John Deere MODEL: 4320 Tractor THIS IS A MANUAL PRODUCED BY JENSALES INC. WITHOUT THE AUTHORIZATION OF JOHN DEERE OR IT'S SUCCESSORS. JOHN DEERE 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. JD-S-TM1029
4320 Tractor TECHNICAL MANUAL 4320 Tractor TM1029 (01 DEC74) English John Deere Tractor Works TM1029 (01DEC74) LITHO IN U.S.A. ENGLISH
1 CONTENTS 4320 TRACTOR TECHNICAL MANUAL TM-1029 (Aug-70) SECTION 10 - GENERAL Group 5 - Specifications Group 10 - Predel ivery, Delivery, and After-Sale Services Group 15 - Tune-Up Group 20 - Lubrication Group 25 - Separation SECTION 20 - ENGINE Group 5 - General Information, Diagnosis, and Tests Group 10 - Cylinder Head, Valve Train, and Camshaft Group 15 - Cylinder Block, Liners, Pistons, and Rods Group 20 - Crankshaft, Main Bearings, and Flywheel Group 25 - Lubrication System Group 30 - Cooling System SECTION 30 - FUEL SYSTEM Group 5 - Diagnosing Malfunctions Group 10 - Fuel I njection System Group 15 - Air I ntake System SECTION 40 - ELECTRICAL SYSTEM Group 5 - Information and Wiring Diagrams Group 10 - Charging Circuit Group 15 - Starting Circuit Group 20 - Lighting and Accessory Circuits SECTION 50 - POWER TRAI N Group 5 Syncro-Range Transmission and PTO Clutches Group 10 - Syncro-Range Transmission Group 15 - Differential Group 20 - Final Drive Group 25 - PTO Group 30 - Power Front-Wheel Drive SECTION 60 - STEERING AND BRAKES Group 5 - General Information SECTION 70 - HYDRAULIC SYSTEM Group 5 - General I nformation, Diagnosis, and Tests Group 10 - Main Reservoir, Filters, Valves, Oil Cooler, and Oil Reservoir Group 15 - Hydraulic Pumps Group 20 - Power Steering Group 25 - Power Brakes Group 30 - Rockshaft and I mplement Hitches Group 35 - Selective Control Valve, Breakaway Couplers, and Remote Cylinders SECTION 80 - MISCELLANEOUS Group 5 - Conventional Front Axle Group 10 - Power Front Wheel Drive Axle
TM-1029 (Aug-70) General 10 - Specifications 5-1 Section 10 GENERAL GROUP 5 - SPECIFICATIONS GROUP 20 - LUBRICATION (ConL) General Tractor Specifications... 5-1 Greases... 20-2 GROUP 10 - PREDELIVERY, DELIVERY, Storing Lubricants... 20-2 AND AFTER-SALE SERVICES GROUP 25 - SEPARATION Predel ivery Services... " 10-1 Removing Roll-Gard Cab... 25-1 Delivery Services... 10-3 Installing Roll-Gard Cab... 25-2 After-Sale Services... " 10-4 Separating Engine from Clutch Housing... 25-2 GROUP 15 - TUNE-UP Separating Clutch Housing from Preliminary Engine Testing... 15-1 Syncro-Range transmission.,... 25-4 Engine Tune-Up... 15-1 Removing Engine... 25-5 Final Engine Test... 15-3 Separating Engine from Front End... 25-6 Tractor Tune-Up... 15-3 Removing Final Drive Assembly... 25-7 GROUP 20 - LUBRICATION Specifications... 25-8 Lubrication Chart... 20-1 Torques for Hardware... 25-8 Engine Lubricating Oils... 20-2 Special Tools... 25-8 Transmission-Hydraulic Oil... 20-2 HORSEPOWER: Observed at PTO... 115 ENGINE: Type... 6-cylinder, in-line, valve-in-head, diesel, turbocharged Bore and stroke... 4-114 in. x 4-314 in. Displacement..., 404 cu. in. Compression ratio... 15.7 to 1 Firing order..................... 1-5-3-6-2-4 Valve clearance... Intake-0.018 in. Exhaust-0.022 in. I njection pump timing... TDC Engine Speeds: Working range... 1500 to 2200 rpm Maximum transport speed... 2500 rpm Engine speeds: Slow idle... 800 rpm 1900 rpm load... 2150 rpm idle 2200 rpm load... 2400 rpm idle 2500 rpm load... 2650 rpm idle LUBRICATION SYSTEM: Full pressurized with full-flow micronic oil filter, water cooled oil cooler, and bypass valves for filter and cooler. Group 5 GENERAL TRACTOR SPECIFICATIONS FUEL SYSTEM: Type... Direct injection Filter... Two-stage with replaceable impregnated paper element. I njection pump type... I nlet metering, distributing type Air cleaner.. Dry type with safety element COOLI NG SYSTEM: Type... Pressurized with centrifugal pump Temperature control.............. Heavy-duty thermostat CAPACITI ES: Fuel tank..., 44 U.S. gals. Cooling system... " 28 U.S. qts. Crankcase (with filter change)... 16 U.S. qts. Transmission-hydraulic system (add 4-1/2 gals. to capacity if equipped with Power Front Wheel Drive)..., 14 U.S. gals. TRANSMISSION: Type... Syncro-Range, constant mesh Clutch... Heavy-duty, 13-1/2 in. plate, foot operated Gear selections... 8 forward and 2 reverse Shifting... 4 stations, synchronized forward shifting within stations
TM-1029 (Aug-70) General 10 Separation 25-5 Bleed brakes (Section 70, Group 25) and recheck transmission oil level. REMOVING ENGINE Separate tractor between engine and clutch housing as previously instructed. Fig. 11-Thrust Washer in Position Mesh the PTa and transmission drive when joining the tractor. Tighten all cap screws and remove support stands. Install PTa shaft front bearing quill. Pour oil in transmission and install transmission cover. Fig. 12-Right-Hand Side ot Engine Connect hydraulic oil pressure pipe to rockshaft housing. Connect differential lock control link. Connect brake return pipe and right- and left-hand brake pipes. Connect shifter rods. Tap arms inward to obtain specified end play. Connect wiring harness and install battery cable clamps. Install oil temperature sensing bulb. Connect main hydraulic pump inlet pipe and steering return pipe. I nstall platform and differential lock pedal pivot pin. Connect clutch pedal return spring. Connect Power Front-Wheel Drive drain pipe (Fig. 7). I nstall battery box supports. I nstall battery boxes and connect batteries. Make ground connection last and tap cable on battery post first. Fig. 13-Lett-Hand Side of Engine 1. Remove the turbocharger air intake pipe and vertical support strap. Remove the water pump bypass pipe. 2. Disconnect wiring harness from the fuel shut-off solenoid, alternator, starter solenoid, and the oil pressure switch. Place wiring harness out of the way for engine removal. 3. Close fuel tank shut-off valve and disconnect fuel pump inlet pipe. Disconnect diesel fuel leak-off pipe.
TM-1029 (Dec-74). Basic Engine 20 General Information and Diagnosis 5-1 Section 20 ENGINE GROUP 5 - GENERAL INFORMATION AND DIAGNOSIS General Information... 5-2 Diagnosis... 5-2 Engine Break-In... 5-4 GROUP 10 - CYLINDER HEAD, VALVES AND CAMSHAFT General Information... 10-1 Diagnosing Malfunctions... 10-1 Cylinder Head and Valves Removal and Repair................... 10-2 Assembly and Installation... 10-4 Camshaft Removal... 10-4 Repair and Installation... 10-5 Specifications............................ 10-5 GROUP 15 - CYLINDER BLOCK, LINERS, PISTONS AND RODS General Information... 15-1 Diagnosing Malfunctions... 15-1 Removal................................. 15-2 Repair Pistons................................ 15-2 Rods... 15-3 Liners................................. 15-3 Block... 15-4 Assembly... 15-4 Installation... 15-4 Specifications............................ 15-5 GROUP 20 - CRANKSHAFT, MAIN BEARINGS, AND FLYWHEEL General Information... 20-1 Diagnosing Malfunctions... 20-1 Removal................................. 20-1 Inspection and Repair Crankshaft and Flywheel... 20-1 Main Bearings... 20-2 Damper Pulley......................... 20-2 Rear Crankshaft Oil Seal, Housing, Wear Sleeve......................... 20-3 Front Oil Seal and Wear Sleeve... 20-3 Assembly Main Bearings......................... 20-2 Rear Oil Seal, Wear Sleeve, and Housing... 20-3 Front Oil Seal and Wear Sleeve........ 20-3 Installation............................... 20-4 Specifications............................ 20-5 GROUP 25 - LUBRICATION SYSTEM General Information... 25-1 System Testing... 25-1 Diagnosing Malfunctions... 25-2 Oil Pump Removal and Repair................... 25-2 Assembly and Installation... 25-3 Oil Filter Inspection and Repair... 25-3 Oil Regulating Valves Inspection and Repair............................ 25-3 Oil Cooler Inspection and Repair... 25-3 Oil Cooler Installation... 25-4 Specifications............................ 25-4 GROUP 30 - COOLING SYSTEM General Information... 30-1 Radiator and Fan Inspection and Repair... 30-1 Water Pump Removal... 30-1 Disassembly and Inspection... 30-2 Assembly.............................. 30-2 Installation... 30-3 Water Manifold and Thermostat... 30-3 Specifications... 30-4 Litho in U. S.A.
TM-1029 (Aug-70) Fuel System 30 Diagnosing Malfunctions 5-1 Section 30 FUEL SYSTEM GROUP 5 - DIAGNOSING MALFUNC- TIONS..., 5-1 GROUP 10 - FUEL INJECTION SYSTEM Fuel Tank... 10-1 Fuel Pump............................ 10-1 Fuel Filter............................ 10-1 Fuel I njection Pump General Information................ 10-1 Removal... 10-1 Repair............................. 10-1 Installation... 10-1 Adjustments... 10-2 Fuel I njection Nozzles... 10-3 Specifications......................... 10-4 Special Tools.......................... 10-4 GROUP 15 - AIR INTAKE SYSTEM Air Cleaner... 15-1 Turbocharger General Information................ 15-1 Diagnosis... 15-2 Repair............................. 15-3 Specifications......................... 15-5 Special Tools.......................... 15-6 Group 5 DIAGNOSING MALFUNCTIONS GENERAL INFORMATION The following is a guide for diagnosing fuel system malfunctions. For specific diagnosis of fuel system components, refer to the groups which cover complete servicing. Fuel Not Reaching Injection Nozzles Filter clogged. Fuel line clogged or restricted. Electrical shut-off does not work. Fuel too heavy at low temperatures. Low transfer pump pressure. High pump housing pressure. Throttle not in correct position. Air in system. Fuel tank valve shut off. Return line restricted. Engine Starts Hard or Won't Start Air leak on suction side of system. Fuel too heavy at low temperatures. Injection nozzles faulty or sticking. Incorrect timing. Automatic advance is faulty or not operating. Water in fuel. Filte~ clogged. Injection pump return fuel line or fittings restricted. Low cetane fuel. Engine Starts and Stops Electrical shut-off does not work. Air leak on suction side of system. Filter clogged. Fuel lines clogged or restricted. Water in fuel. Injection pump return fuel line or fittings restricted. Key switch corroded. Erratic Engine Operation Filter clogged. One or more connector screws obstructed. Air leak on suction side of system. Fuel too heavy at low temperatures. I njection nozzles faulty or sticking. Fuel lines clogged or restricted. I ncorrect timing. Automatic advance faulty or not-ep.erating. Water in fuel. Injection pump return fuel line or fiwflgs restricted. Low cetane fuel. I njection nozzle return lines cloqg~d.
TM-1029 (Dec-74) Electrical System 40 Information and Diagrams 5-1 Section 40 ELECTRICAL SYSTEM GROUP 5 - INFORMATION AND DIAGRAMS General Information... 5-2 Circuit Breakers... 5-3 Fuse... 5-3 Key Switch... 5-3 Harness Replacement... 5-3 Wiring Diagrams... 5-3 Battery Connections... :............. 5-13 Power Front-Wheel Drive... 5-13 Electrical Remote Control................. 5-14 Specifications............................ 5-16 GROUP 10 - MOTOROLA CHARGING CIRCUIT General Information... 10-1 Diagnosis and Tests...................... 10-1 Repair................................... 10-3 Slip Ring Bearing... 10-3 Drive End Bearing... 10-4 Rotor... 10-5 Brushes................................. 10-6 Diodes....... 10-6 Stator... 10-6 Assembly... 10-6 Tests After Assembly..................... 10-7 Installation... 10-8 Specifications............................ 10-8 GROUP 12 - DELCOTRON CHARGING CIRCUIT General Information... 12-1 Diagnosis and Tests...................... 12-3 Repair................................... 12-3 Drive End Bearing... 12-3 Slip Ring Bearing........................ 12-4 Diode Trio... 12-4 Rectifier Bridge... 12-5 Brush Assembly and Regulator... 12-5 Rotor... 12-5 Stator................................... 12-5 Assembly................................ 12-6 Tests After Assembly..................... 12-6 Installation... 12-6 Specifications 12-7 GROUP 15 - DELCO-REMY STARTING CIRCUIT General Information......... 15-1 Start-Safety Switch Adjustment....... 15-1 Diagnosis and Tests................... 15-1 Repair................................... 15-3 Solenoid Switch... 15-4 Overrunning Clutch Drive................. 15-4 Bushings... 15-4 Armature... 15-4 Field Coils... 15-4 Brushes... 15-4 Assembly... 15-4 Pinion Clearance....................... 15-5 Installation............................... 15-5 Specifications......................... 15-5 GROUP 17 - JOHN DEERE STARTING CIRCUIT General Information... 17-1 Diagnosis and Tests... 17-1 Start-Safety Switch Adjustment............ 17-2 Repair... 17-2 Bushings... 17-4 Armature... 17-4 Overrunning Clutch Drive... 17-4 Field Coils............................... 17-4 Brushes................................. 17-4 Solenoid ~................................ 17-5 Assembly... 17-5 Installation... 17-5 Specifications... 17-6 GROUP 20 - LIGHTING AND ACCESSORY CIRCUITS Lights................................... 20-1 Instrument Lighting... 20-1 Diagnosis and Tests... 20-1 Light Switch... 20-2 Light Adjustment... 20-2 Accessories and Instruments... 20-2 Fuel Gauge... 20-2 Injection Pump Solenoid.................. 20-2 Horn... 2~3 Heating and Air Conditioning Controls............................... 20-3 Additional Accessories... 20-3 Specifications... 20-4 Litho in U. S.A.
TM-1029 (Oec-74) Power Train 50 Clutches for Syncro-Range Transmission and PTO 5-1 GROUP 5 - CLUTCHES FOR SYNCRO RANGE TRANSMISSION AND PTO General Information '"..... 5-1 Diagnosing Malfunctions..... 5-1 Shafts and Controls Removal... Repair Adjustment.. Clutch Assembly.... 5-2.5-3.... 5-6 Removal.......... 5-8 Repair................... 5-8 Installation... 5-9 Specifications... 5-10 Special Tools......................... 5-11 GROUP 10 - SYNCRO-RANGE TRANSMISSION General Information........ 10-1 Diagnosing Malfunction................... 10-4 Removal... 10-4 Repair... 10-6 Installation... 10-8 Adjustment........................ 10-10 Specifications........................... 10-10 Special Tools.................... 10-11 GROUP 15 - DIFFERENTIAL General Information.... Removal... ".... 15-1 15-1 Section 50 POWER TRAIN Repair.... Adjustment and Testing Specifications................ GROUP 20 - FINAL DRIVE Removal Repair.... Installation. Specifications.... Special Tools.. 15-1 15-3 15-4 20-1 20-1 20-2 20-2.. 20-2 GROUP 25 - SYNCRO-RANGE PTO General Information.................. 25-1 Diagnosing Malfunction................. 25-1 Removal... 25-1 Repair.... 25-1 Specifications.... 25-4 GROUP 30 - POWER FRONT-WHEEL DRIVE General Information................... 30-1 Diagnosing Malfunction... 30-8 Testing... 30-9 Removal... 30-9 Inspection and Repair... 30-10 Assembly... 30-16 Control Valve... ' 30-19 Adjustments... 30-20 Specifications... 30-21 Group 5 CLUTCHES FOR SYNCRO.. RANGE TRANSMISSION AND PTO GENERAL INFORMATION DIAGNOSING CLUTCH MALFUNCTIONS The transmission and PTO clutch assemblies consist of two spring-loaded dry-disk clutches mounted in tandem. The front clutch supplies engine power to the transmission and the rear clutch supplies engine power to the PTO. The clutches operate independently of each other. The transmission clutch is manually controlled by a pedal, and the PTO clutch is controlled by oil pressure from the main hydraulic system. Clutch Slips Worn, glazed or burned clutch facings. Oil or grease on clutch facings. Insufficient or zero transmission clutch pedal free travel. Release levers out of adjustment. Operator riding clutch pedal. Insufficient pressure on PTO clutch. Clutch facing replaced with wrong material.
50 Power Train 30-16 Power Front-Wheel Drive Tractors - 4320 TM-1029 (Dec-74) Pivot Pin Assembly ASSEMBLY Place wheel motor housing into place in axle knee. Position two thrust washers with tabs on top and bottom between axle knee and motor housing (Fig. 23). Outer thrust washer tab should be away from center of wheel and inner should be toward center of wheel. Install pivot pin into axle knee with holes in pivot pin lining up with holes in axle knee. Install cap with pressure oil tube into pivot pin and tighten cap screws to 35 ft-ibs torque. Install bleed oil tube into cap and tighten securely. Next, bolt two pieces of strap iron, approximately six inches long, to the front of the motor housing (Fig. 24). Place a washer under each end of the straps, being sure the washers contact only the edge of the bearing and not the motor housing. Tighten both strap bolts only until the washers are lightly held in place. Move the weight to the 2 o'clock position and release. Tighten one cap screw slightly. Move the weight back to the 2 o'clock position and release. Tighten cap screw slightly again. Repeat these two steps until the weight fails to turn the wheel hub. Mark the cap screw and back off 112 turn. Repeat the same steps for the other cap screw. When the weight is held in a fixed position by the second cap screw, retighten the marked (first) cap screw the same amount it was backed off. Fig. 24-Measuring for Shim Requirement Adjust bearings before installing seal. Install inner bearing, front wheel hub and outer bearing. Bolt a three-pound weight at about 2 o'clock on the outside edge of the front wheel hub (Fig. 24). Use one of the cap screw holes to attach the weight. The weight will cause the hub to rotate until the weight comes to rest at the 6 o'clock position. Fig. 25-Positioning Straightedge Now lay a straightedge across the motor housing and outside bearing and use a feeler gauge to measure between the straightedge and outside bearing to determine the preload or end play (Fig. 25).
TM-1029 (Dec-74). Hydraulic System 70 General Information, Diagnosis, and Tests 5-1 Section 70 HYDRAULIC SYSTEM GROUP 5 - GENERAL INFORMATION, DIAGNOSIS AND TESTS General Information... 5-3 General Hydraulic System Testing... 5-3 Leakage Check... 5-3 Time Cycle Check... 5-4 Hydraulic Tests Transmission Pump... 5-4 Main Hydraulic Pump... 5-4 Rockshaft... 5-5 Selective Control Valve... 5-6 Pressure Tests... 5-6 Diagnosis Malfunctions... 5-7 Specifications... 5-7 GROUP 10 - MAIN RESERVOIR, VALVES, OIL COOLER, AND OIL RESERVOIR Reservoir and Filters..................... 10-1 Hydraulic Oil Relief and Check Valves Operation... 10-1 Removal and Repair................... 10-2 Pressure Control Valve................... 10-2 Oil Cooler............................... 1 0-4 Oil Reservoir (Tank)... 10-4 Specifications............................ 10-5 GROUP 15 - HYDRAULIC PUMPS Transmission Pump... 15-1 Main Hydraulic Pump General Information... 15-2 Diagnosing Malfunctions................ 15-2 Operation.............................. 15-3 Removal... 15-4 Inspection and Repair.................. 15-4 Assembly.............................. 15-5 Adjustment............................ 15-7 Specifications............................ 15-8 GROUP 20 - POWER STEERING General Information... 20-1 Operation................................ 20-2 Diagnosis and Tests... 20-4 Steering Valve... 20-8 Steering Motor.......................... 20-12 Specifications........................... 20-14 GROUP 25 - POWER BRAKES General Information and Operation... 25-1 Cylinder, Plates and Disks... 25-3 Brake Valve... 25-3 Brake Accumulator....................... 25-6 Bleeding Brakes... 25-7 Pedal Adjustment... 25-7 Specifications............................ 25-8 GROUP 30 - ROCKS HAFT AND IMPLEMENT HITCHES General Information... 30-1 Operation................................ 30-2 Diagnosing Malfunctions... 30-4 Rockshaft Housing Assembly.............. 30-5 Rockshaft Valve Assembly................ 30-7 Load Control Arm and Shaft............. 30-10 Rockshaft Control Linkage............... 30-11 3-Point /:iitch and Quik-Coupler.......... 30-14 Power Weight Transfer Hitch............. 30-16 Specifications........................... 30-19 GROUP 35 - SELECTIVE CONTROL VALVE, BREAKAWAY COUPLER AND REMOTE CYLINDER General Information... 35-1 Operation................................ 35-2 Diagnosis................................ 35-4 Testing.................................. 35-4 Removal................................. 35-5 Inspection and Repair.................... 35-6 Assembly... 35-7 Adjustment..., 35-8 Remote Cylinder........................ 35-11 Specifications........................... 35-13
TM-1029 (Aug-70) Miscellaneous 80 Conventional Front Axle 5-1 Section 80 MISCELLANEOUS GROUP 5 - CONVENTIONAL FRONT AXLE General Information... 5-2 Removal... 5-2 Repair... 5-2 Installation... 5-2 Specifications... 5-3 Torques for Hardware... 5-3 Special Tool... 5-3 GROUP 10 - POWER FRONT-WHEEL DRIVE AXLE General Information.................... 10-1 Removal... 10-1 Repair............................... 10-2 Installation... 10-2 Specifications......................... 10-2 Torques for Hardware................... 10-2 Special Tool... 10-2 Group 5 CONVENTIONAL FRONT AXLE 14 ~13 R 17071 ~~ I i 15~ 14 g 1-Cap Screw 2-Cap Screw 3-Axle Pivot Bracket 4-Grease Fitting 5-Pivot Pin 6-Bushing 7-Front Axle B-Special Washer 9-Knuckle Dust Excluder 10-Knuckle 11-Spring Pin 12- Thrust Washer 13-Dowel Pin 14-Pivot Pin Clamp 15-Cap Screw and Washer Fig. 1-Exploded View of Front Axle Assembly (Fixed Tread)