MF2625, MF2645, MF2685, MF2725, MF3505, MF3525 & MF3545 Volume 1 of 2

Transcription

1 Massey Harris Massey Ferguson Service Manual MF2625, MF2645, MF2685, MF2725, MF3505, MF3525 & MF3545 Volume 1 of 2 Service Manual THIS IS A MANUAL PRODUCED BY JENSALES INC. WITHOUT THE AUTHORIZATION OF MASSEY HARRIS MASSEY FERGUSON OR IT S SUCCESSORS. MASSEY HARRIS MASSEY FERGUSON AND IT S SUCCESSORS ARE NOT RESPONSIBLE FOR THE QUALITY OR ACCURACY OF THIS MANUAL. TRADE MARKS AND TRADE NAMES CONTAINED AND USED HEREIN ARE THOSE OF OTHERS, AND ARE USED HERE IN A DESCRIPTIVE SENSE TO REFER TO THE PRODUCTS OF OTHERS. MH-S-MF2625+

2 0-01 INTRODUCTION INTRODUCTION Page Number INTRODUCTION 01 DEFINITIONS 02 SPECIAL TOOLS 02 REPAIR TIME SCHEDULE 02 AMENDMENTS 02 INSTRUCTIONS 04 SAFETY 04 SYSTEM FAUL TS 04 HANDLING HEAVY COMPONENTS 04 REMOVAL AND INSTALLATION OF COMPONENT PARTS CONVERSION TABLES TORQUE LOADING SPECIAL TOOLS SEALANTS INTRODUCTION The purpose of this manual is to assist dealers and distributors in the efficient repair and maintenance of Massey-Ferguson farm machinery. Carrying out the procedures as detailed, together with the use of special tools where appropriate, will enable the operations to be completed within the time stated in the repair time schedule. INDEXING For convenience the manual is divided into parts and sections, each page bearing a part and section number. The sections are subdivided into numbered operations. Example:-7A would be Part 7 Section A Operation 01 Page 15 This simplifies cross referencing and enables the subject to be found easily. NOTE-To assist with locating information, each division of the manual is preceeded by a contents page listing the operation in numerical order. Each instruction within an operation has a sequence number, and to complete the operation in the minimum time it is essential that these instructions are performed in numerical sequence commencing at 1 unless otherwise stated. When applicable, these sequence numbers identify the components in the appropriate illustration. Where performance of an operation requires the ustj of a special tool, the tool number is quoted under the operation heading and is repeated in, or following, the instruction involving its use. To select the Section required: 1. Select from front contents page, the tractor model in the top horizontal column. 2. Select from the vertical description column, the section which is required. 3. Cross reference the model column with the description column to select the part and section required. To select the Operation required: 4. Select the section contents page. 5. From the section contents page, select the operation and page number required. 6. Select the page and operation required.

3 la-ul SPECIFICATIONS SPECIFICATIONS PART 1 - SECTION A Page No. 1 ENGINE 02 2 FUELSYSTEMANDAIRFILTER 02 3 ELECTRICAL SYSTEM 03 4 COOLING SYSTEM 03 5 TRANSMISSION 03 6 POWER TAKE-OFFS 06 7 HYDRAULICS 06 8 LINKAGE 07 9 BRAKES STEERING FRONT AXLE 2WD- 4WD- TRACK WIDTH ADJUSTMENT WHEELSANDTYRES CAPACITIES DIMENSIONS WEIGHTS CAB BALLAST ACCESSORIES 09

4 SPECIFICATIONS 1. ENGINES Manufacturer: Perkins, to MF specifications MF2625 MF2645 MF2685 Diesel, Direct Injection, 4-stroke yes yes yes Type A Standard A Premium AT Premium Number of cylinders Bore 98.48mm 98.48mm 98.48mm Stroke 127mm 127mm 127mm Cubic capacity 5800c.c c.c c.c. Compression ratio 16:1 16:1 15.5:1 Firing order Rated speed 2000 rev/min 2400 rev/min 2400 rev/min Overhead, push rod operated valves yes yes yes Valve tip clearances, cold Inlet: 0.20 mm Inlet: 0.20 mm Inlet: 0.20 mm Exhaust: 0.45 mm Exhaust : 0.45 mm Exhaust 0.45 mm Lubrication By gear pump. Strainer on suction side and external, full flow, replaceable cannister type filter with by-pass valve. Engine oil pressure at max. engine revs. and normal operating temperature 2.1 bar min. 2.1 bar min. 2.1 bar min. Oil filter 1 on RH side, 1 on RH side, 2on RH side, Inverted Inverted Inverted Heat exchanger No Integral with Remote (radiator) filter. Water cooled with dual outlet and dual thermostat pump and Cooling integral expansion chamber. Exhaust Vertical Vertical Turbo-charger "Aire Search" T.04-B No No Turbo-charge pressure (turbocharger outlet) Power ratings SAEJ hp kw DIN hp kw 104 hp kw OECD at rated speed 80 hp kw 90 hp. 66 kw Maximum torque 365Nm 366Nm at engine speed 1250 rev/min 1400 rev/min Vertical Yes bar 132 hp. 97 kw 120hp. 88kW 105 hp kw 400Nm 1600 rev/min MF2725 yes AT CC mm 127mm 5800c.c. 15.5: rev/min yes Inlet: 0.20 Exhaust0.45 mm 2.1 bar min. 2on RH side, Remote (radiator) Vertical Yes bar 147 hp 132 hp 493Nm 1600 rev/min 2. FUEL SYSTEM-AIR FILTER -,;,; -~ Fuel lift pump: AC DELCO diaphragm type with hand priming lever. Fuel filter: CAV with parallel dual element and sediment bowl. Injection pump: CAV DPA rotary type with mechanical governor. Engine speeds: Idling 975 to Maximum 2640 rev/min. Injection timing : 2625 : : : : 30 Injectors and nozzle holders : C.A. V. Injector settings: Working pressure-2625: 200 bar 2645: 200 bar 2685: 210 bar 2725: 230 bar Setting pressure-2625: 215 bar 2645: 215 bar 2685: 210 bar 2725: 240 bar Cold weather starting: CAV Thermostart-type Air filter: Two-stage, dry elements, removable for cleaning, with clogging indicator and prefilter. Sediment bowl type air prefilter: Option on Standard on 2645/2685/2725

5 ld-ul MAINTENANCE MAINTENANCE PART 1 - SECTION B RUNNING-IN 50-HOUR SERVICE 500-HOUR SERVICE PERIODIC MAINTENANCE Page No The purpose of this section is to provide the reader with a quick guide to what maintenance operations should be carried out and when. It also contains detailed instructions on running-in and the maintenance operations to be carried out after 50 and after 500 hours in service. These operations are recommended in order to prolong the tractor's life. RUNNING-IN The following precautions should be taken when running the tractor in:,,-, 1. The running-in procedure for Diesel engine is not the same as for petrol engines. Experience has shown that the first 50 hours of tractor operation have a significant effect on the performance and life of the engine. From new, the tractor should be engaged in work which will load the engine as near to full conditions as possible. 2. Use a low gear when pulling heavy loads. 3. During the running-in period, frequently check the tightness of all screws, nuts, bolts, etc. 4. To ensure proper clutch life, care must be taken to bed-in the friction plates properly. During the first 15 hours of the tractor's I ife, frequently but gently engage and disengage the clutch. 5. Do not forget that the customer's free service entitlement includes changing of oil and filter elements...i

6 n.. -u, PRE-DELIVERY AND INSTALLATION PRE-DELIVERY AND INSTALLATION Page No. PRE-DELIVERY CHECK TRACTOR INSTALLATION TRACTOR STORAGE PREPARING THE TRACTOR PRIOR TO RETURN TO WORK TRACTOR WATERPROOFING To ensure the regular maintenance of the tractor during the 12-month warranty period, TWO free services must be carried out by the supplying Distributor or Dealer (consumable items are charged to the customer). The TWO Free Service Vouchers, detailing the servicing to be carried out, cover the first 50 and 250 hours running of the tractor. The timing of these two services has been calculated to provide maximum tractor efficiency throughout the Warranty period thus safeguarding the subsequent life of the tractor.

7 .:.K-UI SHEET METAL Operation Number 2A A A A A A A A A A SHEET METAL PART 2 - SECTION A ENGINE HOOD SIDE PANELS RADIATOR GRILLE SURROUND ASSEMBLY FRONT MOULDING Replacement REAR MOULDING Replacement FRONT LEFT-HAND CAB SUPPORT RIGHT-HAND BATTERY TRAY SUPPORT FRONT RIGHT-HAND CAB SUPPORT NUMBER PLATE FRONT FOOTSTEP (4WD Tractor) REAR PTO GUARD Page Number The hood, side panels, radiator grille and seals, all of which are easy to remove, protect the tractor. The tractor must not be operated with any of these sheet metal components removed, except for the P.T.O. guard, which has to be removed to use certain agricultural implements. To prevent corrosion, always keep the sheet metal components clean and respray the metal as soon as possible when any parts become chipped.

8 CAB Operation CAB Page Number PART2 - SECTION B Number: DESCRIPTION 02 FENDER EXTENSION 2B INSTRUMENT PANEL GUARDS 2B FOOT THROTTLE GUARDS AIR FLOW VENT ASSEMBLY 2B ROOF LINER 2B ROOF HATCH ASSEMBLY 28-05A AIR RECIRCULATION CONTROL Inspection - Servicing 05 CAB DOOR 2B DOOR CATCH 2B DOOR LOCK ASSEMBLY 2B DOOR STAY 2B CAB SEAT ASSEMBLY 2B SEAT BRACKET 2B SEAT CUSHION ASSEMBLY 2B SEAT LOCKING MECHANISM 2B Inspection 09 SEAT RAIL SUPPORT FRAME SEAT SUPPORT ASSEMBLY 2B SEAT SUSPENSION MECHANISM 2B Overhaul - Servicing 10 REAR VIEW MIRROR ASSEMBLY 2B AIR FILTER 2B Maintenance 11 SEAT WEIGHT ADJUSTING MECHANISM Assembly and Disassembly 13 SEAT 2B SEAT PAN AND BACK REST ASSEMBLY 2B Assembly and Disassembly 14 FRONT WINDOW 2B

9 ~ts-uh CAB CAB SEAT ASSEMBLY Removal 2B Remove the four bolts the four spring washers and the four flat washers. 2. Remove the seat assembly. Refitment 3. Reverse procedures 1 and Tighten the four bolts to a torque of Nm (25-38 lbf ft). SEAT BRACKET Removal 2B Remove the four bolts and the four washers. 2. Remove the bracket. Refitment 3. Reverse procedures 1 and Tighten the four bolts to a torque of Nm (32-48 lbf ft). SEAT CUSHION ASSEMBLY 2B Removal 1. Remove the cab seat assembly, operation 2B Remove the four Allen Screws. 3. Remove the cushion and backrest assembly. ( Refitment 4. Reverse procedures 1 to Tighten the four Allen screws to a torque of Nm (12-17 lbfft).

10 .c:~-u, AIR CONDITIONING Operation AIR CONDITIONING Page Number PART 2 - SECTION C Number - OPERATION 02 INSTALLATION DIAGRAM 03 COMPRESSOR 2C ELECTRO-MAGNETIC CLUTCH 2C Overhaul - Servicing 05 CONDENSER 2C PLENUM CHAMBER ASSEMBLY 2C BLOWER 2C RADIATOR-EVAPORATOR ASSEMBLY 2C DRIP TRAY 2C EXPANSION VALVE 2C Replacement 10 AUTOMATIC AIR CONDITIONING CONTROL 2C Replacement 10 EMPTYING AND RECHARGING THE SYSTEM WITH REFRIGERANT 2C Method 11 COMPRESSOR OIL LEVEL CHECK SANKYO COMPRESSOR 16 ELECTROMAGNETIC CLUTCH 2C Service 17 SHAFT SEAL 2C Service 19 CYLINDER HEAD AND VALVE PLATE 2C Service 21 2C TROUBLE-SHOOTING CHART 23

11 3A-01 SPLITTING THE TRACTOR Operation Number SPLITTING THE TRACTOR PART 3 - SECTION A Page Number 3A A A A SPLITTING THE TRACTOR BETWEEN THE FRONT AXLE AND THE ENGINE Splitting Procedure for 4WD Tractor SPLITTING THE TRACTOR BETWEEN THE ENGINE AND THE TRANSMISSION Splitting Procedure for 4WD Tractor SPLITTING THE TRACTOR BETWEEN THE TRANSMISSION AND THE REAR AXLE (Cab integral with Centre Housing) Splitting Procedure for 4WD Tractor SPLITTING THE TRACTOR BE:TWEEN THE TRANSMISSION AND THE REAR A~LE (Cab integral with the Transmission) Splitting Procedure for 4WD Tractor The four methods of splitting the tractor described in this section give access to the following four major mechanical assemblies: - Front axle beam - Engine - Transmission - Centre housing The splitting procedures are similar to all 4WD models, exceptions will be indicated in the instructions. They also apply to 2WD tractors, apart from a few rare exceptions indicated in the instructions.

12 4A-Ul ENGINE /... "' '1,) Operation ENGINE Page No. PART 4 - SECTION A No. 03 SPECIFICATION 03 LUBRICATING SYSTEM DIAGRAM 04 TIGHTENING TORQUES- CLEARANCES & TOLERANCES 05 ROCKER COVER 4A VAL VE TIP CLEARANCES 4A Adjustment 18 ROCKER SHAFT ASSEMBLY 4A A Overhaul - Servicing 19 INDUCTION MANIFOLD 4A EXHAUST MANIFOLD 4A A.:::' EXHAUST SILENCER AND PIPE 21 CYLINDER HEAD 4A Removal and. Refitment 21 VALVE SPRINGS 4A VALVES 4A A Reconditioning of Seats and Grinding in of Valves and Seats 24 VALVE GUIDES 4A VALVE SEAT INSERTS 4A TRACTORMETER CABLE DRIVE 4A CAMSHAFT GEAR 4A AUXILIARY DRIVE GEAR 4A CRANKSHAFT PULLEY 4A TIMING CASE 4A CRANKSHAFT FRONT 01 L SEAL 4A CRANKSHAFT GEAR 4A~ IDLER GEARS 4A CAMSHAFT AND TAPPETS 4A AUXILIARY DRIVE SHAFT 4A FUEL INJECTION PUMP DRIVE SHAFT 36

13 ENGINE Operation No. Page No. QUICK ENGINE TIMING CHECK 4A Method 37 FLYWHEEL 4A FLYWHEEL RING GEAR 4A CRANKSHAFT REAR OIL SEAL 4A FLYWHEEL HOUSING 4A OIL SUMP 4A OIL PUMP 4A A Overhaul 44 RELIEF VALVE AND PIPE 4A Removal - Sermicing - Refitment 45 OIL FILTER 4A-34-ti6 46 ADAPTOR 4A BIG END BEARING 4A PISTONS AND CONNECTING RODS 4A: A Overhaul - Servicing 49 CYLINDER LINERS 4A CRANKSHAFT MAIN BEARINGS 4A CRANKSHAFT 4A CRANKSHAFT THRUST WASHERS 4A BELTS 4A ENGINE 4A PISTON COOLING JETS 4A OIL FILTERS AT ENGINES 4A OIL FILTER HEAD 4A ADAPTOR BODY 4A

14 ENGINE CYLINDER HEAD (contd.) Refitment 4A Check the condition and tightness of the studs. 22. Check that the push rods are straight. 23. Make sure that the rocker assembly oil feed passage in the cylinder head is clean. 24. Fit a new cylinder head gasket dry. It is marked TOP FRONT. 25. Reverse procedures 1 to 17, making sure that the various bolts and studs are in their correct position 26. Tighten the securing nuts and bolts numbers 1 to 32, in the order shown, to a torque of 156 Nm (115 lbf ft). Then tighten bolts 33 to 38 to a torque of 38 Nm (28 lbf ft). 27. Adjust the valve tip clearances, operation 4A Start the engine and allow it to reach normal operating temperature. 29. Retorque the cylinder head nuts and bolts in the order described in paragraph Check the valve tip clearances with the engine cold, operation 4A VALVE SPRINGS 4A Special tools : Valve spring compressor and adaptor. Removal 1. Disconnect the battery caoles, section 9A. 2. Remove the rocker cover, operation 4A Remove the rocker shaft assembl')!, operation 4A Turn the crankshaft to bring the required piston to T.D.C. 5. Compress the valve springs using tool and the appropriate adaptor. 6. Remove the split collet. 7. Remove the spring retaining cap. 8. Remove the springs. 9. Remove the oil seal. 10. Remove the valve seat. 11. Check the springs. The outer spring could compress to a length of mm (1.780") under a load of kgf (38-43 lbf). The inner spring should compress to a length of mm (1.563") under a load of kgf ( lbf). NOTE: A new set of springs should be fitted at every major engine overhaul. C Refitment 12. Reverse procedures 1 to 10 making sure that the springs are fitted with the damper coils towards the cylinder head. Adjust the valve tip clearances, operation 4A

15 4B-01 COOLING SYSTEM Operation COOLING SYSTEM Number PART 4 - SECTION B 4B B B B B OPERATING PRINCIPLES - CIRCUIT FILLING THE SYTEM - FROST PRECAUTIONS RADIATOR FAN AND WATER PUMP PULLEY WATER PUMP Overhaul - Servicing THERMOSTATS Removal, Inspection and Refitment FAULT DIAGNOSIS- LOWER WATER INLET CONNECTION OIL COOLER OIL COOLER (SERVICE) Assembly and Disassembly CHARGE COOLER Page Number OPERATING PRINCIPLES The coolant is circulated by thermo-syphon action assisted by a centrifugal type pump. Flow of the coolant through the radiator is regulated by two thermostats, fitted in parallel, in order to provide an optimum working temperature. The radiator cap incorporates a valve set at 0.5 bar (7.0 lbf in 2 ) which allows the coolant in the radiator to boil, thereby raising its boiling point. ~ { ~~ I-T IMPORTANT: The top radiator tank incorporates an expansion chamber. It is very important to fill the system in the correct way. See "Filling the System" below. The capacity of the system is 27 litres, (5 gals). KEY 1. Radiator 6. Not applicable. 2. Water pump 7. De-aeration pipe 3. Engine block 8. Radiator cap 4. By-pass 9. Expansion chamber 5. Thermostats 10. Return pipe

16 4D-01 TURBO CHARGER Operation PART 4 - SECTION D Page No. No. 2 DESCRIPTION - OPERATION OF THE TURBO-CHARGER 2 ROUTINE CARE AND MAINTENANCE 3 FAULT FINDING 3 CHART OF FAUL TS AND PROBABLE CAUSES LEADING TO INCORRECT OPERATION OF THE TURBO-CHARGER 3 ) 4D CHECKING TURBO-CHARGE PRESSURE 7 TURBO-CHARGER 4D Overhaul - Servicing (AIRESEARCH) 9 CHART OF WEAR LIMITS 12 TURBO CHARGER 4D Overhaul - Servicing (SCHWITZER) 13 -) )

17 CLUTCH Operation CLUTCH Number PART 5 - SECTION A Page Number OPERATION CUTAWAY VIEW OF THE DIAPHRAGM CLUTCH ) 5A A A A A ' 5A A A A-09-Q9 CLUTCH PEDAL AND BRACKET PUSH ROD MASTER CYLINDER Overhaul - Servicing CLUTCH RELEASE BEARING CARRIER CLUTCH RELEASE BEARING CARRIER AND SLAVE CYLINDER Overhaul - Service DIAPHRAGM CLUTCH CLUTCH HOUSING CLUTCH Bleeding Procedure / ),. This tractor is fitted with a diaphragm clutch. The clutch pedal only controls tractor movement. Constant drive is transmitted to the PTO clutch shaft by means of splines in the flywheel hub. The disc diameter is 355mm (14"). OPERATION The clutch is operated by a pedal, which in turn operates the piston of a master cylinder, via a push rod. The quantity of oil displaced by this piston causes the release bearing carrier to move. The diaphragm is then compressed and the disc released. The master cylinder is supplied with oil from the auxiliary hydraulics return circuit. See diagram, Section 88.

18 SB-01 MK II TRANSMISSION Operation No. TRANSMISSION PART 5 - SECTION B Page No. _,, ) TRANSMISSION POWER FLOW DIAGRAM SPEED CHARTS CROSS-SECTION OF GEARBOX DESCRIPTION OPERATION GEAR SHIFT LEVER AND COLUMN SHIFT CONTROL COLUMN Overhaul - Servicing SHIFT CONTROL COLUMN SPHERICAL BEARING GEARBOX CONTROL BRACKET NIA REVERSE SHUTTLE CONTROL LEVER REVERSE SHUTTLE LEVER CONTROL ROD Adjustment INSERT Replacement FLEXIBLE COUPLING SELECTOR COVER Overhaul - Servicing SHIFTER RAILS AND FORKS INPUT SHAFT LAYSHAFT OUTPUT SHAFT SYNCHROMESH UNIT Overhaul - Servicing GEAR BOX i /

19 CREEPER PRIMARY UNIT Operation CREEPER PRIMARY UNIT Page Number For Gearbox with 16 Forward and 12 Reverse Gears Number PART 5 - SECTION D ~' 5C C C C C CROSS SECTION OF CREEPER PRIMARY UNIT OPERATION CREEPER PRIMARY UNIT PLANETARY CARRIER ASSEMBLY PLANETARY SUPPORT PLANETARY CARRIER Overhaul - Servicing RING GEAR Wiring and Hydraulic Circuit Layout The primary unit is like a module attached to the front flange of the main gearbox and with the clutch cylinder and release bearing fitted to its front end. This unit enables the gearbox input shaft to be driven at two different speeds, depending on the position of the selector, and also allows its direction of rotation to be reversed. These two fun.ctions are carried out on the one hand by a sliding coupler connected to an epicyclic reduction unit located in the front section of the unit, and on the other hand by a dog-tooth coupler and constant mesh reverse gear located in the rear section. Oil is supplied to the piston chamber by a spool valve. The unit is pressure-lubricated by the transmission lubrication system. Note To service the forward and reverse shuttle section of the creeper gearbox, refer to the relevant parts, in section 5D.

20 .1u:;-:-u1 SPEEDSHIFT PRIMARY UN1f,,,iW'' y 1-t.,it / Operation Number 5D D D D D D D D D D *5D PRIMARY UNIT For Gearbox with 16 Forward and 12 Reverse Gears PART 5 - SECTION D CROSS SECTION OF PRIMARY UNIT (Manual Shuttle) OPERATION PRIMARY UNIT MUL Tl-DISC CLUTCH Overhaul - Servicing MULTI-DISC CLUTCH SUPPORT PLANETARY CARRIER Overhaul - Servicing SUN GEAR FRICTION DISC PRESSURE PLATE COMPRESSION PISTON REVERSE GEAR CLUSTER AND HOLLOW SHAFT Overhaul - Servicing Manual Shuttle CROSS SECTION OF PRIMARY UNIT (Syncromesh Shuttle) REVERSE GEAR CLUSTER AND HOLLOW SHAFT Overhaul - Servicing Syncromesh Shuttle DOUBLE REVERSE GEAR PRESSURE AND PERMISSIBLE LEAKAGE TEST Methods Page Number ; l v_~~.--s -. -~- "23 -":;:~ 24 The primary unit is like a module attached to the front flange of the main gearbox and with the clutch cylinder and release bearing fitted to its front end. This unit enables the gearbox input shaft to be driven at two different speeds, depending on the position of the selector, and also allows its direction of rotation to be reversed. These two fun-ctions are carried out on the one hand by a multi-disc clutch connected to an epicyclic reduction unit located in the front section of the unit, and on the other hand by a dog-tooth coupler and constant mesh reverse gear located in the rear section. Oil is supplied to the two piston chambers by a spool valve. The unit is pressure-lubricated by the transmission lubrication system.

21 OA-Ul CENTRE HOUSING-TRUMPET HOUSINGS Operation CENTRE HOUSING - TRUMPET HOUSINGS Page No. PART 6 - SECTION A No. r-~~., ) 01 TRUMPET HOUSING ASSEMBLY SA PLANETARY CARRIER -PLANETARY GEARS 6A Overhaul.,_ Servicing 05 RING GEAR 6A Replacement- 1st Method 07 6A Replacement - 2nd Method 08 HALF SHAFT 6A Bearing Replacement 09 WHEEL STUD 6A Replacement 10 AXLE CROSS SECTIONS 11 DIFFERENTIAL ASSEMBLY 6A A Bearing Replacement 16 DIFFERENTIAL LOCK 6A Overhaul - Servicing 16 DIFFERENTIAL HOUSING 6A Overhaul - Servicing 17 DIFFERENTIAL CROWNWHEEL 6A Replacement 18 BEVEL DRIVE PINION 6A Overhaul - Servicing 19 () i

22 tib-01 BRAKES.J ).,, Operation BRAKES Number PART 6 - SECTION B FOOTBRAKECONTROLS MASTER CYLINDERS Overhaul BRAKE ACTUATORS Inspection - Servicing HANDBRAKE CONTROL HANDBRAKE MECHANISM Overhaul - Servicing BLEEDING THE BRAKING SYSTEM Method Page Number On this type of tractor the brakes are operated hydraulically on the tractor rear wheels and, when necessary, a trailer (see hydraulic diagram, Section 88, for operation of the system). The brakes consist of two 354mm diam. sintered discs. Each disc comes into contact with a brake actuator located in the centre housing level with the trumpet housing. The braking system is fed by oil contained in the transmission housings; this oil also feeds the lift and hydrostatic steering systems. The braking system therefore has no feed tank. The tractor has a handbrake which is located on the left hand side of the seat. The brake handle actuates a disc braking mechanism located behind the gearbox on the transmission shaft, by means of a cable. )

23 tic-01 REAR POWER TAKE OFF Operation REAR POWER TAKE OFF Page Number PART 6 - SECTION C Number DESCRIPTION - OPERATION 01 LAYSHAFT 6C P.T.O. BRAKE 6C Overhaul - Servicing 03 DRIVE GEAR ASSEMBLY 6C Overhaul - Servicing 04 P.T.O. CLUTCH 6C C Overhaul - Servicing 07 6C-05A-08 Overhaul - Servicing with Integral Brake 08 P.T.O. SHAFT 6C C Replacement of Taper Roller Bearings REV/MIN GEAR ASSEMBLY 6C Inspection 12 6C Rear PTO CpUNTERSHAFT WITHOUT BRAKE 14 DESCRIPTION - OPERATION The rear p.t.o. consists of five sections: al. A primary shaft. b) A hydraulic, multi-disc clutch c) A layshaft fitted with a drive gear assembly. d) A p.t.o. shaft brake e) Two gears and 1000 rev/min - which can take a 540 or a 1000 rev/min shaft The primary shaft is splined at both ends. It is driven by the engine flywheel and goes through the gearbox inside a hollow shaft. It provides constant drive to the hydraulic clutch gear. The hydraulic clutch consists of: five splined sintered discs. four fixed steel discs, a piston and a splined hub. It is supplied with oil at low pressure 1700 N/m2 (246.5 lbf/in2 ) by a spool valve and is operated by a lever located to the right of the driver's seat. The layshaft is splined at both ends. It comprises a drive gear assembly mounted on two taper roller bearings. The p.t.o. brake is located behind the top link bracket. It consists of two "BELLEVILLE" spring washers and a piston. At rest, the piston is held against the drive gear assembly by the two spring washers, thereby immobilising the layshaft. When oil is supplied to the hydraulic clutch, the piston is pressurized by oil which passes through a bypass connector; it therefore compresses the two spring washers and releases the drive gear assembly. Two 540 and 1000 rev/min gears which can drive either a 6-spline 540 rev/min shaft or a 21-spline 1000 rev/min shaft are located at the bottom of the housing in line with the output shaft.

24 6D-01 FRONT POWER TAKE OFF Operation FRONT POWER TAKE OFF Page Number PART 6 - SECTION D Number DESCRIPTION 01 PTO HOUSING 6D UPPER SHAFT 6D HYDRAULIC CLUTCH 6D Overhaul - Servicing 08 PTO SHAFT 6D Overhaul - Servicing 09 COUPLING 6D D HYDRAULIC CONNECTIONS FOR FRONT MOUNTED PTO Kit Fitment 13 DESCRIPTION: The front p.t.o. housing is located at the front of the tractor under the weight frame. It consists of three main parts: a) An input shaft (10) fitted with a hydraulically operated clutch and a drive gear (57) driven by the engine flywheel. b) An idler gear (46). c) A p.t.o. shaft (30) integral with the output gear (34) which transmits the drive to the implement connected to the front of the tractor.

25 /A-Ul FRONT AXLE 2WD. 2WD FRONT AXLE Operation PART 7 - SECTION A Page Number No. 02 FRONT TRACK WIDTH 7A Adjustment 03 7A Toe-In Adjustment., 04 FRONT WHEEL HUBS 7A-03-Q5 Removal - Servicing - Refitment 05 7A-04-Q6 Removal - Servicing - Refitment certain Territories only 06 AXLE SPINDLE 7A Removal - Servicing - Refitment 07 ) 7A Removal - Servicing - Refitment certain Territories only 08 AXLE SPINDLE SUPPORT ARM 7A Removal - Servicing - Refitment 09 AXLE CROSS BEAM FRONT SUPPORT 7A A Bush Replacement 10 AXLE CROSS BEAM 7A FRONT AXLE SUPPORT CASTING 7A A Replacement of pivot bush in front axle 11

26 78-01 FRONT AXLE Operation FRONT AXLE Page Number PART 7 - SECTION B Number DESCRIPTION 02 CUTAWAY VIEW OF DIFFERENTIAL 03 CUTAWAY VIEW OF A FINAL DRIVE UNIT 04 FRONT AXLE FRONT AXLE BRACKET FRONT BEARING, REAR BEARING AND AXLE FRONT PIVOT PIN AND BEARING FRONT AXLE PIVOTING STOP HYDRAULIC CLUTCH CONTROL LEVER HYDRAULIC CLUTCH CONTROL VALVE CLUTCH HOUSING HYDRAULIC CLUTCH Overhaul - Servicing 10 TRANSM.ISSION SHAFT GUARD FOUR WHEEL DRIVE TRANSMISSION SHAFT REAR HUB BEVEL DRIVE PINION CROWNWHEEL AND PINION, DIFFERENTIAL AND HYDRAULIC DIFFERENTIAL LOCK ASSEMBLY CROWNWHEEL DIFFERENTIAL Overhaul - Servicing 18 HYDRAULIC DIFFERENTIAL LOCK Overhaul - Servicing 19 HALF-SHAFT AND DOUBLE UNIVERSAL JOINT UNIVERSAL JOINT Overhaul - Servicing 21

27 FRONT AXLE Operation Number BEARING HOUSING UNIVERSAL JOINT HOUSING AND PIVOT PINS (Earlier Models) SPINDLE UNIVERSAL JOINT HOUSING SEAL FINAL DRIVE UNIT Overhaul - Servicing Replacement of a Planetary Pinion RING GEAR AND REDUCTION HUB. TRACKRODAND8ALLENDS FRONT FENDER 4WD FRONT AXLE PIVOT HOUSING (Later Models) Servicing Page Number j DESCRIPTION The four wheel drive equipment consists of : a clutch housing located under the gearbox, a transmission shaft connected by two sliding couplers, and a front axle fitted with driving and steering wheels, which can be split up into three sub-assemblies : differential and crownwheel and pinion, universal joints and final drive units. Clutch housing : this housing comprises a gear which engages with the range shift gear, a hydraulic clutch pack and an output shaft. Transmission shaft : This shaft has splined ends and is connected to the output shaft and to the front axle bevel drive pinion by means of splined coupling sleeves. Each sleeve is secured by a set-screw. The transmission shaft is protected by a guard secured at each end. The front axle is secured under the front of the tractor by means of two bearings which allow it to swing. On the back of the axle, on the left-hand side, there is an anchor point for attaching a double acting hydraulic ram which operates the steering. The front axle contains the crownwheel and pinion, the differential, the hydraulic differential lock and the two half-shafts. There is an epicyclic final drive unit with three planetary gears at each end of the axle. These final drive units and the half-shafts are. connected by means of a double universal joint. The front axle hydraulic differential lock is supplied with oil at the same time as the rear axle diff. lock through a pedal-operated spool valve. \

28 7C-01 STEERING STEERING Operation PART 7 - SECTION C Page Number Number DESCRIPTION - OPERATION 02 HYDRAULIC STEERING 7C C Overhaul - Servicing 05 ORBITROL CONNECTION LAYOUT 7C Steering Ram Setting 07 7C Adjustment 08 TRACK ROD 7C TRACK ROD END BALL JOINTS 7C C WD WHEEL TRACK ADJUSTMENT 08 4WD STEERING CYLINDER (Earlier Models) 7C C Overhaul - Servicing 10 4WD STEERING CYLINDER (Later Models) 7C C Overhaul - Servicing 12 STEERING WHEEL ASSEMBLY 7C C Replacement of Bearings 13 STEERING WHEEL ASSEMBLY 7C TELESCOPIC STEERING WHEEL ASSEMBLY 7C Overhaul - Servicing 15 BEARING HOUSING ASSEMBLY 7C Overhaul - Servicing 16 2WD STEERING CYLINDER 7C C Overhaul - Servicing 17

29 7D-01 WHEELS AND TYRES Operation Number WHEELS AND TYRES PART 7 - SECTION D Page Number 7D D D D D REAR WHEEL 02 INNER TUBE 03 TYRES 05 P.A.V.T. WHEEL CLAMP Replacement of Clamps 06 TRACK WIDTH Adjustment of a P.A.V.T. Wheel 07 WHEEL BOLT AND NUT TORQUES 08 Rim clamping procedure for manually adjusted cast wheel centres FAULT FINDING CHART 10 The 2005 series tractor are fitted with steel wheel discs and P.A.V.T wheels are available as an option, depending on model. As the rim to disc fixing points are offset, 8 different track widths are obtainable on the rear axle, 8 different track widths are obtainable on the 4WD front axle. A table of track widths is given at the end of this section. 4 different track widths are obtainable on the 2WD front axle with the three-hole fixing system (normal centre beam); 2 different positions are obtainable with the two-hole fixing system (long centre beam). A table of track widths is given at the end of this section.

30 BA-01 HYDRAULIC LIFT SYSTEM 'ii } HYDRAULIC LIFT SYSTEM Operation PART 8 - SECTION A Page No. No SA SA SA SA SA HYDRAULIC LIFT SYSTEM 02 DESIGN AND OPERATION OF THE HYDRAULIC LIFT SYSTEM - Hydraulic Part (Control Valve) 02 DESIGN AND OPERATION OF THE HYDRAULIC LIFT SYSTEM - Mechanical Part (Control Linkages) 04 SIDE COVER AND LIFT CONTROL LEVERS 09 TOP CONSOLE COVER AND CONTROL LEVER STOPS 10 LIFT CONTROL LINKAGE RODS 10 REAR CONTROL COVER 11 REAR CONTROL COVER LINKAGES 14 HYDRAULIC LIFT CONTROL VALVE SA SA Overhaul - Servicing 15 LIFT RAMS SA SA Overhaul - Servicing 17 LIFT COVER SA LIFT COVER CONTROL LINKAGES SA SENSING SHAFT SEALS SA "I,. SENSING SHAFT J SA SENSING ARM AND ROLLERS SA SENSING SHAFT (ELC MODELS) SA SENSING SHAFT SEALS (ELC MODELS) SA LIFT CYLINDER LOWER MOUNTING TUBE (ELC MODELS) SA REAR CONTROL COVER ASSEMBLY (ELC MODELS) SA ELECTRONIC LIFT CONTROL (ELC) VALVE SA LIFT COVER (ELC MODELS) SA ELECTRONIC INFORMATION MANUAL

31 SA-01 HYDRAULIC LIFT SYSTEM HYDRAULIC LIFT SYSTEM Operation PART 8 - SECTION A Page No. No SA HYDRAULIC LIFT SYSTEM 02 DESIGN AND OPERATION OF THE HYDRAULIC LIFT SYSTEM - Hydraulic Part (Control Valve) 02 DESIGN AND OPERATION OF THE HYDRAULIC LIFT SYSTEM - Mechanical Part (Control Linkages) 04 SIDE COVER AND LIFT CONTROL LEVERS 09 '0 SA TOP CONSOLE COVER AND CONTROL LEVER STOPS SA LIFT CONTROL LINKAGE RODS SA SA REAR CONTROL COVER 11 REAR CONTROL COVER LINKAGES 14 HYDRAULIC LIFT CONTROL VALVE SA SA Overhaul - Servicing 15 LIFT RAMS SA SA Overhaul - Servicing 17 LIFT COVER BA LIFT COVER CONTROL LINKAGES BA SENSING SHAFT SEALS BA SENSING SHAFT BA SENSING ARM AND ROLLERS BA SENSING SHAFT (ELC MODELS) BA SENSING SHAFT SEALS (ELC MODELS) BA LIFT CYLINDER LOWER MOUNTING TUBE (ELC MODELS) BA REAR CONTROL COVER ASSEMBLY (ELC MODELS) BA ELECTRONIC LIFT CONTROL (ELC) VALVE BA LIFT COVER (ELC MODELS) BA ELECTRONIC INFORMATION MANUAL MF2005 Series Tractors Issue 1

32 ./ ) The purpose of this publication is to enable Massey Ferguson's Dealers and Distributors to operate and service the Electronic Linkage Control introduced with the MF 2005 range of tractors. It consists of a series of detailed tests, adjustments and functional checks, which should be performed as a part of pre-delivery inspection and in the event of repair becoming necessary. The instructions make frequent reference to the the MF test unit, and Dealers and Distributors must make use of this equipment, available from Massey-Ferguson. If replacements should ever be required, it is imperative that only genuine Massey-Ferguson parts are used, since damage to the electronics is liable if parts of inferior quality are used. For further information, contact: Massey-Ferguson (U.K) Ltd., Customer Service Department, Stareton, Nr. Kenilworth, Warwickshire CV8 2LJ. Phone: Coventry (0203) Ci:>ntents Introduction 2 System components Hydraulic pump 3 Tractor battery 3 Electro-hydraulic control valve 3 Draft sensors 3 Position sensors 3 Control panel 3 Control computer 3 Control description Lift control switch 4 Function selector 4 Depth control 4 Sensitivity control 4 Maximum height control 4 Lower link liwlower lights 4 E.L.C. operation Attaching implement 5 Setting max. height 5 Transport 5 Ploughing/tillage 5 Headland turn 5 Summary 6 Electronic components Control computer 7 Linear induction sensors 7 Draft sensors 8 Position sensor 8 Linkage control valves 9 Electronic circuit General circuit 12 Computer supply 14 Solenoids/L.E.D. indicators 15 External buttons 16 Sensors 17 Controls 18 Service procedure Troubleshooting guide 19 Manual linkage activation 20 Functional checks 20 Electronic testing 22 Electronic diagnosis 24 Control testing and replacement 25 External control relay 27 Linkage relay 27 Draft sensors 28 Position sensor 28

33 8B-01 AUXILIARY HYDRAULICS Operation AUXILIARY HYDRAULICS Page No. PART 8 - SECTION B No. 04 SPECIFICATIONS 05 DIAGRAM OF HYDRAULIC CIRCUIT FLOW KEY ALL MODELS 06 DIAGRAM OF HYDRAULIC CIRCUIT FLOW Series 07 DIAGRAM OF HYDRAULIC CIRCUIT FLOW 3500 Series OT DIAGRAM OF HYDRAULIC CIRCUIT - KEY ALL MODELS 08 DIAGRAM 2000 MECHANICAL LIFT CONTROL 08 High Pressure Circuit 09 Low Pressure Circuit 10 Lubrication Circuit 11 DIAGRAM 2005 ELECTRONIC LIFT CONTROL 12 High Pressure Circuit 13 Low Pressure Circuit 14 Lubrication Circuit 15 " DIAGRAM OF HYDRAULIC CIRCUIT 3500 SERIES EARLIER MODELS 16 DIAGRAM OF HYDRAULIC CIRCUIT 3500 SERIES LATER MODELS 17 DESIGN AND OPERATION OF THE TRAILER BRAKING SPOOL 19 LEFT-HAND HYDRAULIC COVER Replacement 21 FILTER INTAKE MANIFOLD FILTER HEAD FILTER ELEMENT Removal and Hefitment 23 RIGHT-HAND HYDRAULIC COVER \ ;,' Replacement 25 HYDRAULIC PUMP DRIVE GEAR HYDRAULIC PUMP INTAKE MANIFOLD HYORAULIC PUMP Overhaul - Servicing 27 LOW PRESSURE CIRCUIT RELIEF VALVE Removal - Overhaul - Servicing - Refitment 29 HIGH PRESSURE CIRCUIT RELIEF VALVE Removal - Overhaul - Servicing - Refitment 30 TRAILER BRAKING SPOOL, VALVE Overhaul - Servicing 32 AUXILIARY SPOOL VALVE CONTROL LEVERS SPOOL VALVE CONTROL LINKS AUXILIARY SPOOL VALVES Overhaul - Servicing 37 QUICK COUPLERS

34 AUXILIARY HYDRAULICS Operation No. p.t.o. SPOOL CONTROL LEVER p.t.o. SPOOL CONTROL LEVER p.t.o. SPOOL CONTROL ROD DIFFERENTIAL LOCK SPOOL CONTROL PEDAL Removal and Refjtment 39 DIFFERENTIAL LOCK AND p.t.o. SPOOL VALVE BODY REAR p.t.o. CLUTCH CONTROL VALVE Overhaul - Servicing 41 DIFFERENTIAL LOCK CONTROL VALVE Overhaul - Servicing 42 PRIMARY UNIT MULTI-DISC,CLUTCH CONTROL VALVE COVER Remo.val and Refitment 43 SOLENOID CONTROL VALVES LUBRICATION VALVE ADAPTOR PLATE AND RELIEF VALVE OIL COOLER STEERING FLOW PRIORITY VALVE Overhaul - Servicing 47 Fl~TER HOUSING N.A. MF3500 and Late N.A. MF FILTER HOUSING N.A. Early MF FILTER HEAD LEFT HAND AUXILIARY CONTROL LINKAGE AUXILIARY SPOOL VALVE CONTROL LINKS TOP BEARING, THREE SPOOL INSTALLATION LEFT HAND AUXILIARY SPOOL VALVE LEFT HAND AUXILIARY VALVE Overhaul - Servicing 53 LEFT HAND AUXILIARY VALVE MAIN RELIEF VALVE Overhaul - Servicing 55 LEFT HAND HYDRAULIC COVER LEFT HAND HYDRAULIC COVER Replacement 56 HYDRAULIC PUMP AND INTAKE MANIFOLD LEFT HAND HYDRAULIC PUMP Overhaul - Servicing 57 AUXILIARY SPOOL VALVE - 3rd SPOOL (certain Territories only) AUXILIARY SPOOL VALVE - 3rd SPOOL Overhaul - Servicing 58 AUXILIARY VALVE - 3rd SPOOL- KICKOUT Kickout Adjustment 61 Page No.

35 8B-03 AUXILIARY HYDRAULICS ) Operation No. LEFT HAND AUXILIARY SPOOL VALVE - RELIEF VALVE 8B Adjustment 61 LEFT HAND AUXILIARY SPOOL VALVE- KICKOUT 8B Adjustment 61 TEST POINTS High Pressure Services 2000/ Low Pressure Services 2000/ Cooling and Lubrication 2000/ Page No. TEST POINTS High Pressure Services Low Pressure Services Cooling and Lubrication TABLE OF UNIONS.AND ACCESSORIES 65 HIGH PRESSURE CIRCUIT TEST 8B-5Q-66 Method 66 HIGH PRESSURE PUMP FLOW TEST 8B-50a-66 Method 66 HYDRAULIC LIFT TEST BB Method 67 HYDRAULIC LIFT CONTROL VALVE LEAKAGE TEST 8B Method 67 HYDRAULIC TRAILER BRAKING CIRCUIT TEST 8B Method 68 BRAKE LUBRICATION FLOW TEST 8B-53a-68 Method 68 LOW PRESSURE CIRCUIT TEST 8B Method 70 LOW PRESSURE CIRCUIT BASIS SYSTEM TEST 8B-54a-70 Method 70 LOW PRESSURE PUMP FLOW TEST 8B-54b-70 Method 70 PRESSURE MAINTAINING VALVE TEST (Low Pressure System) 8B-54c-70 Method 70 GEARBOX LUBRICATION CIRCUIT TEST 8B Method 71 STEERING RAM PRESSURE TEST BB Method 72 STEERING CIRCUIT LEAKAGE TEST 8B Method 72 PUMP FLOW AND STEERING PRIORITY FLOW VALVE Test 73 TRANSMISSION OIL COOLER FLOW TEST 8B Method 73 TRANSMISSION OIL COOLER CIRCUIT SAFETY VALVE PRESSURE 8B Test 73 IPTO MODULATION TEST 8B Method 74 RIGHT HAND AUXILIARY SPOOL VALVE MF3500 Series only 8B Pump Flo~ and Valve Test 74 LEFT HAND AUXILIARY SPOOL VALVE MF3500 Series only 8B Pump Flow and Valve Test 74

36 9A-01 ELECTRICAL SYSTEM Operation ELECTRICAL SYSTEM Page Number PART 9 - SECTION A Number 01 MAIN WIRING DIAGRAM KEY 04 MAIN WIRING DIAGRAM 05 CREEPER GEARBOX WIRING DIAGRAM 06 LIGHTING WIRING DIAGRAM KEY 07 PLATFORM LIGHTING DIAGRAM 07 EUROPEAN LIGHTING DIAGRAM GERMAN LIGHTING DIAGRAM 08 NORTH AMERICAN LIGHTING DIAGRAM BATTERIES 9A Removal - Inspection - Refitment 09 ALTERNATOR 9A ; 9A-03-:11 Regulator Replacement A Brush Carrier Replacement 11 9A Brush Carrier Inspection 12 9A Overhaul - Servicing 13 STARTER MOTOR 9A STARTER MOTOR SOLENOID 9A STARTER MOTOR 9A Servicing 19 STARTER MOTOR, END COVER AND BRUSH CARRIER 9A-10a-19a Service, Test and Inspection 19A STARTER MOTOR SWITCH 9A SAFETY START SWITCH 9A LIGHT SWITCH AND HORN PUSH 9A A Not applicable 22.. \ WINDSCREEN WIPER SWITCH ) 9A BLOWER SWITCH 9A HAZARD WARNING LIGHT SWITCH 9A HAZARD WARNING LIGHT FLASHER UNIT 9A A Not applicable 24 PLOUGH LAMP SWITCH 9A WATER TEMPERATURE GAUGE 9A A Not applicable 25 TRACTORMETER 9A WINDSCREEN WIPER MOTOR 9A STARTER MOTOR 9A Operational Checks 18 BLOWER MOTOR 9A CIGAR LIGHTER 9A A OBA

37 9A-U2 ELECTRICAL SYSTEM HEADLIGHTS 9A A Beam Adjustment POWER SOCKET 9A HEADLIGHT BULB 9A PLOUGH LAMP BULB 9A NUMBER PLATE LIGHT BULB 9A CAB INTERIOR LIGHT BULB 9A FRONT DIRECTION INDICATOR/SIDE LIGHT CLUSTER BULB 9A REAR DIRECTION INDICATOR/REAR LIGHT/ BRAKE LIGHT CLUSTER BULB 9A WARNING LIGHT COVER 9A WARNING LIGHT BULB 9A WATER TEMPERATURE GAUGE SENDER UNIT 9A ENGINE OIL PRESSURE SWITCH 9A AIR FILTER CLOGGING INDICATOR PRESSURE SWITCH 9A LOW PRESSURE CIRCUIT OIL PRESSURE SWITCH 9A A REARp.t.o.CIRCUIT OIL PRESSURE SWITCH DIFFERENTIAL LOCK OIL PRESSURE SWITCH 9A GEARBOX LUBRICATION OIL PRESSURE SWITCH 9A TRANSMISSION OIL FIL TEA DEPRESSION SWITCH 9A LIGHTING SYSTEM FUSES 9A CAB LIGHTING/WINDSCREEN WIPER/BLOWER FUSES 9A-47-, CIGAR LIGHTER FUSE 9A HORN FUSE 9A HORN. 9A ETHER START SWITCH 9A ETHER START ASSEMBLY 9A ETHER START ASSEMBLY 9A Kit Fitment 35 ELECTRONIC LIFT CONTROL DASH PANEL 9A ELECTRONIC LIFT CONTROL WIRING HARNESS Diagrams 38 REAR SCREEN WIPER ASSEMBLY 9A Kit Fitment 40

38 LINKAGE Operation Number LINKAGE PART 10 - SECTION A Page Number ) 10A A A A A A A A A A ADJUSTABLE TOWING HITCH ("LEMOINE" Type) Overhaul - Servicing TOWING HITCH BRACKET SWINGING DRAWBAR SWINGING DRAWBAR BRACKET ASSEMBLY STABILIZER PAD AND GUIDE LOWER LINK ''WALTERSCHEID" LINK ENDS Inspection - Servicing LIFT ROD Overhaul - Servicing TOP LINK RETAINING HOOK ASSEMBLY Inspection TOP LINK Overhaul - Servicing " 10A A LOWER LINK BALL ENDS AND LATCH WE.STERN ROLLER DRAWBAR ) The linkage comprises three assemblies: an adjustable towing hitch, a swinging drawbar assembly, a th.reepoint linkage. The adjustable towing hitch is secured to a multi-hole bracket by means of two pins and 1inch pins. The swinging drawbar pivots on a spindle secured to the underside of the rear axle housing and is supported hori2:ontally by a four-hole bracket. These holes enable the drawbar to be set in three different positions and secured by means of two pins and two 1inch pins. A stabilizer pad and guide are fitted to each side of the swinging drawbar bracket. The three-point linkage comprises: a). A turnbuckle type adjustable top link with semi-automatic ho.ok type ends, and a retaining hook assembly for when it is not in use. b) Two lower links with automatic hook type ends...