Part of the John Deere Repair Manuals.
A rockshaft that won't lift, a collar-shift transmission that grinds going into gear: those problems don't wait for a slow week between planting and harvest. The John Deere 1020, 1120, 1630 technical manual PDF, factory publication TM4286, covers all three tractors across 368 pages. Wiring diagrams trace both the Bilux and sealed-beam lighting circuits from key switch to alternator, and hydraulic schematics map oil flow through the pump, rockshaft, and selective control valves. The power train section takes the largest share of the book: engine clutches, high-low shift unit, transmission, differential, final drives, plus independent and continuous-running PTOs. Check a suspect air cleaner against the 355 mm water head vacuum limit, then torque the start safety switch to 35 ft-lbs. Guess wrong on a shim pack and you split the tractor twice. Bookmarks and a real text layer put you two clicks from the procedure, so your weekend repair stays a weekend repair.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 5-32 | Specifications, Predelivery, Delivery and After-Sales Inspections, Lubrication and Periodic Service, Engine and Tractor Tune-Up, Tractor Separation |
| Engine | 33-92 | General Information, Diagnosing Malfunctions, Cylinder Head and Camshaft, Cylinder Block, Liners, Pistons and Connecting Rods, Crankshaft, Main Bearings and Flywheel |
| Fuel System | 93-124 | Fuel Tank, Water Trap, Transfer Pump, Fuel Filter and Air Cleaner, Roto-Diesel Fuel Injection Pump, Fuel Injection Nozzles, Cold Weather Starting Aids |
| Electrical System | 125-172 | Diagnosing Malfunctions, Bilux Lighting System, Sealed-Beam Lighting System, Starting Motor, Alternator and Regulator |
| Power Train | 173-256 | Engine Clutches and Clutch Linkage, High-Low Shift Unit, Collar-Shift Transmission, Differential, Final Drives, Independent PTO, Continuous-Running PTO |
| Front Axle, Steering System and Brakes | 257-290 | Front Axle, Steering System, Brakes |
| Hydraulic System | 291-352 | Oil Reservoir, Filter, Valves and Oil Cooler, Hydraulic Pump and Transmission Oil Pump, Rockshaft, Selective Control Valves, Remote Cylinder |
| Miscellaneous | 353-368 | Belt Pulley, Operator's Seats, Front and Rear Wheels, Roll Guard |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Standard torque for 1/4 inch UNC/UNF cap screws (Grade 6.8) | 1 mkp (7 ft.lbs.) | p. 21 |
| Standard torque for 5/16 inch UNC/UNF cap screws (Grade 6.8) | 2 mkp (14 ft.lbs.) | p. 21 |
| Vacuum gauge reading (not restricted) | 355 mm water head | p. 98 |
| Start safety switch torque | 4.8 mkp (35 ft.lbs.) | p. 132 |
| Key switch resistor | 1 ohm | p. 143 |
| Thickness of a new engine clutch disk | 9.3 to 9.9 mm | p. 189 |
| Wear tolerance for engine clutch disk | 6.3 mm | p. 189 |
| Thickness of a new PTO clutch disk | 7.7 to 8.3 mm | p. 188 |
| Wear tolerance for PTO clutch disk | 4.7 mm | p. 188 |
| Spring of by-pass valve on tractors without High-Low shift unit (Free length) | approx. 65 mm (2.56 in.) | p. 241 |
| Spring of by-pass valve on tractors with High-Low shift unit (Free length) | approx. 62 mm (2.44 in.) | p. 46 |
| I.D. of rockshaft cylinder | 82.510 to 82.590 mm (3.2485 to 3.2515 in.) | p. 341 |
