Part of the John Deere Repair Manuals.
All 358 pages of this John Deere 3020 Tractor Technical Manual (OEM TM-1005) cover one job: restoring your 3020 to factory condition across engine, fuel systems, electrical, power train, hydraulics, and front axle. Inside: wiring diagrams for the charging, starting, ignition, and lighting circuits; hydraulic schematics tracing the full fluid path through the Rockshaft and selective control valves; a troubleshooting section spanning diesel, gasoline, and LP-gas fuel malfunctions; and torque tables paired with lubrication and maintenance interval charts. You also get page after page of exploded views covering every sub-assembly from the Syncro-Range transmission to the Hi-Crop final drive. Clutch cover-to-flywheel cap screws torque to 35 ft-lbs; confirm the Syncro-Range pump hits at least 7.5 gpm at 1900 rpm before signing off on a transmission service. Your 3020 is down. Bookmarked and keyword-searchable, this PDF opens on any device. Bring it to the shop and get the factory answer on the first try.
What's Inside This John Deere 3020 Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 5-34 | Specifications, Predelivery, Delivery, And After-Sale Services (Predelivery Service, Delivery Service, After-Sale Inspection) |
| Engine | 35-80 | General Information, Cylinder Head, Cylinder Block, Crankshaft, Lubrication System, Cooling System, Governor |
| Fuel System | 81-116 | Diagnosing Malfunctions, Diesel Fuel System, Gasoline Fuel System, LP-Gas Fuel System, Carburetor |
| Electrical System | 117-176 | Information and Diagrams, Charging Circuit, Starting Circuit, Ignition System, Lighting and Accessory Circuits |
| Power Train | 177-268 | Syncro-Range Transmission and PTO Clutches, Syncro-Range Transmission, Engine Disconnect Clutch, Power Shift Transmission, Differential, Final Drive, Hi-Crop Final Drive |
| Steering and Brakes | 269-270 | General Information, Hydraulic System Reference |
| Hydraulic System | 271-352 | General Information, Main Reservoir, Hydraulic Pumps, Power Steering, Power Brakes, Rockshaft, Selective Control Valve |
| Miscellaneous | 353-358 | Conventional Front Axle, Power Front Wheel Drive Axle |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Marvel-Schebler Carburetor—Model USX-49SL Idle adjusting needle | Approx. 1-1/2 turns open | p. 112 |
| Clutch cover-to-flywheel cap screws torque | 35 ft-lbs | p. 186 |
| Spark plugs torque | 35 ft-lbs | p. 170 |
| Transmission pump - minimum output (Syncro-Range) | 7.5 gpm at 1900 rpm | p. 277 |
| Oil pressure at 1900 rpm | 25 - 40 psi | p. 68 |
| Maximum acceptable leakage - system | 150cc per minute | p. 277 |
| PTO Horsepower (Diesel) | 71.26 hp | p. 5 |
| Engine Displacement (Diesel) | 270 cu. in. | p. 5 |
| Compression Ratio (Diesel) | 16.5 to 1 | p. 5 |
| Fuel Tank Capacity (Diesel/Gasoline) | 29 U.S. gals | p. 6 |
| Hydraulic System Standby Pressure | 2250 psi | p. 7 |
| Engine Oil Pressure at 1900 rpm | 25 - 40 psi | p. 68 |
