Part of the John Deere Repair Manuals.
Your 4020 has been out of production for decades, but this 378-page John Deere 4000, 4020 Technical Manual PDF (OEM TM1006) still holds every factory procedure for both tractors. Inside: exploded views of the Syncro-Range and Power Shift transmissions, a full troubleshooting section covering diesel, gasoline, and LP-gas fuel systems, and step-by-step teardown procedures from cylinder head to Hi-Crop final drive. You also get tune-up specs, calibration data, and test values for the charging circuit, starting circuit, power steering, and rockshaft hitch. Set differential drive shaft bearing preload at 0.004 to 0.006 inch, then confirm 17 to 27 lbs-inch of drag torque before buttoning it up. Forum threads won't rebuild your Power Shift. This bookmarked PDF opens on any laptop, tablet, or phone; download it and take the whole factory library out to the tractor.
Other edition of this manual
What's Inside This John Deere 4000, 4020 Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 5-13 | Predelivery, Delivery, And After-Sale Services, Tune-Up and Adjustment, Lubrication, Separation |
| Engine | 14-38 | General Information and Diagnosis, Cylinder Head, Valves, And Camshaft, Cylinder Block, Liners, Pistons, And Rods |
| Fuel Systems | 39-65 | Diesel Fuel System, Lubrication System, Cooling System, Governor and Speed Control Linkage, LP-Gas Fuel System |
| Electrical System | 66-125 | Information and Diagrams, Motorola Charging Circuit, Delcotron Charging Circuit, Delco-Remy Starting Circuit, John Deere Starting Circuit, Ignition System |
| Power Train | 126-238 | Clutches for Syncro-Range Transmission and PTO, Syncro-Range Transmission, Engine Disconnect Clutch, Power Shift Transmission, Differential, Final Drive, Hi-Crop Final Drive |
| Steering and Brakes | 239-240 | Power Steering, Power Brakes, Steering Valve, Steering Cylinder, Steering Motor, Brake Valve Assembly |
| Hydraulic System | 241-345 | General Information, Diagnosis, And Testing, Main Reservoir, Filter, Valves, Oil Cooler, And Oil Reservoir |
| Miscellaneous | 346-378 | Conventional Front Axle, Power Front Wheel Drive Axle |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Differential drive shaft bearing preload | 0.004-0.006 in. | p. 244 |
| Differential drive shaft bearing drag torque | 17-27 lb-in. | p. 244 |
| Clutch oil manifold hollow dowel I.D. | 1.6225-1.6235 in. | p. 248 |
| Clutch drive shaft bushing I.D. | 0.8765-0.8795 in. | p. 248 |
| Hydraulic system pressure buildup | 2700 psi | p. 274 |
| Valve housing surface flatness limit | Less than 50 millionths of an inch | p. 274 |
