There are 18 reverse gears available at reversible gearbox, the reverse speeds are approximately so fast as forward speeds. Thatřs why take this well into consideration and choose the suitable reverse speed for the given character of the operation. Shift the reversor with depressed clutch pedal and with stopped tractor. Shift the reverse lever into position R SHIFTING THE ROAD AND REDUCED SPEEDS H - Road speeds N - neutral L - Reduced speeds Gear shifting of reduced speeds is the same as shifting of road speeds. Shifting lever of road - reduced speeds can be shifted at stopped tractor only.

71 71 OPERATION SHIFTING FROM LOWER TO HIGHER GEAR SPEED Depress the clutch pedal (clutch disengaged). In the same time loosen the throttle pedal and shift the proper higher gear speed. Fluently release the clutch pedal (the clutch starts engaging) and simultaneously increase engine speed. F 97 F 98 F 99 SHIFTING FROM HIGHER TO LOWER GEAR Depress the clutch pedal and shift the shifting lever through neutral position to lower gear speed. Note: So-called double clutching can be used for increasing the life of synchronizers when shifting from higher to lower gears. THREE STAGE HI-LO (TORQUE MUL- TIPLIER) Three stage Hi-Lo is a standard equipment of all tractor types. The particular stage of Hi-Lo is shifted by means of two push buttons located on the shifting lever grip. Shifting is done without depressing the travel clutch (power shift). The shifting alone is automatic even under the load of tractor. H gear ratio 1,00 (Hi) M gear ratio 1,16 (middle) L gear ratio 1,34 (Lo)

72 72 OPERATION INDICATION OF HI-LO FUNCTION The particular shifted stages of Hi- Lo (H,M,L) are indicated by indicator lamps with symbols of turtles. H Lamps with symbols are off M L One lamp with turtle symbol is on Two lamps with turtle symbol are on Note: The stage is automatically shifted when starting or stopping the tractor. F 100 F 101 F 102 HI-LO SHIFTINNG H Travel speed increased L Travel speed decreased 2xH 2xL Travel speed increased by two stages Travel speed decreased by two stages Note: Description of push buttons right, left is taken in forward direction of tractor travel.

73 OPERATION ACCELERATIG THE TRACTOR 1. Select road or reduced gear. 2. Depress the clutch pedal. 3. Shift the main shifting lever and reversor lever into neutral. 4. Start the engine. 5. Set the engine speed to 750 up to 800 RPM. 6. Shift the reversor lever into the desired direction of tractor movement (forward or reverse). 7. Shift the proper gear speed suitable for starting the movement 8. Slightly increase the engine speed. 9. Prepare the parking brake for releasing. 10. Release the clutch pedal up to point where the tractor starts to move and simultaneously with engine speed 73 F 103 increasing, continue with smooth releasing the clutch. 11. Fully release the parking brake. 12. Accelerate smoothly and slowly. Fast acceleration can cause the overload of transmission, increased fuel consumption, excessive tire wear and damage of the transported load. Use the 1 st gear only for accelerating when driving with heavy trailer uphill and in heavy terrain.

74 74 OPERATION DRIVING UPHILL Shift from higher to lower speed in time when going uphill, to avoid dropping the engine speed below 800 RPM and stopping the engine by overloading. F 104 F 105 F 106 DRIVING DOWNHILL Driving downhill without the shifted gear is forbidden. If driving down the long hill, shift so low gear the sharper one the hill is. If possible shift the lower gear before driving downhill. Remember: The gear you use reliably for driving uphill is safely suitable for driving downhill. SERVICE BRAKES Service brakes are of disc wet type, hydraulically actuated with double pedal, and automatic pressure compensator. Both brake pedals must be latched together when driving on the road. Use unlatched pedals only for braking right or left wheel separately when working in terrain and fields.

75 75 OPERATION FRONT DRUM BRAKES Front drum brakes are assembled on tractors with front non-driven axle Z 8621, Z 9621 as an option. Front brake is not in function when braking with one pedal only. F 107 F 108 F 109 FRONT CARDAN BRAKE Front cardan brake is assembled on tractors with front driving axle as an option. Front cardan brake is assembled as a standard on 4WD tractors with transmission for 40 km/h. Moreover there is a cardan brake amplifier as standard equipment at tractors Z Front cardan brake is not in function when braking with one pedal only. AIR TRAILER BRAKES The control of air trailer brake is synchronized with tractor brake control including the brake effect. Operating pressure is set by a pressure valve (regulator) adjusted to kpa. If the pressure drops under kpa the priority valve disconnects pneumatic circuits of secondary appliances: differential lock control, front wheel drive control, three point hitch pneumatic control, Hi-Lo (torque multiplier), PTO control.

76 76 OPERATION WARNING DEVICE OF AIR PRES- SURE DROP Dropping of air pressure under critical margin 450 kpa is indicated by red indicator lamp located on the dashboard. Tractor with a braked trailer can not continue in driving when air pressure drops under the critical margin and until the pressure is increased F 110 F 111 F 111a SINGLE AND DOUBLE HOSE AIR BRAKES I - Coupling of single hose air brake system. II - Couplings of double hose air brake system. Couplings must be covered by a cap if the trailer is not hitched. AIR TANKS Tractors are equipped with an air tank of capacity 12 l as a standard. The air tank is located on the right side of tractor in front of the rear axle. When the tractor is equipped with air trailer brakes an extra air tank of capacity 12 l is assembled on the left hand side of tractor in front of the rear axle as a standard. Both air tanks are assembled on tractors Z as a standard

77 77 OPERATION SINGLE HOSE AIR TRAILER BRAKES Operating pressure is set by a pressure valve (regulator) adjusted to kpa. Capacity of both air tanks is 24 l. The allowed speed of tractor equipped with single hose air trailer brakes and with hitched trailer is max. 25 km/h. F 112 F 113 DOUBLE HOSE AIR TRAILER BRAKES Operating pressure is set to kpa Capacity of air tanks is 24 l. Left coupling cover is yellow, right coupling cover is red. The allowed speed of tractor equipped with double hose air trailer brakes and with hitched trailer is max. 40 km/h.

78 OPERATION HYDRAULIC TRAILER BRAKES Hydraulic trailer brake control is synchronized with braking the tractor including the braking effect. Operating pressure is activated by pressure of oil from hydraulic pump (1). The hydraulic valve (2) is introduced in the circuit of hydraulic pump. The hydraulic pump is of gear type (pump can not be disengaged). The hydraulic trailer brake valve is controlled by the brake fluid pressure activated in master brake cylinder depending upon the force on brake pedal. The pressure in brake coupling (4) must be MPa at maximal press on the brake pedal. Trailer brake valve prioritizes the function of brake to control of hydraulic. Do not forget to bleed the trailer brake valve (2) by vent screw (3) when bleeding the service brakes. In case there are hydraulic shocks in hydraulic circuit if applied service brake pedals it is necessary to bleed the hose (5) coming from brake valve (2) to quick-coupler (4). 78 F 114

79 79 OPERATION CONTROL OF FRONT DRIVING AXLE Front driving axle is engaged in basic position (indicator lamp is ON ). It is disengaged by a switch on the dashboard. a - Front axle is disengaged b - Front axle is engaged Front driving axle is engaged at stopped tractor (stopped tractor, stopped engine). At tractors with pin diff. lock of front driving axle the differential lock must not be locked when driving on the road! Danger of accident when turning! F 116 F 117 F 117a DRIVING WITH ENGAGED FRONT DRIVING AXLE Use the front driving axle when slipping the rear wheels and for increasing the traction force. Driving with engaged front diving axle on the road and hard surface causes an excessive wear of front tires. Permanent engagement of front driving axle is possible if a front agriculture machine or implement is attached to the tractor. This is specified in operatorřs manual of a particular machine. Maximal allowed speed of tractor with such attachment is 15 km/h. FREE SPACE ROUND CARDAN SHAFT Ensure the free space minimally 10 mm round cardan shaft when assembling aggregates or attaching implements. This space must be round the whole length of cardan shaft within any its inclinations. If this rule is not fixed, danger of tractor damage or machine accident is possible!

80 80 OPERATION STOPPING THE TRACTOR - PARKING BRAKE At normal conditions stop the tractor gently and slowly. Shortly before stopping: 1. Depress the clutch pedal 2. Move the main shifting lever into neutral 3. At each tractor stopping set the parking brake and so protect the tractor against accidental movement. Indicator lamp located on the dash indicates parking brake setting. F 118 F 119 A 120 STOPPING THE ENGINE Engine must be cooled after work with fully loaded tractor. 1. First reduce the engine speed to RPM before stopping the engine and let it run without load approximately for 5 minutes. 2. Move the throttle control lever into STOP position. 3. Pull up the stopping device and keep it in pulled position up to stopping the engine. At tractors Z with electronic governor the engine is stopped by turning the key in key switch into 0 position. LEAVING THE TRACTOR Key can be turned from "I" position into "0" position at stopped tractor only indicator lamp of charging must be ON. Tractor must be properly assured against accidental moving when on the hill: braked, with engine off, reverse gear shifted and with low gear shifted by main shifting lever Wheels must be locked by blocks. Remove the key from the key switch and lock the cab at cab tractors before leaving.

81 NOTE 81

82 NOTE 82

83 83 TRACTOR RUNNING IN Page General rules for running in the new tractor within first 100 hours First 10 hours...84 After 10 hours...85 After 10 hours...85 After 50 hours...85 After 70 hours...86 After 70 hours...86 After 70 hours...86 After 100 hours...87 After 100 hours...87

84 84 TRACTOR RUNNING IN GENERAL RULES FOR RUNNING IN THE NEW TRACTOR WITHIN FIRST 100 HOURS Within the first 100 operating hours: - load the engine normally - avoid the partial engine load at operation - avoid the long operation at low idle - frequently inspect the engine oil level (the increased oil consumption is normal in this time) - check the hardware connections especially connections of highly stressed parts of the tractor - immediately remove all found problems. You will avoid subsequent damage eventually even traffic hazard - use a similar process also after general repair of engine. F 121 F 122 FIRST 10 HOURS - run in the tractor at transport operating - tighten front and rear wheel nuts by prescribed torque

85 85 TRACTOR RUNNING IN AFTER 10 HOURS We recommend to drain or suck off the preheated oil from transmission and to filter it by means of filtration device with filtration capability 20 m. Transmission is equipped with 5 draining openings (1x clutch housing, 1x gearbox, 3x differential housing). F 123 F 124 F 125 AFTER 10 HOURS Remove and clean the magnetic element (1) and strainer element of transmission oil suction cleaner (2). Wash both elements in petrol and reassemble after dripping. If necessary add the oil up to the upper mark of dipstick (3). Now you can use the complete hydraulic system of tractor without restrictions. AFTER 50 HOURS At tractors Z drain the hot running in oil from engine and exchange the full-flow engine oil filter. Fill in the engine with new oil to the prescribed level - upper mark of oil dipstick (inspects after engine cranking and oil level stabilizing). It is necessary to let the engine run few minutes before refilling the oil.

86 86 TRACTOR RUNNING IN AFTER 70 HOURS At tractors Z drain the hot oil from engine and exchange the fullflow engine oil filter. Fill in the engine with new oil to the prescribed level (upper mark of oil dipstick - inspect it after cranking the engine and stabilizing the oil level). It is necessary to let the engine run few minutes before refilling the oil. F 126 F 127 F 128 AFTER 70 HOURS Check the torque of cylinder head (at the cold engine, by prescribed torque in prescribed sequence of screws). Do checking, adjustment, head retightening and adjustment of valve clearance in an authorized service. AFTER 70 HOURS Remove and clean: - magnetic element of transmission suction filter (1) - strainer element of transmission oil suction cleaner (2) Exchange: - paper element of full-flow fine cleaner (3)

87 87 TRACTOR RUNNING IN AFTER 100 HOURS After running in you can work with the tractor without any restrictions. The operating regime at tractors Z Z 10641: recommended operating speed RPM low idle speed RPM operating oil 0,2-0,5 MPa pressure oil pressure at low idle speed min. 0,05 MPa coolant temperature C F 129 F 130 AFTER 100 HOURS After running in you can work with the tractor without any restrictions. The operating regime at tractors Z 11641: maximal speed 2350 RPM recommended operating speed RPM low idle speed RPM operating oil 0,35 MPa pressure oil pressure at low idle speed min. 0,05 MPa coolant temperature C

88 NOTE 88

89 NOTE 89

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91 91 TRANSPORTATION Strana Front hook Trailer hitch...92 Mechanical mouth of trailer hitch...92 Automatic mouth of trailer hitch Swinging drawbar...93 Pick up hitch combined with drawbar...94 Exchange of hook for drawbar Drawbar of combined pick up hitch...94 Mechanical unlock of carrier hooks...95 Hydraulic unlock of carrier hooks...95 Drawbar Trailer implementation Before driving be sure that the tractor technical status corresponds to the safe traffic requirements. Verify hitching the trailer and fixing the transported load if attached trailer or agricultural implement. Never leave the tractor being in move for attaching the trailer yourself. Keep also safety of your assistant

92 92 TRANSPORTATION FRONT HOOK Front hook is used only for pulling the tractor that is without any attached trailer or implements. Use the pull bar or rope when releasing the tractor. Never use chains! Hazard of dead injury when the chain is interrupted! At tractors Z the front hook is a part of ballast weight support. Note: When assembled front ballast weight, the pin of front canister weight can be used for emergency releasing the tractor. F 132 F 133 F 134 TRAILER HITCH Trailer hitch is used for attaching the four-wheel trailers or light two-wheel trailers. The trailer hitch is height adjustable in 3 positions by 100 mm. When working with different agricultural machines it is often necessary to adjust, tilt, or eventually remove the hitch with support. MECHANICAL MOUTH OF TRAILER HITCH Hitch pin diameter is 30 mm. Maximal vertical static load is 10 kn.

93 93 TRANSPORTATION AUTOMATIC MOUTH OF TRAILER HITCH For attaching the trailer do the following - pull out the latch (1) and simultaneously raise the main hitch pin (3) into its upper position by means of lever (2). Pin automatically slides into trailer yoke eye after coupling the mouth and yoke. Be sure the latch is back in position after coupling trailer. Maximal allowed vertical static load is 10 kn. F 135 F 136 SWINGING DRAWBAR Swinging drawbar can be set side to side in 5 positions by 80 mm. Drawbar is fixed by the clevis in desired position. The drawbar can be longitudinally set in two positions - measured from the end of PTO shaft (350 or 400 mm). Cross bar above the drawbar enables an operation with implements requiring the floating position of swinging drawbar (with disassembled clevis) Maximal vertical static load of drawbar clevis is 12 kn.

94 94 TRANSPORTATION PICK UP HITCH COMBINED WITH DRAWBAR Pick up hitch is intended for coupling the two-wheel trailers with yoke corresponding to ISO 5692 (the internal yoke eye diameter is 50 mm and eye height is 30 mm). Pick up hitch hook is hydraulically raised and lowered by means of length adjustable telescopic links. The allowed vertical static load of hitch is 24 kn at tractors Z The allowed vertical static load of hitch is 30 kn at tractors Z Pick up hitch is capable for pulling the maximal traction force. F 138 F 139 F 140 EXCHANGE OF HOOK FOR DRAW- BAR The hitch is also equipped with drawbar that is in the opposite side of hitch hook. Drawbar can have three working positions. Change of hitch hook for drawbar is carried out by lowering the hitch hook carrier into position suitable for removing pins (a). Afterwards the hitch hook is removed from the carrier and inserted into such position that the swinging drawbar clevis is in front of carrier. DRAWBAR OF COMBINED PICK UP HITCH Maximal vertical static load is 12 kn. Drawbar is capable for pulling the maximal traction force of tractor.

95 TRANSPORTATION MECHANICAL UNLOCK OF CARRIER HOOKS Carrier hooks are unlocked by lever located on the left hand side of driver s seat. a - transport position b - hook of hitch is unlocked (lowered) 1. Lift hydraulic arms into the upper position (with position control) 2. Move the pick up hitch control lever into position (b) and keep it. 3. Lower hydraulic arms into low position release the lever of pick up hitch control within lowering operation it comes back into its previous position. 4. Attach or disattach the trailer. 5. Lift hydraulic arms into upper position. F 141 F 142 F Hooks snap under pins; afterwards lower hydraulic arms a little. 7. Telescopic links must not be stretched! Keep the minimal play (x)! 95 HYDRAULIC UNLOCK OF CARRIER HOOKS At tractors equipped with hydraulic control of pick up hitch the pick up hitch lowering is controlled by selective control valve lever (usually right SCV lever or according to operator s choice). 1. Lift hydraulic arms into the upper position (with position control). 2. Apply pressure oil into quick-coupler where the hydraulic cylinder is connected. Carrier hooks are unlocked by this way and subsequently return the lever into its neutral position. 3. Lower rear three point hitch into its low position.

96 96 TRANSPORTATION 4. Apply the back-pressure into hydraulic cylinder within lowering operation. Carrier hooks come back into their operating position by this way. Than return the lever into neutral position. 5. Attach or disattach the trailer. 6. Lift hydraulic arms into upper position. 7. Hooks snap under pins; 8. Lower hydraulic arms a little. 9. Telescopic links must not be stretched! Keep the minimal play (x)! F 143a F 144 F 145 DRAWBAR Drawbar is height adjustable by the hydraulic lifting system within its hole lifting range. Only agricultural implements loading permanently the drawbar downwards can be attached to the drawbar. Maximal vertical static load is 8 kn. Disassemble the trailer hitch with support when working with the drawbar. TRAILER IMPLEMENTATION Tractor must be implemented only with suitable tractor trailer because tractor service brakes and air brakes of trailer must match together. Static rear axle load must not exceed the max. allowed axle load of tractor when implemented with two wheel trailer.

97 97 TRANSPORTATION Type Allowed vertical static load Type Allowed vertical static load 10 kn 12 kn 12 kn 5 kn 24 kn 30 kn Maximal weight of implemented braked trailer must not exceed value mentioned in warning tractor label and value mentioned in a technical license of vehicle. Maximal speed of implemented tractor is given by max. allowed speed of slower vehicle.

98 98 TRANSPORTATION Allowed load of pick up hitch at tractors Z 8621, Z 8641, Z 9621, Z 9641, Z 10641, Z Values are valid for tractor with front ballast weight according to the table, without ballast weight of rear wheels, at max. allowed load of rear axle Speed (km/h) Tire 16, , , , , , ,4-38 F (kn) Tractor Type Z 8621 Z 9621 Z 8641 Z 9641 Z , Z , Z , , , , , , , Z 8621 Z 9621 Z 8641 Z 9641 Z , Z Tractor equipment Ballast weights (pcs) = total weight of ballast weights - kg Weight in front of frame (1+2) = 90 kg Under-frame weight (1+3) = 120 kg without ballast weight of rear wheels Under-frame weight (1+3) = 120 kg Weight in front of frame (1+7) = 240 kg without ballast weight of rear wheels Under-frame weight (2) = 96 kg Front weight (weight support + 14) = 619 kg without ballast weight of rear wheels Front three point hitch + weight (16) = 456 kg Front PTO without ballast weight of rear wheels Weight in front of frame (1+2) = 90 kg Under-frame weight (1+3) = 120 kg without ballast weight of rear wheels Under-frame weight (1+3) = 120 kg Weight in front of frame (1+7) = 240 kg without ballast weight of rear wheels Under-frame weight (2) = 96 kg Front weight (weight support + 14) = 619 kg without ballast weight of rear wheels

99 99 Speed (km/h) F (kn) Tire F (kn) Tractor Type 18, Z , , , , , , , Z 8621 Z 9621 Z 8641 Z 9641 Z , Z , Z Allowed load of pick up hitch TRANSPORTATION Tractor equipment Ballast weights (pcs) = total weight of Ballast weights - kg Front three point hitch + weight (16) = 456 kg Front PTO without ballast weight of rear wheels Weight in front of frame (1+2) = 90 kg Under-frame weight (1+3) = 120 kg without ballast weight of rear wheels Under-frame weight (1+3) = 120 kg Weight in front of frame (1+7) = 240 kg without ballast weight of rear wheels Under-frame weight (2) = 96 kg Front weight (weight support + 14) = 619 kg without ballast weight of rear wheels Front three point hitch + weight (16) = 456 kg Front PTO without ballast weight of rear wheels

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101 DRIVING THE AGRICULTURAL MACHINES Page Operating with PTO Control of front and rear PTO Rear PTO - shifting the independent and ground speed Shifting the independent speed of rear PTO PTO shaft ends Front PTO - sense of speed PTO shafts - covers Check the speed compatibility of both, tractor PTO and driven shaft of machine before attaching the machine driven by PTO (540 or 1000 RPM). Different PTO speeds may cause serious damage and accidents. 101

102 102 DRIVING THE AGRICULTURAL MACHINES OPERATING WITH PTO Take care for proper assembly of all covers and guards when working with PTO. Always reassemble the PTO shaft guard after finishing the work. Connect and disconnect the cardan shaft of attached machine only after shifting the lever of independent and ground speed into neutral position - N! Repair or clean the PTO driven machine parts only with stopped engine, disengaged clutch and after shifting the lever of independent and ground speed into neutral position N! F 146 F 147 F 148 CONTROL OF FRONT AND REAR PTO Front and rear PTO clutches are controlled electro-hydraulically. They are controlled by switches on the right cab pillar. P - Switch controls the electromagnetic valve of front PTO Z - Switch controls the electromagnetic valve of rear PTO Both PTO shafts (front and rear) are controlled after pressing both switches. Function of PTO shafts is indicated by lightening of symbols on switches. REAR PTO - SHIFTING THE INDEPEN- DENT AND GROUND SPEED PTO - PTO independent speed is shifted N - Neutral position PTO synchro - PTO ground speed is shifted (PTO speed depends upon the tractor speed)

103 103 DRIVING THE AGRICULTURAL MACHINES SHIFTING THE INDEPENDENT SPEED OF REAR PTO Independent speed of rear PTO is shifted by turning of PTO shaft end 35 mm. 1. Remove the PTO shaft end cover. 2. Release the shim. 3. Remove and return the shaft end. 4. Slide back the shaft end in the opposite direction. F 149 F 150 F 151 PTO SHAFT ENDS Speed (RPM) 540 and 1000 standard (A) 540 and 1000 standard (B) 750 and 1000 option (A) 1000 option Shaft end splines splines standard splines splines option splines splines Change of speed is not possible shaft end is not exchangeable FRONT PTO - SENSE OF SPEED Speed (RPM) Shaft end splines At tractors Z the sense of PTO speed is equal to engine speed sense (a). At tractors Z two versions of PTO speed sense are possible: a - clock wise (equal to engine speed) b - anti clock wise

104 104 DRIVING THE AGRICULTURAL MACHINES F 151a PTO SHAFTS - COVERS 1. PTO shaft cover - steel 2. PTO shaft cover 3. Front PTO shaft cover - ISO 4. PTO shaft cover 5. PTO shaft cover for trailer hitch After finishing the work protect PTO shaft by a cover.

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107 107 HYDRAULIC SYSTEM Strana Hydraulic system Hydraulic pump Hydraulic inner circuit Inner circuit control lever Control mode selection lever Response rate control lever Electro-pneumatic control of hydraulic Cab control switch Control switch on fender Use of switches Hydraulic outer circuit Max. oil capacity supplied from hydraulic outer outlets Rear outlets of hydraulic outer circuit Outer circuit control lever Control of single-acting hydraulic cylinder Control of double-acting hydraulic cylinder Control of double-acting hydraulic cylinder Outlets of front outer circuit Connection of machines and implements to hydraulic outer circuit Selective control valve Four-position section

108 108 HYDRAULIC SYSTEM HYDRAULIC SYSTEM Hydraulic system consists of inner and outer circuit. The hydraulic pump of gear type delivers the pressure oil into system. The oil for hydraulic system is used from common oil filling of gearbox and differential case. F 152 F 153 F 154 HYDRAULIC PUMP The hydraulic pump can not be disengaged. If the engine runs the hydraulic pump works. Hydraulic pump is available in two sizes: Pump Type Pump Capacity 1. UC l/min 2. UC l/min HYDRAULIC INNER CIRCUIT At tractors Z the hydraulic inner circuit is controlled by the inner circuit control lever (1), control mode selection lever (2) and response rate control lever (3). Adjustable stop (4) maintains the inner circuit control lever in the selected position (this is not valid for tractors equipped with electro-hydraulic)

109 109 HYDRAULIC SYSTEM INNER CIRCUIT CONTROL LEVER Inner circuit control lever controls: a - lifting the implement into transport position (max. lifting) b - height adjustment of three point hitch with implements when selected position control and height adjustment of tillage depth when selected draft or mixed control c - setting so called floating position when working with implement equipped with its own supporting wheel. F 155 F 156 CONTROL MODE SELECTION LEVER Lever has three positions marked by P, M, and D: P - Position control - Implement attached in the three point hitch is automatically maintained in the constant height (position) with regard to the tractor. M - Mix control - is a combination of position and draft control. This is suitable especially for tilling in soils with various resistance. D - Draft control - Implement attached in the three point hitch is automatically readjusted depending upon the change of soil resistance.

110 110 HYDRAULIC SYSTEM RESPONSE RATE CONTROL LEVER Lever controls the distributor in hydraulic valve and this divides the flow of oil to inner or outer circuit. The oil flow in inner circuit is the smallest if the lever is moved into forward horizontal position. Hydraulic response rate is reduced by restriction of the oil flow when selected draft or mix control, for example when tilling in various soil conditions. F 157 F 158 ELECTRO-PNEUMATIC CONTROL OF HYDRAULIC This is an additional control of hydraulic that enables lifting the three-point hitch into its highest position without changing the position of inner circuit control lever. This device is controlled either by electrical switch on right cab pillar (1) from driver s seat or by outer electrical switches on both ends of rear fenders (2) from outside.

111 111 HYDRAULIC SYSTEM CAB CONTROL SWITCH Cab control switch is used for lifting the implement when turning the tractor in the end of field. Pressing the switch lifts implement. Implement is lowered into previous position destined by inner circuit lever after turning the switch into off. F 159 F 160 F 161 CONTROL SWITCH ON FENDER Control switch on fender makes attaching the implement easy. Driver can handle movement of three point hitch lower links from outside. The hitch is lifted when the switch is pressed. The implement is lowered into previous position destined by inner circuit lever after releasing the switch. When the tractor is equipped witch pick up hitch do not lift the rear three point hitch by switches on fenders up to the highest position! Danger of damaging the hitch! USE OF SWITCHES Operator must stand outside the operating range of attached implement when manipulating with three-point hitch by means of electrical switches to avoid catching by implement or injury. For lifting the implement into transport position you must use the control lever of inner circuit. Move the lever into upper position. The implement must be lowered to ground when stopping the tractor with attached implement (the implement must not be left in lifted position).

112 112 HYDRAULIC SYSTEM HYDRAULIC OUTER CIRCUIT Hydraulic outer circuit delivers the pressure oil into hydraulic implements connected to hydraulic outer outlets equipped with quick-couplers. Quick-coupler sockets rear (A) and front (B) have inner diameter 12,5 mm and they correspond to the international standard ISO F 162 F 163 MAX. OIL CAPACITY SUPPLIED FROM HYDRAULIC OUTER OUTLETS Max. 12 litters of oil can be temporarily supplied from outer outlets for filling the hydraulic cylinders of attached implements. This is considered with standard oil level in transmission i.e. up to upper mark of oil dipstick and if the tractor does not work in hilly conditions. For increasing the supplied oil capacity it is possible to add up to 15 l of oil into transmission. When bigger supply of oil the transmission oil level can drop so low that the pump of hydraulic and transmission might draw in the air. In this case not only the pump and also the Hi-Lo or PTO clutch could be damaged It is necessary to pay attention when disconnecting and connecting the hydraulic quick-couplers because of residual pressure being in female or eventually male of quick-couplers. Taking ecology into consideration remove the spilt oil by a textile cloth after any disattaching the quick-couplers.

113 113 HYDRAULIC SYSTEM REAR OUTLETS OF HYDRAULIC OUTER CIRCUIT In basic version the outlets of hydraulic outer circuit are equipped with three quick-couplers. Quick-couplers No "1" and No "2" are pressurized. Pressure is in particular quick-coupler depending upon position of outer circuit control lever. The third quick-coupler No "0" is connected directly with differential case space and is intended for turning the oil from hydraulic implements (for example from rotary hydro-motors etc.). Location of quick-couplers corresponds to tractor hydraulic equipment without SCV. F 163a F 163b F 163c Location of quick-couplers corresponds to tractor hydraulic equipment with two section SCV. Location of quick-couplers corresponds to tractor hydraulic equipment with electro-hydraulic and with three section SCV.

114 114 HYDRAULIC SYSTEM OUTER CIRCUIT CONTROL LEVER Control lever has three positions marked on label. a - Pressure is in quick-coupler No "1", quick-coupler No "2" is connected with return line. Lever is moved into its rear margin position. The lever must be kept in this position otherwise it is automatically turned into neutral position "b". b - Neutral position (locked). Outlets of quick-couplers No "1" and "2" are closed and the oil is blocked in attached hydraulic implement. The lever is automatically kept by spring in this position. c - Floating (free) position. Both outlets of quick-couplers No "1" and "2" are connected with return line and the oil can freely flow in both directions. Lever is locked by valve ball lock in this position. d - Pressure in quick-coupler No "2", quick-coupler No "1" is connected with return line. Lever is moved into its forward margin position. lever must be kept in this position otherwise it is automatically turned into floating position "c". F 164 F 165 CONTROL OF SINGLE-ACTING HYDRAULIC CYLINDER Single-acting hydraulic cylinder is ever connected with quick-coupler No "1": lifting lever is in position "a" (pressure in quickcoupler No "1 ) lifting finished lever is moved to position "b" - neutral lowering lever is moved to Lowering finished position "c" - floating lever is moved to position "b" neutral Note: Picture F 165 shows location of quick-couplers in basic configuration and configuration with two section SCV.

115 HYDRAULIC SYSTEM CONTROL OF DOUBLE-ACTING HYDRAULIC CYLINDER Double-acting hydraulic cylinder is nocnected with quick-coupler No "1" and No "2 : Movement in (lever in position "a" one direction pressure in quickcoupler "1") Movement (lever in position "b" finished Movement opposite direction Movement finished in neutral) (lever in position "d" - pressure in quickcoupler "2") (lever in position "b" - neutral) Note: Picture F 166 shows location of quick-couplers in basic configuration and configuration with two section SCV. F 166 F 167 F 168 CONTROL OF DOUBLE-ACTING HYDRAULIC CYLINDER Outer circuit control lever must be moved as quickly as possible over position c" (floating position) when working with doubleacting hydraulic cylinder). Because both sides of cylinder are connected with the return line and so the uncontrolled movement of piston rod can start. 115 OUTLETS OF FRONT OUTER CIRCUIT Front outlets are assembled on panel in the front right part of tractor. Front outlets are assembled together with SCV. They are intended for work with front attached implements. Marking of outlets and their use is the same as at rear ones. A - Tractor is equipped with hydraulic equipment with SCV. B - Tractor is equipped with electrohydraulic and three section SCV. Tractor Z is equipped with electro-hydraulic and three section SCV as a standard.

116 116 HYDRAULIC SYSTEM CONNECTION OF MACHINES AND IMPLEMENTS TO HYDRAULIC OUTER CIRCUIT Connection of machines and implements combined with more parts Agricultural machines that are combined from more parts (combinators, skids, and harrows), are often equipped with outer frames which are hinged to the middle frame. This configuration needs to control folding of outer frames. These outer frames are folded by independent hydraulic cylinders. For folding, cylinders are connected with outer circuit of tractor hydraulic. When working with such implement it is necessary to control folding of outer frames by raising the control lever of outer circuit upward. Moving the control lever upward ensures that the pressure oil in quick-coupler "1" lifts frames to vertical (transport) position. Quick-coupler "2" is connected with drain. Connection of rotary hydromotor If the rotary hydromotor is connected with hydraulic outer circuit, the oil return line must be ever connected with quick-coupler "0". Connection of reversible hydromotor If the reversible hydromotor is used the oil lines must be connected with quickcouplers "1" and "2". In this case both lines must be equipped with relief valves which will limit the pressure peaks when stopping the machine. The oil return line from these valves is connected with quick-coupler "0".

117 117 HYDRAULIC SYSTEM SELECTIVE CONTROL VALVE The SCV is intended for attached agricultural machines that need the separate control of two hydraulic equipment. The SCV is located on the left-hand side of tractor underneath the cab and is equipped with four-section valve having a floating position. Selective control valve is either twosection or three-section type. F 170 F 171 F 172 Control levers of SCV sections (A) are located on the right rear fender. Front outlets of outer circuit (B) or rear outlets of outer circuit are assembled together with selective control valve (C). Selective control valve with two sections is assembled on tractors with mechanical control of hydraulic, each of them is with four-position version.

118 118 HYDRAULIC SYSTEM Selective control valves with three sections are assembled on tractors equipped with electro-hydraulic, each of section is with four-position version. F 173 F 173a F 173b FOUR-POSITION SECTION 1 Rear margin position Pressure oil flows to quick-coupler "4" or "6" 2 Middle position neutral (blocked) 3 Front margin position Pressure oil flows to quick-coupler "3" or "5" Lever returns automatically to middle position. 4 Control lever can be moved forward through position III to position IV by increased force. Floating position (free). Both quickcouplers "3" and "4" or "5" and "6" are connected with return line. At two-section SCV the floating position is in a margin position of control lever opposite to outer circuit of regulation hydraulic. The first (right) section of SCV is equipped with hydraulic lock in pressure positions. A - At two-section SCV this is a section controlling quick-couplers 3 and 4. B - At three-section SCV this is a section controlling quick-couplers 1 and 2.

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121 121 ELECTRO-HYDRAULIC Page Schema of electro-hydraulic, EHR 4 - Bosch Location of electro-hydraulic control panel Function of control elements Pump capacity Device is switched off Cancellation of blocking Fast lowering Transportation of implements Stop position Limiting the upper position of three point hitch Field operation Floating position Use of rear outer control Buttons of hydraulic rear outer control...127

122 122 SCHEMA OF ELECTRO-HYDRAULIC, EHR 4 - BOSCH Hydraulic pump (1) delivers oil into the selective control valve (2) from this into the regulation distributor (3). Distributor controls cylinders of hydraulic arms (4,5). Hydraulic arms are linked with lower lifting links of three point hitch. Agricultural implement attached in the three point hitch is lifted, lowered or kept in the desired position with regard to the tractor. Electronic control unit (6) receives signals from tensometer pins (7) and (8) by electrical way. These signals are compared with the required value that is set in the control panel (9). Comparing the required and real value brings the regulation deviation that is transferred into regulation distributor (3). This distributor is controlled by means of two proportional electro-magnets. Lifting and lowering is independent on the load. ELECTRO-HYDRAULIC F 174

123 ELECTRO-HYDRAULIC LOCATION OF ELECTRO-HYDRAULIC CONTROL PANEL Electro-hydraulic control panel (1) is located on the upper part of right fender. It replaces the control levers of mechanical hydraulic regulation (inner circuit). Function of hydraulic outer circuit is secured by three-section SCV controlled by three levers located on upper part of fender (2). F 176 F 177 FUNCTION OF CONTROL ELEMENTS 1. Lifting control lever has 4 positions: a - transport, lifting b - stop position c - regulation, lowering d - free place, fast lowering (springs returns the lever back to position c). 2. Blocking in transport position. 3. Speed of lowering 0...max. 4. Setting the desired value of lifting device. 5. Limiting the upper position. 6. Regulation sensitivity 7. Mixing of regulations. Fluent setting from draft to position control. 8. Optical indication of lifting. 9. Optical indication of lowering. 123 PUMP CAPACITY Tractor with EHR BOSCH is equipped with pump UC 20 with maximal delivery 60 l/min or UC 25 with maximal delivery 70 l/min. Maximal pressure in hydraulic system with EHR BOSCH, maintained by relief valve is 21 MPa.

124 124 ELECTRO-HYDRAULIC DEVICE IS SWITCHED OFF The key of key switch switches off the electrical system. Electronics is switched off and lifting device is blocked. F 178 F 179 F 180 CANCELLATION OF BLOCKING After switching on of the electrical system by key switch, the lifting device is still blocked. The lifting device neither lifts nor lowers. Cancel blocking by moving the lifting lever (1) into position "a" (short movement is sufficient) when the electrical system is switched on and engine is running. After returning the lever (1) into position "c the three point hitch is moved into position corresponding to setting the elements.

125 125 ELECTRO-HYDRAULIC FAST LOWERING Lever (1) is in position "d" - free position. You must keep the lever in this position. After releasing, the lever returns into position "c" regulation where the system is in floating position. F 181 F 182 F 183 TRANSPORTATION OF IMPLEMENTS Move the lifting lever (1) into position "a" and lock it by lock lever (2). STOP POSITION After moving the lever (1) into position "b" - stop position, the movement of three point hitch is immediately stopped.

126 ELECTRO-HYDRAULIC LIMITING THE UPPER POSITION OF THREE POINT HITCH The upper position of three point hitch is limited by lever (5). Limiting of upper position can be realized in the upper half of three point hitch lift. F 184 F 185 F 186 FIELD OPERATION Do actions according to the article Cancellation of blocking and set the desired position of elements depending upon character of operation. The control element (4) serves for setting the depth of implement. Use the control element (6) for setting the sensitivity of system. Symbol of maximal sensitivity Symbol of minimal sensitivity Use control element (7) for setting the regulation control mode and for control mode mixing. 126 Symbol of draft control Symbol of position control Action of regulation (lifting and lowering) can be indicated by means of indicator diodes (8) and (9). When turning the tractor in the end of field, move the lever (1) into position "a". After turning the tractor set again the position c. Regulation system returns into the previous operating position (memory of tillage). Control element (3) serves for setting the desired speed of lowering. In position "0" the three point hitch does not lower!

127 ELECTRO-HYDRAULIC FLOATING POSITION Position of control element (4) under mark "F" and position of control element (7) at symbol serves for the permanent work with floating position of hydraulic, for example when working with plough and supporting wheel. USE OF REAR OUTER CONTROL Rear outer control serves only for attaching and disattaching the agricultural implements. Symbols for marking of buttons correspond to the sense of moving the three-point hitch after pushing buttons. Movement of three-point hitch takes only the time when the button is pressed. There is not a limitation of upper position saved by regulation system when the rear control is used. Lifting is F 187 F 188 F 189 limited by a mechanical stop (by stop on lift cylinder). Rear control must not be used in the upper part of three point hitch movement. Each use of rear control causes the repeated blocking of regulation system and it is necessary to repeat Cancellation of blocking see chapter Cancellation of blocking. 127 BUTTONS OF HYDRAULIC REAR OUTER CONTROL 1. lifting 2. lowering Movement of three-point hitch takes only the time when the control button is pressed. Operator must stand outside movement range of attached implement when manipulating with three point hitch by buttons to avoid grabing by implement.

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133 133 HITCHES Page (A) rear three point hitch (b) rear three point hitch with hook ends - cbm Safety regulations for working with three point hitch Attaching machines to three point hitch Attaching machines to three point hitch with cbm hooks Locking the side swing of lower links Telescopic lower draft links Top link Top link Selection of top link position Front three point hitch Control of front three point hitch Adjusting the back throttle valve Attaching the carried implements, eventually weights of front three point hitch Mechanical lock of front three point hitch Driving with agricultural machines attached in front three point hitch Front three point hitch for z forterra Control of front three point hitch Regulating and hydraulic lock of front three point hitch Setting the throttle valve Attaching the carried implement Driving with agricultural machines attached in front three point hitch

134 134 (A) REAR THREE POINT HITCH Rear three point hitch is intended for attaching the carried or semi-carried agricultural machines and implements with hitch points of category II according to ISO regulation. The center distance of lower link joint balls is 870 mm. The inner opening of lower link ball is 28,5 mm. The inner opening of top link ball is 25,5 mm. 1. Top link 2. Left lift link 3. Right lift link 4. Lower draft links (B) REAR THREE POINT HITCH WITH HOOK ENDS - CBM Reinforced three point hitch CBM with hook shaped ends is assembled as a standard on tractors Z Hitch is intended for attaching the carried or semi-carried agricultural machines and implements with hitch points of category II according to ISO regulation. Diameter of lower pins is 28,5 mm. Diameter of top link pin is 25,5 mm. 5. Top link 6. Left lift link 7. Right lift link 8. Lower draft links 9. Movable collar with handles HITCHES F 191

135 135 HITCHES SAFETY REGULATIONS FOR WORKING WITH THREE POINT HITCH Non authorized persons who are not charged to handle with implements attached to tractor must not be left between tractor and attached implement - (A). Do not park the tractor with implement in lifted position - (B). F 192 F 193 ATTACHING MACHINES TO THREE POINT HITCH The left lift link (1) is intended for course vertical adjustment of lower link position and is adjustable after disconnecting its upper end from lift arm pin. Fine adjustment is carried out by turning the tube of right lift link (2) with handle. Lower link ends can be mutually vertically adjusted within range 200 mm. Floating (free) position of implement and swinging round the axis is enabled after moving the pin (3) into the lower opening (4). In this case the lower draft link ends can be freely vertically moved by 100 mm one to each other. Lower link stabilizers (5) serve for limiting the side to side swing of lower links. The side swing of lower links can be max. 100 mm to each side from middle position when connected the implement of category II (125 mm at reinforced three point hitch). The side swing can be limited by locking of stabilizers.

136 136 HITCHES ATTACHING MACHINES TO THREE POINT HITCH WITH CBM HOOKS Lower and upper links of hitch are equipped with semi-automatic ends -CBM. They serve for easy, two-phase attaching and disattaching the implement to the three point hitch without necessary direct action of the driver. They are operated by means of cables from the driver s place. Lower links are attached to the implement within the first phase at reverse move and by subsequent lifting the three point hitch. Top link of three point hitch is attached by the driver from the cab within the second phase. The top link is assembled in one from four openings of the support. First the implement must be equipped with attaching balls-cbm and the length of hitch axis must be adjusted with adjustable spacer (at reinforced three point hitch only). At tractors equipped with reinforced three point hitch CBM, the fine adjustment is carried out by moveable collar with handles. The collar of lift link must be ever set with handles in direction of driving after adjusting the length. F 194 F 195 LOCKING THE SIDE SWING OF LOWER LINKS Insert the pin (1) into opening II (implement of category II) or into opening I (implement of category I). Hitch is set in the middle position. Fine adjustment of hitch can be done by means of bolt (2). Blocking the side swing of links is done when transporting the implement or when working with machines which need precise towing behind the tractor. At reinforced three point hitch the stabilizers can be adjusted within their whole range by rotating the collar.

137 137 HITCHES Both stabilizers must always be assembled on the tractor. Both must be set by the same way with the same position of pins either both blocked or both unblocked. Do not adjust the rear wheel tread less than 1500 mm when working with implement of category II that needs the side swing (for example plough), avoid collision of lower links with tires. Lower draft links have to be connected by springs and the top link hooked in the spring holder when transporting without implement. F 196 F 197 TELESCOPIC LOWER DRAFT LINKS Telescopic lower links make attaching the implement easy. Telescopic draft link ends (2) are loosened after pushing the latches (1) down. Slipped out draft link ends are fitted onto both pins of implement and are locked by quick lock pins (3). Pins are located in holder on telescopic link - (A). Draft link ends are slid into draft links after reverse movement and are automatically locked in working position - (B).

138 138 HITCHES TOP LINK Top link (1) is length adjustable within range 270 mm. This is attached to the tractor into one from four openings of support (2), that transfers impulses (senses) from attached implement to the torsion shaft located in hydraulic rockshaft. Tractor equipped with electro-hydraulic has the rigid bracket (A) with two openings only. F 198 F 199 F 199a TOP LINK Pay attention to keep the same length of joints screwed out from the link tube when prolonging the top link. SELECTION OF TOP LINK POSITION Attachment of top link into one from openings 1-4 influences the following: - sensitivity of hydraulic response (control mode selection lever in position "D" or " M"). The biggest response sensitivity is with top link in the opening "1". - tilting the agricultural Implement when being in lifted position with regard to the height of implement frame (460 mm mm). The smallest tilting is with top link in the opening "1".

139 139 HITCHES FRONT THREE POINT HITCH Front three point hitch is intended for attaching the front carried agricultural machines and implements of category II according to ISO standard. It is assembled on tractors with front driving axle. Maximal lifting force of front three point hitch is 12 kn Within the implement transportation the front three point hitch must always be locked mechanically in lifted position. Note: This mechanical lock is recommended even in case that no implement is attached in the three point hitch F 200 F 201 F 202 CONTROL OF FRONT THREE POINT HITCH Front three point hitch is equipped with two single-acting cylinders that are controlled by oil from hydraulic outer circuit (quick-coupler "1"). Lifting and lowering is controlled by lever of outer circuit (1) lever position "a, b, c". Do not use the lever position "d" when working with front three point! Lowering speed of hitch with implement can be controlled by back throttle valve (2). ADJUSTING THE BACK THROTTLE VALVE Adjusting the throttle valve is recommended before starting the operation with attached implement in front three point hitch that way the time needed for implement lowering from the upper position is 1 to 1,5 second. Turning the valve body into left (in arrow direction) increases lowering speed.

140 140 HITCHES ATTACHING THE CARRIED IMPLE- MENTS, EVENTUALLY WEIGHTS OF FRONT THREE POINT HITCH The implement is attached into the front three point hitch forks and is locked by pins. A - pins in upper position swing of implement is assured ± 8 B - pins in lower position when transporting in hilly terrain or on the road, eventually with attached ballast weights. Vertical position of pins locks the pins. Pins can be removed after turning by 90 o to horizontal position. F 203 F 204 F 205 MECHANICAL LOCK OF FRONT THREE POINT HITCH Mechanical lock of front three point hitch is carried out by means of lock pins (1) and double opening support welded on lower links (2). Front three point hitch is locked in max. upper position. Transversal tube of front three point hitch support serves for fixing the upper end of implement springs. Springs unload the front attached agricultural implement. DRIVING WITH AGRICULTURAL MA- CHINES ATTACHED IN FRONT THREE POINT HITCH Reduce the travel speed of tractor when going with agricultural machines attached in the front three point hitch to 20 km/h. We recommend to drive with engaged front driving axle at 4WD tractors which are not equipped with cardan brake.

141 HITCHES FRONT THREE POINT HITCH FOR Z FORTERRA Front three point hitch is intended for attaching the front carried agricultural machines and implements of category II according to ISO standard. Maximal lifting force of front three point hitch is 24 kn. Only rounded ballast weights can be attached in this type of three point hitch. Within the implement transportation the front three point hitch must always be locked hydraulically in lifted position; by ball valve. This valve is located on the left-hand side of tractor, above the front axle. This hydraulic lock is recommended even in case that no implement is attached in the three point hitch. F 206 F 207 F 208 CONTROL OF FRONT THREE POINT HITCH Front three point hitch is equipped with two double-acting cylinders that are controlled by oil from SCV. Lifting and lowering is controlled by lever of SCV (1): - moving into position 4 makes lifting - moving into position 3 makes lowering - position F serves for floating position - position N serves for locking the hitch 141 REGULATING AND HYDRAU- LIC LOCK OF FRONT THREE POINT HITCH The throttle valve can regulate lowering speed of the hitch with implement. Hydraulic lock of front three point hitch is carried out by ball valve in any position of hitch. Ball valve is turned from position A by 90 (perpendicularly to valve axis) to position B.

142 142 HITCHES SETTING THE THROTTLE VAL- VE Before starting the work with implement attached in front three point hitch it is recommended to set the throttle valve (3) that way the time needed for implement lowering from the upper to the lowest position is 1 to 1,5 sec.. Turning the valve body into left (in arrow direction) increases the speed of lowering. F 209 F 210 F 211 ATTACHING THE CARRIED IMPLEMENT The implement is attached into the front three point hitch forks and is locked by pins. Fixed and floating position is provided by pins: - fixed position of attached implement is provided by assembly of pins into position 1 - floating position of attached implement is provided by assembly of pins into position 2 DRIVING WITH AGRICULTU- RAL MACHINES ATTACHED IN FRONT THREE POINT HITCH Reduce the travel speed of tractor when going with agricultural machines attached in the front three point hitch to max. 15 km/h. We recommend removing the lower lifting arms (1) from supports at tractor equipped with front three point hitch if not used for attaching the implement. Front lower links are disassembled after removing the safety pins and hitch pins (2).

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145 145 WHEEL TREAD SETTING Page Blocking and unblocking the front axle knees (extensions) Setting the front wheel tread at non-driven axle Setting the front axle knees (extensions) Possible wheel treads at front driving axle of tractors Z 8641, Z 9641, Z and Z Front wheel toe-in at non-driven axle Front wheel toe-in at driven axle Front wheel toe-in at front axles (non-driven, driving) Setting the wheel stops at front driving axle Change of rear wheel tread Rear wheel tread setting

146 146 CHANGE OF WHEEL TREAD SPRUNG AXLE KNEES (EXTENSIONS) BLOCKING AND UNBLOCKING THE FRONT AXLE KNEES (EXTENSIONS) Blocking: - Unscrew the plug (1). Safe it for assembling at later unblocking. - Screw down the stop tube (3) with lock washer (4) into the thread hole of spring bushing (2) instead of plug. Insert the screw M 10x1,25 (5) into the stop tube and screw it down into the nut (6). This nut is inside of rubber spring (7). The spring (8) is out of function by this way and the knee is blocked. Unblocking the front axle knee is done by the opposite way. After blocking and unblocking the front axle knees check the front wheel toe-in. F 263 F 264 Block and unblock the sprung axle knee in loaded status only (by the own weight of tractor). Kingpin of wheel is shot up by the force of spring after unblocking the unloaded axle knee. Disassemble the bushing of spring only if the sprung knee needs to be completely disassembled. Because the special tool must be used for disassembling let to do this job in a specialized workshop.

147 147 CHANGE OF WHEEL TREAD SETTING THE FRONT WHEEL TREAD AT NON-DRIVEN AXLE The front wheel tread can be set to the following values at tractors Z 8621, Z 9621: 1425 mm 1500 mm 1800 mm Front wheel tread setting is provided by sliding out and in the front axle knees when front axle is lifted. Front treads are increased by 18 mm when front brakes are assembled. F 212 F 213 SETTING THE FRONT AXLE KNEES (EXTENSIONS) First of all fix the tractor against possible movement, lift the axle by lifting jack and support it. - Thread out axle knee nuts and remove the screws (1). - Loosen the lock nuts (2) at screws of steering rod bushings and remove screws (3). - Slide out or in the knees to the required tread, reassemble screws. Tighten axle knee nuts by torque Nm. - Secure steering rods by screws and lock nuts in corresponding positions. - First tighten screw (3) by torque Nm with totally loosened nut up to screw head and subsequently tighten the lock nut (2) by torque Nm. - Check for the toe-in of front wheels.

148 CHANGE OF WHEEL TREAD POSSIBLE WHEEL TREADS AT FRONT DRIVING AXLE OF TRACTORS Z 8641, Z 9641, Z AND Z Tires 12, , , ,9-24 Front wheel treads (mm) Rim position Changing of rim and disc position sets the wheel tread. First of all fix the tractor against possible movement, lift the axle by lifting jack and support it. - Unscrew nuts of bolts connecting the disc with rim and remove screws with washers. - Change the wheel tread by setting the rim into the required position. - Reassemble screws with washers and lock them by nuts. Tighten nuts by torque Nm. - Retighten screws to the prescribed level after each loosening of rim connection. - Retighten connections again to the prescribed torque after driving the distance 100 m with unloaded tractor. - Retighten connections after 3 hours with loaded tractor standard tread Recommended treads are highlighted in bolts Tighten nuts of front wheels by torque Nm. 148

149 149 SETTING THE FRONT WHEEL TOE-IN FRONT WHEEL TOE-IN AT NON- DRIVEN AXLE Correct toe-in of front wheels is 3 to 9 mm at tractor with non-driven axle. Check and eventually adjust the play of front wheel bearings before toe-in checking. Inflate tires to the prescribed pressure. Front wheel toe-in is measured on sides of tires. The toe-in "S" is calculated as a difference of measured values: S = B A (or S = b - a). FRONT WHEEL TOE-IN AT DRIVEN AXLE Correct toe-in of front wheels is 0 up to 2 mm at tractor with driving axle. Front wheel toe-in is measured on front wheel hubs (if assembled wheels the wheel toe-in can be measured on rims). F 214

150 150 SETTING THE FRONT WHEEL TOE-IN FRONT WHEEL TOE-IN AT FRONT AXLES (NON-DRIVEN, DRIVING) - Turn the steering wheel between both margin positions so to have a lever of hydrostatic steering aligned with the longitudinal axis of tractor. - Loosen lock nuts of steering rod joints - Measure the distance between outer or inner sides of tires in front in the horizontal plain of wheel axis. Mark the measuring points. - Drive the tractor so that the marked points will be in rear horizontal position (turned by 180 ) and again measure the distance between marked points - Set the steering rods so to receive after setting the following differences measured in front and rear: - at non-driven axle 3 to 9 mm (A) - at driving axle 0 to 2 mm (B) - Maximal difference of turns at both steering rods can be 1 turn taking the starting position into consideration after setting the toe-in. - Screws for setting the tread must be in downward after setting the toe-in. - Surfaces of joins with grease nipples must be parallel at setting. - Tighten the lock nuts of ball joints by torque Nm. F 215

151 151 SETTING THE WHEEL STOPS Without front three point hitch Without fenders With fenders Tires Wheel tread (mm) Right stop A (mm) Left stop A (mm) Right stop A (mm) Left stop A (mm) 12,4- R /70R24 13,6-R ,4-28,10PR 14, /70R24 With front three point hitch Without fenders With fenders Tires Wheel tread (mm) Right stop A (mm) Left stop A (mm) Right stop A (mm) Left stop A (mm) 12,4-R /70R24 13,6-R , ,10PR 14, /70R F 216 SETTING THE WHEEL STOPS AT FRONT DRIVING AXLE Set stops at each change of front wheel tread according to the mentioned tables after loosening the nut (2) and treading out or in the screw (1).

152 152 CHANGE OF WHEEL TREAD CHANGE OF REAR WHEEL TREAD On the base of rear tire dimension, the rear wheel tread can be set within the following range: Rear tire dimension 18, /70R38 520/70R38 16, , ,4-34 Wheel tread (mm) The rear wheel tread can be set by 75 mm and is done by changing the position of rim and disc. F 217 F 218 REAR WHEEL TREAD SETTING The rear wheel treads are adjustable by step 75 mm and are set by changing the rim and disc position. Tread setting is done with lifted tractor rear part to enable free turning of rear wheel. Don t forget to block front wheels against movement before lifting. Tighten all screws connecting the disc and rim by torque Nm and nuts of studs connecting the disc and shaft by torque Nm after tread setting. - Retighten screws to the prescribed level after each loosening the rim connection. - Retighten connections again to the prescribed torque after driving the distance 100 m with unloaded tractor. - Retighten connections after 3 hours with loaded tractor - After 10 hours again check tightening of disc nuts and rim connections. - Up to operating the first 100 hours check tightening of disc nuts and rim connections at front and rear wheels frequently (minimally 6-times within first 100 hours). - Farther after each 100 hours recheck tightening of disc nuts and rim connections at front and rear wheels.

153 NOTE 153

154 NOTE 154

155 BALLAST WEIGHTS Page Front ballast weights Ballast weights of front three point hitch Rear wheel ballast weights Bottom ballast weights of tractors z Front ballast weights of tractors z Valve for filling tires with liquid Filling the liquid into tires Draining the liquid from tires Blocking front wheels Max. liquid weight depending upon tire size Ballast weights are necessary for increase of axle load, for ensuring the tractor steering-ability or stability (keep manufacturerřs instructions when working with front loader). 155

156 156 BALLAST WEIGHTS FRONT BALLAST WEIGHTS Under frame ballast weights (1) Combination of weights (PCs) Weight (kg) 1+3 1x30 + 3x Ballast weights in front of frame (2) Combination of weights (PCs) Weight (kg) 1+2 1x30 + 2x x30 + 5x x30 + 7x F 219 F 220 F 221 BALLAST WEIGHTS OF FRONT THREE POINT HITCH Weights (1) Combination of Weight weights (PCs) (kg) Support+12 Support 8+12x21 Rounded weight (2) Combination of Weight weights (PCs) (kg) Support +16 Support 8+16x Ballast weights with support are attached in the front three point hitch lower links These weights are intended for assuring of longitudinal stability when the heavy implement is attached in the rear three point hitch. Only rounded ballast weights can be assembled in front three point hitch of tractors Z

157 157 BALLAST WEIGHTS REAR WHEEL BALLAST WEIGHTS Combination of weights (PCs) Weight (kg) 2+4 2x25 + 4x x25 + 6x x x F 222 F 223 F 224 BOTTOM BALLAST WEIGHTS OF TRACTORS Z Bottom ballast weights Combination of weights (PCs) Weight (kg) 2 2x34 68 Bottom ballast weights are assembled into the cavity in front frame casting piece. They are accessible after disassembling the battery holder. FRONT BALLAST WEIGHTS OF TRACTORS Z Front ballast weights Combination of Weight weights (PCs) (kg) Support + 14 Support 45+14x Front ballast weights of canister type are hanged to support. They are locked against side movement by pin put between middle canisters. The other ballast weights are fixed by two holders to the middle ones. Note: Front ballast weights with support can be used as a front hook for emergency towing of tractor after inserting the pin.

158 158 FILLING LIQUID INTO TIRES VALVE FOR FILLING TIRES WITH LIQUID All rear wheel tubes are equipped with valve that enables filling tires with liquid when the adapter is used. Filling of front tires and rear tires double assembly with liquid is not allowed. F 225 F 226 FILLING THE LIQUID INTO TIRES - Unload the tire by lifting the tractor and turn it with the valve upward (A). - Deflate the tube and remove the valve insert. - Thread the adapter for filling the tires with water and slide the water hose over adapter. Fill the tube with prescribed quantity of liquid. The tank (B) or pressure water(c) can be used for filling the tire. - Remove the water hose and adapter. - Thread the valve insert and inflate tire into prescribed inflation pressure (D). - Thread the valve dust cap after inflation. - Fill the second tire by the same way.

159 159 FILLING LIQUID INTO TIRES DRAINING THE LIQUID FROM TIRES - Unload tire by lifting the tractor and turn it with valve upward (A). - Deflate the tube and remove the valve insert. Turn the wheel with valve downward. Depressure can be created in tire when draining the liquid. That s why turn sometimes the wheel with the valve upward (B). - Remove the rest of liquid from tire by means of pressure air after assembly of adapter for filling the tires with water (C). Blow out the liquid so long until liquid runs from adapter extension tube. - Remove the adapter for filing the tires with water. Thread the valve insert back and inflate the tire into prescribed inflation pressure (D). - Thread the valve dust cap after inflation. - Remove liquid from the second tire by the same way. F 227 F 228 BLOCKING FRONT WHEELS Do not forget to block front wheels against movement before lifting the rear wheels.

160 160 MAX. LIQUID WEIGHT DEPENDING UPON TIRE SIZE FILLING LIQUID INTO TIRES Tire size Filling 75% Clear water (l), (kg) Solution of calcium chloride CaCl 2 (kg) water (l) Additional load (kg) 16, , , ,4R /70R , /70R Values mentioned in table are for temperature of freeze - 30 C. Preparation of liquid: 1. Dry calcium chloride CaCl 2 is added into water, never the other way! 2. Liquid is not dangerous, but it must be handled carefully. Wash the spilt liquid drops with clean water. 3. Let the liquid cool down before filling. Keep the prescribed quantity of hydrated lime. 4. Liquid must not get into contact with metal parts and with electrical installation. Tube valve is liquid resistant. 5. Antifreeze liquid prepared in this consistency must not be used in cooling system. 6. Remove the antifreeze as a special waste after draining Note: Volume of mixture in the tube corresponds to filling up to valve level. Antifreeze can be prepared either by means of calcium chloride CaCl 2 or magnesium chloride MgCl 2. Quantity 0,40 kg CaCl 2 per 1 l of water safes tire up to temperature - 30 C (0,3 kg /l safes tire up to temperature - 20 C, 0,2 kg /l safes tire up to temperature - 15 C). Quantity 0,55 kg MgCl 2 per 1 l of water safes tire up to temperature - 30 C.

161 NOTE 161

162 NOTE 162

163 Driver alone can do almost any work on planned technical maintenance. If you donřt have sufficient technical equipment let to do more complicated work in the authorized service Any work in connection with cleaning, lubrication and adjustment of tractor or implemented machine must be done only after stopping the engine and the other moving parts, except inspection of brake and charging. MAINTENANCE INSTRUCTIONS Page Disassembling the side shield Tilting the hood Disassembling the front grill Lubrication schema of turbocharged engine Lubrication schema of six cylinder engine Inspecting the engine oil level Draining the engine oil Changing the full-flow cleaner of engine oil Filling the engine oil Changing the fuel cleaner cartridge Changing the fuel course cleaner Bleeding the fuel system Maintenance of air cleaner Regeneration of main air filter element Changing the safety element Reassembling the elements Position of dust valve Tightness of cleaner Changing the cleaner element of hydrostatic steering Bleeding the hydrostatic steering system Changing the hoses of hydrostatic steering Changing the coolant Changing and inspecting the transmission oil Draining openings and plugs After draining the oil Lubricating and filling points of front driving axle Gearbox of front PTO Filling up the brake fluid Sprung knees of front axle Cleaning the heating filters Maintenance of airconditioning Draining the condensed water from air tanks Checking the leakage of air system

164 164 MAINTENANCE INSTRUCTIONS Page Operating pressure of air brakes Tire maintenance Inflating the tires Recommended tire inflation pressure for front wheels wd tractors Recommended tire inflation pressure for front wheels wd tractors Recommended tire inflation pressure for rear tires Tires for non driven wheels Tires for driving wheels Tires for driving wheels Tractor storage

165 165 MAINTENANCE INSTRUCTIONS DISASSEMBLING THE SIDE SHIELD Right and left side shield can be removed from the tractor after unlocking of two lock pins (1). F 229 F 230 F 231 TILTING THE HOOD 1. Remove the left side shield (1) 2. Loosen the latch (2) locking the hood. 3. Secure the hood in tilted position by a strut (3). DISASSEMBLING THE FRONT GRILL 1. Tilt the hood. 2. Unlock two spring pins from pins of front grill inserted in front cross member. 3. Loosen the front grill from the bonnet (by pulling forward). 4. After disconnecting the electrical wiring harness the front grill can be fully removed from the tractor.

166 166 MAINTENANCE INSTRUCTIONS LUBRICATION SCHEMA OF TURBO- CHARGED ENGINE Lubrication schema is valid for engines of tractors Z Z Forterra turbo. 1. Suction strainer 2. Oil pump -GEROTOR 3. Reduction valve 4. Full-flow oil filter 5. Main oil channel 6. Pressure switch 7. Filler 8. Oil dipstick 9. Oil draining plug 10. Lubrication of compressor 11. Lubrication of turbocharger F 232

167 167 MAINTENANCE INSTRUCTIONS LUBRICATION SCHEMA OF SIX CYLINDER ENGINE Lubrication schema is valid for six cylinder engine of tractor Z Forterra. 1. Oil pump with reduction valve 2. Oil filter 3. Main oil channel 4. Spraying nozzle for cooling the piston 5. Lubrication outlet 6. Oil channel for lubrication of rocker arms F 233

168 168 MAINTENANCE INSTRUCTIONS INSPECTING THE ENGINE OIL LEVEL Daily inspect the oil level before starting the work. Inspect the oil level with tractor in horizontal position. Remove the oil dipstick (1) wipe it with cloth and thread it. The oil must not be under lower dipstick mark after repeated removing the dipstick. Add the oil into filler (2) if needed. F 234 F 235 F 236 DRAINING THE ENGINE OIL Drain the oil by removing the draining plug. Drain it immediately after stopping the tractor or after preheating the engine to working temperature. Clean the draining plug before reassembling. Check for the good status of sealing ring. CHANGING THE FULL-FLOW CLEANER OF ENGINE OIL The engine oil cleaner is exchanged ever when changing the engine oil. Before assembling a new cleaner clean the sealing area of cleaner support (2) and cleaner body (1). Coat the rubber sealing by the same oil you will fill into the engine. Assemble the new cleaner and tighten it by hand. Tighten again the oil cleaner by 3/4 to 1 1/4 turns after touching sealing to block. Check the cleaner for leakage after starting the engine.

169 169 MAINTENANCE INSTRUCTIONS FILLING THE ENGINE OIL Fill the prescribed quantity of oil into the filler (1). Start the engine and let it run 2 to 3 minutes at 750 to 800 RPM. Inspect the oil level by dipstick (2) after stopping the engine and stabilizing the engine oil level. Inspect for oil leakage of oil cleaner, draining plug and other fittings. F 237 F 238 F 239 CHANGING THE FUEL CLEANER CARTRIDGE Exchange the fuel cleaner cartridge after releasing the nut (1) and removing the bowel (2). Check for the proper bowel sealing position at reassembling the cleaned bowel with the new fuel cleaner cartridge. Bleed the fuel system. Put the suitable vessel under the engine before exchanging the fuel cleaner cartridge to ketch dropping fuel from the cleaner. CHANGING THE FUEL COURSE CLEANER Remove the ring nut (1) and the fuel cleaner bowel (2) with sealing and strainer. Clean the bowl and strainer in diesel fuel. Check the right position of sealing when reassembling the fuel cleaner bowl, before tightening the ring nut. Bleed the fuel system.

170 170 MAINTENANCE INSTRUCTIONS BLEEDING THE FUEL SYSTEM Put the suitable vessel under the engine before bleeding to ketch dropping fuel from the cleaner and injection pump. Proceed by the following way: - Prime the fuel system by several strokes of hand priming pump (1). - Loosen the screw of fuel cleaner input fitting (2) and let the foam escape. - Retighten the screw (2) and repeat the process until the clean foam-free fuel fluently leaks after loosening the screw. - Bleed the injection pump by the same way by means of screw located on injection pump case (3) F 240 F 241 MAINTENANCE OF AIR CLEANER Maintenance of air cleaner must be done after indication of clogging by clogging indicator (the red indicator lamp on dashboard is ON) or minimally once per year. Maintain the air cleaner after tilting the hood of bonnet. 1. Remove the dust reservoir (1) with dust valve (2) and clean both properly 2. Disassemble the main cartridge element (3).

171 171 MAINTENANCE INSTRUCTIONS REGENERATION OF MAIN AIR FILTER ELEMENT If the main air filter element is not damaged (dust on the inner side of air filter element must not be appeared) do regeneration by pressure air of max. pressure 700 kpa blown from the inner side of element. The main air filter element can be regenerated maximally three times by this way. The main air filter element needs to be replaced once per year. F 242 F 243 F 244 CHANGING THE SAFETY ELEMENT Inner safety air filter element can not be regenerated. It must be exchanged in the following cases: - if the main air filter element is damaged - after 5th maintenance of air cleaner - minimally once per two years REASSEMBLING THE ELEMENTS Be careful when reassembling the air filter element to: - keep the contact surfaces clean - air filter elements must not be deformed after assembly - neither elements nor paddle wheel partition must vibrate after assembling - rubber sealing must be fitted properly round the complete circumference of dust reservoir.

172 172 MAINTENANCE INSTRUCTIONS POSITION OF DUST VALVE After assembling the elements close the cleaner by dust reservoir that must be assembled that way the dust valve is downward. F 245 F 246 TIGHTNESS OF CLEANER After assembling the rubber sealing tighten the nut that way to press the sealing on the curtain by dust reservoir and so safe the tightness of complete cleaner.

173 173 MAINTENANCE INSTRUCTIONS CHANGING THE CLEANER ELEMENT OF HYDROSTATIC STEERING 1. Remove the tractor front grill. 2. Remove the battery. 3. Put the suitable vessel under the hydrostatic steering tank. 4. Loosen the draining plug 5. Drain the oil from tank. F 247 F 248 F Remove the oil tank cap 7. Remove the cleaner element. 8. Install the new cleaner element 9. Remove both hoses (1, 2)from steering cylinder and put them together with return line hose into vessels for the old oil. 10. Start the engine and turn the steering wheel twice or three times into both directions at low engine idle run (max. 10 seconds) to remove the oil from the steering unit. 11. Fix the tractor against movement and lift the front axle. 12. Put a vessel for the old oil under the steering cylinder and remove the oil from cylinder by turning of wheels (by hand). 13. Reassemble all disconnected fittings. 14. Fill the tank by oil and bleed the hydrostatic steering circuit.

174 174 MAINTENANCE INSTRUCTIONS BLEEDING THE HYDROSTATIC STEERING SYSTEM - Start the engine and let it run for 1 minute at low idle. - Turn the steering wheel several times to both directions (A) at engine low idle run. - At engine max. speed turn the steering wheel three times alternatively slowly and quickly to both directions up to wheel stops (A). - Stop the engine and lower the front wheels to the ground. - At 2WD tractors loosen the bleeding plug located in the upper cover of steering cylinder (this is necessary for filling the circuit of hydrostatic steering by fresh oil) and after draining oil tighten the plug. The plug is accessible after sliding out the battery and battery support (B). F 250 F 251 At all actions within bleeding look at the oil level in tank to avoid aerating of steering system. After bleeding check and eventually add the oil into tank up to the mark of oil dipstick (C). Check for leakage of all connections and lines.

175 175 MAINTENANCE INSTRUCTIONS CHANGING THE HOSES OF HYDROSTATIC STEERING Hydrostatic steering hoses must be exchanged after four years from time of manufacturing (time is marked on hose surface) or after hours of tractor operation, eventually immediately after founding any symptoms of damage i.e. hose sweating, local bulging, leakage of oil at fittings and on hose surface, mechanical damage of hose surface up to steel wire cord or damage of yarn braid at low pressure hoses). Steering-ability is kept even in case of hydrostatic steering pump failure or if the engine stops but the steering force on the steering wheel is bigger Tractor can be driven into the nearest place for repair at reduced transportation speed. Don t keep the steering wheel in the stop steering angle positions (max. time is 20 seconds), otherwise the oil is excessively heated in the hydrostatic steering circuit. F 252

176 MAINTENANCE INSTRUCTIONS CHANGING THE COOLANT Keep the following instruction: - Open the valve of heating system (A) and release the overpressure cap of expansion tank (B). - Drain the coolant from radiator. Draining valve is accessible after removing the left side shield. - Drain the coolant from engine block. Draining valve is accessible after removing the right side shield. - Close both draining valves after draining the coolant (let the heating valve opened). - Fill the cooling system with antifreeze mixture up to neck of expansion tank and close it by overpressure cap. - Start the engine and let it run approximately 1 minute. F 253 F 254 F Add the coolant in expansion tank up to mark "MAX". The minimal possible coolant level is approximately 40 mm under the sealing edge of filler. Close the expansion tank by overpressure cap. At tractor Z disassemble the screw on the additional radiator and check the quality of bleeding. Clear liquid must drain from the radiator after loosening the screw. 176 Never fill the cooling circuit by water only! Use of another coolant can damage the engine. At tractors Z fill the cooling circuit only by Akros Fluid! This liquid can not be mixed with water or another antifreeze!

177 177 MAINTENANCE INSTRUCTIONS CHANGING AND INSPECTING THE TRANSMISSION OIL The oil level is inspected by oil dipstick located on the right side of differential case. Filling opening for transmission oil is located on the hydraulic rockshaft. This is accessible from the rear of tractor. F 256 F 257 F 258 DRAINING OPENINGS AND PLUGS 1 - Oil from clutch housing 2 - Oil from gearbox 3 - Oil from differential case AFTER DRAINING THE OIL - Clean magnetic element (1) and strainer (2). - Exchange the paper cartridge (3). Tighten the screw of cleaner bowl by hand. Do not use tools. - Assemble all draining plugs after their cleaning. - Fill the oil (approximately 40 litters) start the engine and let it run approximately for 2 minutes. - Check the level and add the oil up to the maximum level after stopping the engine and stabilizing the oil level in transmission.

178 178 MAINTENANCE INSTRUCTIONS LUBRICATING AND FILLING POINTS OF FRONT DRIVING AXLE 1. Lubricating nipple of kingpin 2. Sliding bearing (2x) of front driving axle 3. Filling and checking opening of differential housing 4. Draining opening of differential housing 5. Filling, checking and draining opening of front wheel final drive F 259 F 260 GEARBOX OF FRONT PTO 1. filling opening 2. draining opening

179 179 MAINTENANCE INSTRUCTIONS FILLING UP THE BRAKE FLUID Brake fluid tank is located after tilting the bonnet hood. Maintain the brake fluid level within 3/4 (max. level) up to 1/2 (min. level) of tank capacity. Keep the strict cleanness when manipulating with brake fluid. Daily inspect the brake fluid level before driving. F 261 F 262 SPRUNG KNEES OF FRONT AXLE The sprung knees can be blocked for operation requiring higher load of front axle than allowed for sprung execution or if the constant height of front tractor part is required.

180 180 MAINTENANCE INSTRUCTIONS CLEANING THE HEATING FILTERS Filters are located under grills above the front windshield from outside of the cab. Regenerate filters by kicking out, or by pressure air blowing through, according to the stage of clogging. Daily check for clogging. Exchange the strong clogged filters. Tractors are not equipped with special filters of cab intake air. That s why tractors are not intended for operation with aerosols and other health dangerous mediums. F 265 F 266 F 267 MAINTENANCE OF AIRCONDI- TIONING The most important part of maintaining the AC system is cleaning the AC condenser (this is located in front of engine radiator). The clogged AC condenser reduces not only the affectivity of AC system but also the affectivity of engine cooling. Loosen the wing nuts keeping nocdenser to the upper partition of bonnet. Tilt the condenser and blow it out by pressure air or wash it by pressure water. Within the right function of AC the air humidity is condensed in the roof space of cab. Condensed water is drained by hoses in cab pillars and water drains in the bottom part of pillar. Thatřs why it is necessary to keep hoses clean for proper draining the condensed water. Tractors Z equipped with AC are able to work on full load up to ambient temperature 36 C without any restriction.

181 181 MAINTENANCE INSTRUCTIONS DRAINING THE CONDENSED WATER FROM AIR TANKS Drain the condensed water by inclining or pressing the protruded part of valve. Air tanks are located in front of rear axle. At tractors Z Z one air tank is assembled as a standard or two air tanks located on left and right hand side of tractor (in case air brakes are assembled). At tractor Z both air tanks are assembled as a standard. F 268 F 269 F 270 CHECKING THE LEAKAGE OF AIR SYSTEM - Fill the air tank to the max. pressure - The pressure must not drop down by more than 10 kpa after 10 minutes at stopped engine. Daily inspect the system for leaks before operation with trailer. The indicator lamp on the dashboard is on when the air brake system fails or after dropping the pressure under 420 kpa. OPERATING PRESSURE OF AIR BRAKES At single and double hose brakes the pressure in double hose coupling (red cover) is kpa and the pressure in single hose coupling is max. 600 kpa (in time when the air pressure regulator releases the compressor air blows out).

182 182 MAINTENANCE INSTRUCTIONS TIRE MAINTENANCE Regularly check the outer surface of tires and verify that tires are without defects in the side part and that the cord is not damaged. Discard tires with defects. F 271 F 272 INFLATING THE TIRES Basic values of recommended inflation pressure are mentioned in the following tables. Regularly check for the inflation pressure before operation. Check the inflation pressure at cold tires. The tractor air pressure regulator can be used for tire inflation. This regulator serves for maintaining the air pressure, filling tires and serves as a safety valve. Remove the wing nut of regulator (or regulator rubber plug) when inflating the tire and assemble a hose for tire inflating instead of it. Screw down the hose fitting up to the end of thread for pushing the back pressure valve. In case the maximal pressure 0,6 MPa (or 0,7 MPa at double hose brakes) is in air brake tanks the tire can not be inflated. In this case it is necessary to reduce the pressure by valve for draining the condensed water located in the bottom part of air tank. The wing nut (or rubber plug) must be reassembled on the air pressure regulator after tire inflating.

183 183 MAINTENANCE INSTRUCTIONS RECOMMENDED TIRE INFLATION PRESSURE FOR FRONT WHEELS Sum of load capacity for both tires used at front axle must not exceed allowed axle load capacity. Values of allowed axle load capacity is mentioned in main technical parameters of the particular type of tractor. Tires of different design must not be assembled on the same axle of tractor. 2WD TRACTORS Tire size and design Main operating 7, , , , ,4-28 conditions 6 PR 6 PR 6 PR 6 PR 10 PR Field operation Inflating pressure (kpa) load capacity (kg) Road transportation Inflating pressure (kpa) load capacity (kg) Operation with front Inflating pressure loader (8km/h) (kpa) max max.320 load capacity (kg) max.1490 max.1750 max.1350 max.1930 max.2300

184 184 MAINTENANCE INSTRUCTIONS RECOMMENDED TIRE INFLATION PRESSURE FOR FRONT WHEELS Sum of load capacity for both tires used at front axle must not exceed allowed axle load capacity. Values of allowed axle load capacity is mentioned in main technical parameters of the particular type of tractor. Tires of different design must not be assembled on the same axle of tractor 4WD TRACTORS Tire size and design Main operating conditions 12, ,4R24 13,6R24 8 PR Field operation Inflating pressure (kpa) load capacity (kg) Road transportation Inflating pressure (kpa) load capacity (kg) Operation with front Inflating pressure (kpa) loader (8 km/h) 290 max. 200 max.200 load capacity (kg) max max max.1910 Tire size and design Main operating conditions 14,9R24 380/70R24 420/70R24 Field operation Inflating pressure (kpa) load capacity (kg) Road transportation Inflating pressure (kpa) load capacity (kg) (1445)-1650 (1665)-1900 Operation with front loader (8 km/h) Inflating pressure (kpa) max.200 max.200 max.200 load capacity (kg) max.2550 max.2300 max.2300 Note: Tires 380/70R24 can be replaced by tires 13,6R24. Tires 420/70R24 can be replaced by tires 14,9R24.

185 185 MAINTENANCE INSTRUCTIONS RECOMMENDED TIRE INFLATION PRESSURE FOR REAR TIRES Sum of load capacity for both tires used at rear axle must not exceed allowed axle load capacity. Values of allowed axle load capacity is mentioned in main technical parameters of the particular type of tractor. Tires of different design must not be assembled on the same axle of tractor. Main operating conditions Field work Road transportation Main operating conditions Field work Road transportation Tire size and design 16, ,9R34 18, ,4R34 8 PR 8 PR Inflating pressure (kpa) load capacity (kg) Inflating pressure (kpa) load capacity (kg) max max Tire size and design 16, ,9R38 480/70R38 18,4R38 520/70R38 8 PR Inflating pressure (kpa) load capacity (kg) Inflating pressure (kpa) load capacity (kg) max Note: Tires 480/70R38 can be replaced by tires 16,9R38. Tires 570/70R38 can be replaced by tires 18,4R38. Inflate front and rear tires to lower mentioned value when working on fields with light soils (dry, sandy soils). Higher mentioned pressure is intended for working in heavy and compact soils. When tilling any deformation of tire side walls must not be appeared at minimal inflating. Load capacities mentioned in tables are valid under supposition that the speed of tractor doesn řt exceed 30 km/h. Mentioned values are considered for one tire. For tractor maximal load of axle mustn řt exceed max loads of tires.

186 186 MAINTENANCE INSTRUCTIONS When loading the tractor, the allowed axle load capacity of axles must not exceed the allowed load capacity mentioned in main technical parameters of the particular type of tractor. Change of tire load from the basic value is mentioned in the following tables. Note: values for inflating tires 100% are mentioned in tables of recommended inflating in article Main operating activities for field operation. TIRES FOR NON DRIVEN WHEELS Front wheels Speed km/h Load capacity % Inflating % (200*) * value for front loader only TIRES FOR DRIVING WHEELS Wheels - diagonal tire Speed km/h Load capacity % Inflating % ** ** minimal value for 6 PR It is not allowed to increase the tire load capacity by farther increase of inflating pressure over values mentioned in table and with reducing the tractor travel speed except of mentioned cases. TIRES FOR DRIVING WHEELS Wheels - radial tire Speed km/h Load capacity % Inflating % TRACTOR STORAGE If the tractor is stored out of operation for short period, inflate tires to value used for road transportation. When storage of tractor for a long period, support the tractor and reduce the tire pressure to minimum (wheels must not touch the ground).

187 NOTE 187

188 NOTE 188

189 ADJUSTMENT Page Inspecting the tension of engine belt Tension of engine belt Tightening the cylinder heads Adjustment of valve clearance Adjustment of valve clearance Adjustment of injectors Adjustment of injectors Adjustment of brake pedal free travel Bleeding the service brake system Adjustment of clutch pedal free travel Bleeding the clutch hydraulic circuit Bleeding the front cardan brake Bleeding the front drum brake Inspection of service brake Adjustment of service brake Adjustment of parking brake Changing the brake segments of front cardan brake Adjusting the free play of front wheel tapered roller bearings at tractors Z 8621, Z Adjusting the lifting links of pick up hitch Adjusting the push-pull cable Almost all these following operations require certain experience, service and diagnostic equipment. Thatřs why we recommend doing this work at specialized or authorized workshop 189

190 190 ADJUSTMENT INSPECTING THE TENSION OF ENGI- NE BELT The correct tension of each belt is assured when the belt is deflected 7,5 mm after pushing on the belt by force 25 N. Adjust the tension of belt to prescribed value after loosening the fixing screws (1, 2). F 273 F 274 F 275 TENSION OF ENGINE BELT At tractors Z the correct tension is when the belt is deflected 25 mm after pushing on the belt by force 50 N. TIGHTENING THE CYLINDER HEADS Cylinder heads are tightened at cold engine in the prescribed sequence. Tractor Type Torque Valve clearance Tractor Type Torque Valve clearance Z Z (A) Nm 0,25 0,05 mm Z (B) 1. first 19Nm 2. than 50 Nm 3. subsequently tighten by 90 5ř) 0,30 0,05 mm

191 ADJUSTMENT ADJUSTMENT OF VALVE CLEA- RANCE Engine valve clearance is adjusted at cold engine. The correct valve clearance at suction and exhaust valve is 0,25 ± 0,05 mm. Change of rocker arm movement: Change of rocker arm at cylinder: Adjusted valve at cylinder: F 276 F 277 F 278 ADJUSTMENT OF VALVE CLEARANCE At tractors Z the engine valve clearance is adjusted at cold engine with piston in top dead positions at the end of compression stroke. The correct valve clearance at suction and exhaust valve is 0,30 mm Change of rocker arm movement: Change of Adjusted valve at rocker arm at cylinder: cylinder ADJUSTMENT OF INJECTORS The opening pressure of injectors is 22,0-0,8 MPa. Adjust the pressure to the upper limit of tolerance (22,0 MPa) by shims (1) of various thickness, which are assembled under the spring (2). The right position of injection nozzle (3) is done by positioning pins on sealing surface. Torque of fixing nut (4) is Nm. Before tightening the nut press the nozzle against spring by pushing the nozzle against wooden surface.

192 192 ADJUSTMENT ADJUSTMENT OF INJECTORS At tractors Z the opening pressure of injectors is 18 MPa. If the measured value differs from the mentioned one adjust the spring of injector by adding or removing the special shims which determine preloading the spring. Checking the injectors on testing bench. F 279 F 280 ADJUSTMENT OF BRAKE PEDAL FREE TRAVEL The correct play between piston rod of brake pedal and piston of main brake valve is 0,5-1,0 mm. Adjust the play with unlatched pedals and after releasing the piston rod adjusting nut (1), in which the piston rod is screwed down.

193 193 ADJUSTMENT BLEEDING THE SERVICE BRAKE SYSTEM Bleed the system with unlatched pedals separately for each wheel. - Check the brake fluid level in the brake fluid tank. Add the missing volume with the new brake fluid up to max. level. - Slide the hose on the vent screw after removing the rubber plug and put the other end of hose into the transparent reservoir partially filled with brake fluid (3). - Press the brake pedal, loosen the vent screw maximally by 1/4 turn. Press the brake pedal fully down and tighten the vent screw - Release the brake pedal and repeat procedure so long until the clear brake fluid without bubbles flows out from the hose. Check the brake fluid level in the brake fluid tank when bleeding to avoid aerating the brake system (1). Keep the hose end permanently under brake fluid level. Reservoir (2) needs to be kept in the highest possible position. The brake fluid must be completely exchanged in the whole brake circuit minimally after two years. F 281 F 282 Check the brake fluid level in the brake fluid tank when bleeding to avoid aerating the brake system (1). Keep the hose end permanently under brake fluid level. Reservoir (2) needs to be kept in the highest possible position. The brake fluid must be completely exchanged in the whole brake circuit minimally after two years.

194 194 ADJUSTMENT ADJUSTMENT OF CLUTCH PEDAL FREE TRAVEL The play between pedal piston rod and clutch valve piston does not need to be adjusted - this is adjusted by producer. The mutual position between piston rod and piston rod eye (1) is adjusted that way the piston rod is maximally pulled from cylinder and the pedal is stopped on the upper stop screw (2) in the same time. Afterwards the piston rod is fixed by nut (3) to piston rod eye. Check eventual deformation of dust cap after adjustment. In case of deformation correct it by hand F 283 F 284 BLEEDING THE CLUTCH HYDRAULIC CIRCUIT Bleed the clutch hydraulic circuit by the same way as bleeding the rear brake system. Vent screw of clutch hydraulic circuit is located on the clutch control cylinder (1). The brake fluid must be completely exchanged in the whole brake circuit including the clutch circuit minimally after two years.

195 195 ADJUSTMENT BLEEDING THE FRONT CARDAN BRAKE Bleeding the brake system must be done at 4WD tractors equipped with cardan brake. It is necessary to start step by step at both pairs of cardan brake cylinders. One pair of cardan brake cylinders has two went screws (1), the second pair has three went screws (2). Bleed the system with unlatched pedals so that you will gently press one from pedals and you will bleed one pair of cardan brake cylinder connected with circuit -I by the second pedal. Change pressing to pedals and bleed the second pair of cardan brake cylinder connected with circuit -II. After bleeding the cardan brake bleed the rear service brake. F 285 F 286 BLEEDING THE FRONT DRUM BRAKE Bleeding the front drum brake can be done only with right pressure in the air brake system. Bleed the front drum brake by vent screws of wheel brake cylinders. Press both pedals connected by latch at bleeding. In the end bleed the font brakes.

196 196 ADJUSTMENT INSPECTION OF SERVICE BRAKE Press unlatched pedals of service brake by maximal force approximately 500 N. In case that pedal touches the stop, it is necessary to adjust service brakes. The stop is created by the riser on bottom part of brake pedal bracket. F 287 F 288 ADJUSTMENT OF SERVICE BRAKE Before adjustment of service brake the parking brake lever must be in disbraked position and there must be a play between nut (1) and pin (2) in lever of disc brake (3). In case you will find this system without a play, loosen gently the nut (1). Lift both rear tractor wheels and let turn one wheel by means of your helper by hand. Simultaneously tighten the adjusting nut (4) so long the wheel can not be turned by hand. Do not tighten more. After blocking the wheel loosen the adjusting nut by 5/6 of turn (5 flats of nut) and check for turning the wheel. After this basic adjustment check for efficiency of service brakes and for the brake effect of both wheels. If the asymmetry of brake effect appears between left and right brake the adjusting nut (4) of brake with bigger brake effect needs to be loosened by required value.

197 197 ADJUSTMENT ADJUSTMENT OF PARKING BRAKE Adjustment of parking brake follows after service brake adjustment. Parking brake lever must be in disbraked position. Adjust the parking brake so the lock nut (1) of parking brake link (2) touches the pin in disc brake lever (3). After this basic adjustment check for efficiency of parking brakes and for the brake effect of both wheels. If the asymmetry of brake effect appears between left and right brake the adjusting nut (1) of brake with bigger brake effect needs to be loosened by required value. F 290

198 198 ADJUSTMENT CHANGING THE BRAKE SEGMENTS OF FRONT CARDAN BRAKE Brake segments must be exchanged if the thickness of lining is smaller than 2mm. Brake segments are accessible after removing of two cotter pins securing the cover sheet metal. The wear of cardan brake segments is indicated by indicator lamp on the dashboard. Note: There are contacts in brake segment lining and these connect signal electric circuit after wearing. F 291 F 292 ADJUSTING THE FREE PLAY OF FRONT WHEEL TAPERED ROLLER BEARINGS AT TRACTORS Z 8621, Z Fix tractor against movement, lift up and support the front axle. - Remove the bearing cover (1) and remove the cotter pin (2) from the castle nut (3). - Tighten the castle nut (3) by 15 Nm. - Loosen the nut by 180 and release the bearing by knocking of wooden mallet to the wheel hub. - Retighten the castle nut (3) with torque wrench by 3-5 Nm. If the slots of castle nut are not aligned with opening in pin loosen the nut to the nearest slot. Wheel must be freely turned without evident play but without evident resistance. Bearings mustnřt be noisy. (Hub sealing creates a friction against turning and this needs to be taken into consideration). - Lock the castle nut with a new cotter pin. - Add the grease in cover (1) fill maximally 1/3 of space in the hub.

199 199 ADJUSTMENT ADJUSTING THE LIFTING LINKS OF PICK UP HITCH Chose the position control - "P" by hydraulic selection control lever. Raise the hydraulic lifting arms into the upper position. Adjust the telescopic links that way you thread the lock nuts to guiding tube without play. Than unscrew the nuts by 4 threads. F 293 F 294 ADJUSTING THE PUSH-PULL CABLE Adjust when the carrier with towing hook is in full contact with carrier hooks. The push pull cable must be under tensioning that way to be the lever in cab without play. Lock the push pull cable by lock nut against loosening.

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203 203 ELECTRICAL INSTALLATION Page Electrical equipment Basic service information Battery Battery maintenance Charging and maintaining the batery Alternator Alternator maintenance Fuse box Checking the adjustment of front mask headlights Adjustment of front grill headlights Checking the adjustment of cab roof headlights Wiring harness diagram of tractor...212

204 204 ELECTRICAL INSTALLATION ELECTRICAL EQUIPMENT Nominal voltage (minus pole (-) grounded) 12 V Battery (1) Z Z AKUMA 12V/135Ah 12 V AKUMA 12V/165Ah Z AKUMA 12V/165 Ah HD AKUMA 12V/180 Ah 12 V Alternator with voltage regulator (2) Z Z V/70 A Z V/85 A Starter motor (3) 12V/3,5kW F 295 F 296 BASIC SERVICE INFORMATION Battery "minus" pole must be ever connected with the ground and "plus" pole connected with alternator. Vice versa connected battery destroys the complete electronics of alternator. If starting the tractor by means of another battery or auxiliary source don t forget to connect "plus" to "plus" and "minus" to "minus". Disconnect battery by removing the connector from tractor ground (-) if changing any part of charging circuit. Avoid possible short circuit on connectors.

205 205 ELECTRICAL INSTALLATION BATTERY Battery (1) is accessible after removing the front grill of bonnet. Battery switch (3) is located on the left-hand side under the cab. This is accessible from outside. BATTERY MAINTENANCE Maintain the battery clean, good fixed to the vehicle. The fixing device mustn t deform the battery case. Electrolyte level mustn t be under the minimum mark that is on the case. F 297 F 298 Add distilled water only! 1. First study the operator s manual for working with batterry. 2. Safe your eyes by glasses or by safety shield! 3. Electrolyte is a caustic agent that s why keep attention when working with electrolyte! Neutralize the skin and wear stained by electrolyte with soap water. Wash them by clean water. 4. Hydrogen is released from electrolyte at charging the battery and this creates the explosive mixture being mixed with the air. That s why manipulation with open flame and smoking at battery is forbidden! 5. The explosion might be caused by a spark created at manipulation with battery terminals when the closed charging circuit! 6. Keep children out of battery and electrolyte! 7. Discarded battery is ecologically dangerous reject. Let it scrap by specialists (service network). They will do it free of charge when buying the new battery.

206 CHARGING AND MAINTAINING THE BATERY A) Charging on the vehicle and outside the vehicle 1. Systematic overcharging and discharging of battery damages and shortens its life. Correctly adjusted charging system maintains battery near to the fully charged status. At set level of voltage (13,8-14,4 V) in charging system and average tractor operation it is sufficient to check and maintain the level of electrolyte by distilled water once per six month. 2. At heavier operation and another level of regulated voltage it is necessary more frequent checking the level of electrolyte. Overcharging the battery on vehicle (more than 14,4 V) causes bigger loose of electrolyte. 3. It is necessary to charge the battery removed from the vehicle or in the vehicle which is not in operation (see storage of charged batteries with electrolyte). It is also suitable to charge battery in vehicle before wintertime and after wintertime. In winter season and strong frost the electrolyte might be frozen at almost discharged battery (density of electrolyte 1,12-1,15 g/cm 3 ) in this case the life will be substantially reduced (disintegration of active ELECTRICAL INSTALLATION agent and destroy of battery case). Heavily discharged battery (density of electrolyte lower than 1,07 g/cm 3 ) might be frozen already at several degrees below zero. 4. Charge the battery by current that is 0,1 of total battery capacity (or lower) up to fully charged status. 5. Charging device with constant voltage 14,4 V can be also used. Charging time can be max. 30 hours according to status of discharging. 6. Fully discharged battery must be charged as soon as possible, otherwise its full capacity can not be restored. B) Charged battery 1. Battery is considered as fully charged if all battery cells generates the gas with same intensity. If the electrolyte density is 1,28 g/cm 3 in all cells and if the total voltage of battery is within 15,3-16,5 V, measured with the prescribed charging current. 2. Status of full charging is confirmed when the received density of electrolyte and level of voltage is not changed within farther two measurements following after two hours. 3. For example the charging status for your orientation: status of charging corresponds to density of electrolyte. Charging status is characterized by 206 density of electrolyte and is measured by densimeter. Every cell needs to be measured. Status of charging = density of electrolyte charging status Electrolyte density 100 % 1,28 g/cm 3 70 % 1,23 g/cm 3 50 % 1,20 g/cm 3 20 % 1,15 g/cm 3 0 % 1,12 g/cm 3 C) Storage of charged battery with electrolyte 1. Before storage the battery must be charged up to final symptoms of charging. It must be disconnected from charging system, cleaned and with plugs. 2. Battery that is built into a plastic case from polypropylene must be charged after three month of storage because of smaller self-discharging.

207 207 ELECTRICAL INSTALLATION 3. Intervals for checking the status of electrolyte are: when charging the battery or minimally once per 6 month, battery is maintained by adding the distilled water! If some electrical components are permanently connected even at disconnected key switch (for example Warning) it is necessary to check the status of charging i.e. voltage w/o load and electrolyte density min. 1x after 1 month.

208 208 ELECTRICAL INSTALLATION ALTERNATOR Alternator is accessible after removing the right side shield. Charging status is indicated by the red indicator lamp on the instrument panel. Damaged indicator lamp bulb 12 V 1,2 W must be immediately exchanged. All wires connected with the alternator must be disconnected when repairing tractor by electric arc welding. Protect the wire "+B" against short circuit. F 299 F 300 ALTERNATOR MAINTENANCE - Protect the alternator against penetration of water or diesel fuel when washing and cleaning the tractor. - Battery must be never disconnected from alternator within the operation! - The alternator must never run without load i.e. with disconnected terminal "+B" and connected terminal "+D". When increased engine speed, this status would create excessively high voltage of alternator and the voltage would damage the alternator electronics. - Never create the short circuit of any alternator connector within the operation! - Alternator must not be additionally excited. Alternator electronics is damaged in this case. - Keep the perfect electrical connection of alternator terminals and perfect alternator ground.

209 209 F 301 FUSE BOX Fuse box is accessible after removing the steering support left cover. The main fuse box has eight polls. Farther four poll fuse box located nearby the main box is assembled at cab tractors. Fuses are of knife type and the prescribed value of amperage must be kept when exchanging fuse. In case of repeated fuse exchange look for the authorized service. ELECTRICAL INSTALLATION Position of fuse in fuse box Pos. Fuse size 1 15A 2 15A A 15A 15A 15A 15A 15A 15A 15A 15A 15A Protected circuit Hazard light interrupter, brake lights acoustic horn, outlet 30 of starter interlock relay front driving axle, diff. lock, front PTO w/ indicator lamps, diff. lock relay 3, dashboard supply, plug socket for assembly lamp high beam head lights with indicator lamp left position light, license plate light right position light, working headlight with indicator lamp right low beam head light, fog light with indicator lamp left low beam head light, indicator lamp for grill/roof head light front and rear wiper, washer, relay 4, heating blower, relay 5 and 6 reserve air condition (AC compressor clutch)

210 210 ELECTRICAL INSTALLATION CHECKING THE ADJUSTMENT OF FRONT MASK HEADLIGHTS Tractor must stand on horizontal ground and tires must be inflated to the specific pressure when checking on a testing wall. Basic vertical setting of grill headlights with low beam is adjusted with - 3,5 % tolerance from basic setting (measured at stopped tractor with shipping weight). Light beams must be parallel with tractor axis in horizontal direction. I - Distance between testing wall and tractor headlight (5 m). h - Height of headlight center above ground h - Inclination of headlight (-3,5 %) to distance of testing wall = 17,5 cm α - Raising the picture of asymmetric headlight (15%) F 302 F 303 ADJUSTMENT OF FRONT GRILL HEADLIGHTS Adjust the light by means of both screws (1) for vertical and horizontal direction simultaneously - horizontally 2 ; vertically +1 to -6. Each light is adjusted separately. Bulb is exchanged from the rear part of parabola. Slide out or remove the battery because of limited space.

211 211 ELECTRICAL INSTALLATION CHECKING THE ADJUSTMENT OF CAB ROOF HEADLIGHTS Any point of illuminated surface on the left side of road must not be more far than 30 m. Light beams must be parallel with tractor axis in horizontal direction. Adjust the headlights at tractor with its shipping weight. Front roof headlights can be used on the road only in case that front implement is attached or if the attached machine covers grill headlights. F 304

212 212 WIRING HARNESS DIAGRAM OF TRACTOR Poz. Location of bulb Voltage Power Socket Notice 1 front asymmetric headlights 12 V 45/40 W 2 cab roof asymmetric headlights 12 V 45/40 W (low beam connected) 3 front combined headlights turning lights 12 V 21 W position lights 12 V 10 W 4 working lights 12 V 55 W H 3 5 rear combined lights tail lights 12 V 10 W brake lights 12 V 21 W turning lights 12 V 21 W 6 license number plate illumination 2x12 V 5 W 7 dashboard integrated instrument panel 12 V 1,2 W 8 cab illumination 12 V 5 W 9 switch of hydraulic electromagnetic control 12 V 1,2 W F 307

213 213 WIRING HARNESS DIAGRAM OF TRACTOR F 305