![John Deere Model R Diesel Repair Manual [Tractor]](https://youfixthis.com/wp-content/uploads/2012/02/Manual_Download-300x300.jpg)
Part of the John Deere Repair Manuals.
This is the complete John Deere factory technical repair manual for the 7720, 7820 and 7920 Twenty Series tractors. Across 1,100 pages it covers every major system: pulling and rebuilding the 6.8L and 8.1L PowerTech diesel engines, tearing down and reassembling the PowrQuad-Plus and AutoPowr/IVT transmissions, servicing MFWD and rear final drives, tracing the full hydraulic circuit from pump to selective control valves and 3-point hitch, and diagnosing the electrical system with wiring harness routings and fault codes. It is the same manual a John Deere dealer technician works from, with the torque values and test pressures printed throughout. The download bundle additionally includes the companion PowerTech engine CTM shop manuals (CTM104, CTM385, CTM Level-14 EFI covering the 4045 and 6068 engines) and axle component technical manuals (CTM4687, CTM4820), giving you the full set of referenced service documentation in one package.
Complete the set for your 7720-7920
What's Inside This John Deere 7720-7920 Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | Safety, Identification, General Specifications | |
| Engine | Component Removal and Installation, Engine Repair (6.8L and 8.1L PowerTech) | |
| Fuel, Air Intake and Cooling | Diesel Fuel System, Air Intake System, Engine Cooling System, Coolers, Exhaust System | |
| Electrical System | Connectors, Wiring Harness Routings, Charging Circuit, Starting Circuit, Solenoids and Switches, Monitoring System, Auxiliary Lighting, Convenience and Accessory Components | |
| PowrQuad-Plus Transmission | Component Removal and Installation, Shifting Mechanisms, PowrQuad-Plus Module, Range Box | |
| AutoPowr/IVT Transmission | Component Removal, Controls, Front Pump/Control Valve Assembly, Hydrostatic Module, Shift Valve Assembly, Transmission Housings, Differential Input Assembly | |
| MFWD Drive Systems | Component Removal and Installation, Controls, MFWD Clutch, MFWD Axle, Suspended MFWD Axle Components | |
| Drive Systems | Rear Differential, Final Drive, Rear PTO, Front PTO Repairs, Primary Brakes | |
| Steering and Brakes | Steering Column, Hydrostatic Steering, Service Brakes, Trailer Brakes | |
| Hydraulic System | Component Removal and Installation, Hydraulic System Repair, Hydraulic Pump and Charge Pump, Hydraulic System Valves, Selective Control Valves and Couplers, Rear 3-Point Hitch, Front 3-Point Hitch, Bleed Hydraulic System | |
| Miscellaneous | Hood, Front Axle (Two-Wheel Drive), Steering Cylinders (Two-Wheel Drive), Rear Wheels, Wagon and Pick-Up Hitch | |
| Operator Station | Component Removal and Installation, Heating, Ventilating and Air Conditioning (HVAC), Air Conditioning System, Air Suspension Seat, Active Seat, Armrest, Cab Door and Windshield | |
| Dealer Fabricated Tools | Dfrw Special Tools List |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Rear Engine Mount | ||
| Rear Engine Mount-to-Frame Cap Screws - Torque | 125 N.m (92 lb-ft) | |
| Drive Shaft Yoke | ||
| Drive Shaft Yoke-to-Engine Cap Screws - Torque | 70 N.m (52 lb-ft) | |
| Viscous/Vistronic Fan Drive | ||
| Viscous/Vistronic Fan Drive-to-Pulley Cap Screws - Torque | 42 N.m (31 lb-ft) | |
| 8.1L PowerTech Engine | ||
| 8.1L Alternator Mount-to-Engine Cap Screws - Torque | 37 N.m (27 lb-ft) | |
| Accessory Drive Housing | ||
| Accessory Drive Housing-to-Engine - Torque | 73 N.m (54 lb-ft) | |
