John Deere 7720, 7820 and 7920 Tractors Technical Service Repair Manual (TM2080)

What's Covered in This Manual

This is the Technical/Repair manual (TM2080) for the John Deere 7720, 7820 and 7920 tractors, and like the 6000-series Europe manual in this batch, it has to account for more than one transmission design: these tractors could be ordered with the PowrQuad-Plus transmission or the AutoPowr/IVT (infinitely variable transmission), and the manual gives each its own complete section - range box and shifting mechanisms for PowrQuad-Plus, hydrostatic module and front pump/control valve assembly for AutoPowr/IVT - rather than assuming one or the other.

Drive systems get similar separate treatment: there's a dedicated MFWD Drive Systems section (controls, clutch, axle, and a suspended MFWD axle option) alongside a general Drive Systems section covering the rear differential, final drive, front and rear PTO, and primary brakes - useful because not every 7720/7820/7920 left the factory with mechanical front-wheel drive.

The rest of the manual covers what you'd expect from a full repair manual at this level: engine removal and repair, fuel/air intake/cooling with both standard and deluxe air conditioning condenser options, the electrical system down to monitoring and auxiliary lighting, steering and brakes, hydraulics (including separate front and rear 3-point hitch groups and a bleed procedure for the hydraulic system), and the operator's station with HVAC and the air suspension seat. At 1,100 pages, it's a complete repair reference for three tractor sizes and two very different transmission technologies under one cover.

Table of Contents

• Section 10 - General Information - safety, general information, specifications
• Section 20 - Engine - component removal and installation, engine repair
• Section 30 - Fuel/Air Intake and Cooling Systems - fuel system, air intake, cooling, standard/deluxe AC condenser, exhaust
• Section 40 - Electrical - connectors, wiring harnesses, charging/starting circuits, monitoring system
• Section 50 - PowrQuad-Plus Transmission - shifting mechanisms, module, range box
• Section 51 - AutoPowr/IVT Transmission - controls, front pump/control valve, hydrostatic module
• Section 56 - MFWD Drive Systems - controls, clutch, axle, suspended MFWD axle components
• Section 57 - Drive Systems - rear differential, final drive, front/rear PTO, primary brakes
• Section 60 - Steering and Brakes - steering column, hydrostatic steering, service and trailer brakes
• Section 70 - Hydraulics - hydraulic pump, valves, front/rear 3-point hitch, bleed procedure
• Section 80 - Miscellaneous - hood, front axle, steering cylinders, rear wheels, wagon/pick-up hitch
• Section 90 - Operator Station - HVAC, air conditioning, air suspension seat