Part of the John Deere Repair Manuals.
This is the complete John Deere factory repair manual for the 6020 to 6620 tractor series, including 6020 SE through 6420 SE variants. Across 1,948 pages it documents engine removal and rebuild for both the 4.5-liter PowerTech 4-cylinder (6020 to 6320) and the 6.8-liter PowerTech 6-cylinder (6420 to 6620), four transmission families, the full hydraulic system with axial piston and gear pumps, steering and brakes, and the complete electrical system with wiring diagrams and torque specifications. It is the same information a John Deere dealer technician works from, with torque values, capacities and test pressures called out so a repair is done to spec the first time.
What's Inside This Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | Specifications, Engine Tune-Up, Capacities, Lubrication, Torque Values, Product Identification, Serial Number Locations, Predelivery Inspection | |
| Engine | Engine Removal and Installation, Crankshaft, Cylinder Head, Pistons and Connecting Rods, Camshaft, Oil Pump, Flywheel | |
| Fuel, Air Intake, Cooling and Exhaust Systems | Speed Control Linkage, Lucas Fuel Injection Pump, Bosch VP44 Injection Pump, Air Intake, Turbocharger, Cooling System, Thermostat, Water Pump, Exhaust | |
| Electrical System | Battery, Alternator, Starter Motor, Wiring Harness, Instrument Panel, Gauges, ECU Sensors, Lighting | |
| SynchroPlus Transmission | Transmission Removal and Installation, Gears, Synchronizers, Shift Linkage | |
| Power Reverser Transmission | Power Reverser Clutch, forward/reverse Control, Transmission Repair | |
| AutoPowr/IVT Transmission | Infinitely Variable Transmission, Hydrostatic Units, Electronic Control, Calibration | |
| PowrQuad, PowrQuad Plus and AutoQuad Transmissions | PowrQuad Clutch Packs, AutoQuad Ii Electrohydraulic Control, Transmission Repair and Calibration | |
| Drive Systems | Front-Wheel Drive Axle, Differential, Final Drives, Four-Wheel Drive Engagement, TLS Front Axle | |
| Steering and Brakes | Hydrostatic Steering, Steering Cylinder, Brakes, Park Lock, Handbrake | |
| Hydraulic System | Axial Piston Pump, Gear-Driven Pump, Rockshaft, Selective Control Valves, Hydraulic Cylinders, Power Beyond | |
| Miscellaneous | Rear PTO, Front PTO, Creeper Transmission, Hitch, Drawbar | |
| Operator's Cab | Cab Mounting, Air Conditioning, Heating, Operator Controls, Seat, Mirrors | |
| Special Tools | Dealer-Fabricated Special Tools, Fabrication Drawings and Dimensions |
Documents This Manual Refers To
The manufacturer cites these publications by number. We carry them:
- John Deere 4045, 4.5L, 6.8L, 6068 Diesel Engines Technical Manual (CTM104)
- John Deere 730, 750, 740, 733, 745 Front-Wheel Drive Axles Technical Manual (CTM4820)
- John Deere PowerTech 4.5L 6.8L Diesel Engines Repair Manual CTM331 [Level 12]
- John Deere 4045, 6068 Technical Manual (incl. Wiring) (CTM220)
- John Deere AS-2025, AS-2035, AS-2045, AS-2060, MS-2025, MS-2035, MS-2045 Front Wheel Drive Axles Technical Manual (CTM4687)
- John Deere 6020, 6120, 6220, 6320, 6420, 6420S, 6520, 6620, 6820, 6920 & 6920S Tractor Diagnostics Technical Manual (TM4726)
- John Deere 6020-6920S SE Tractor Operation and Tests Technical Manual (TM4741)
- John Deere 4045, 6068 Mechanical Fuel Systems Technical Manual (CTM207)
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| 6020, 6120, 6220, 6320 and SE variants | ||
| Engine (6020 to 6320) | 4.5-liter PowerTech 4-cylinder diesel | |
| 6420, 6420S, 6520, 6620 and SE variants | ||
| Engine (6420 to 6620) | 6.8-liter PowerTech 6-cylinder diesel | |
| Applicable base models per Specifications section | ||
| Fuel injection pump (standard) | Lucas fuel injection pump | |
| Applicable models per Specifications section | ||
| Fuel injection pump (alternative) | Bosch VP44 injection pump | |
| All models | ||
| Grade 5 bolt torque, 1/2 inch, lubricated | 85 N.m (63 lb-ft) | |
| Grade 8 bolt torque, 1/2 inch, lubricated | 120 N.m (88 lb-ft) | |
| Grade 5 bolt torque, 3/8 inch, lubricated | 35 N.m (26 lb-ft) | |
| Grade 8 bolt torque, 3/8 inch, lubricated | 49 N.m (36 lb-ft) | |
| 6020 to 6620 series | ||
| Production years | 2004-2009 | |
