John Deere 8120T 8220T 8320T 8420T 8520T Tracked Tractors Repair Manual TM1971

The John Deere 8120T 8220T 8320T 8420T 8520T Tracked Tractors Repair Manual provides detailed repair information for the 8120T, 8220T, 8320T, 8420T, and 8520T tracked tractor models. It covers general information, engine repair, fuel and cooling systems, electrical systems, transmission, drive systems, steering and brakes, hydraulics, operator station, track frame and components, and dealer fabricated tools. The manual includes component removal and installation procedures, engine repair, diesel fuel and air intake systems, cooling components, electrical circuits and wiring harnesses, transmission repair, rear axle and final drive components, PTO, steering and brake components, hydraulic systems, hitch and selective control valves, HVAC, cab components, tracks, tension cylinder and accumulator, and track frame service.

Specifications: SM

Brand: John Deere 8000-9000 Series Tractors
Type of Document: Repair Manual
Type of Equipment: Tracked Tractor
Model: 8120T, 8220T, 8320T, 8420T, 8520T
Manual Number: TM1971
Language: English
Format: PDF

Details:

Introduction

Foreword
Dealer Predelivery Information Form

General Information

Safety
General Information

Engine

Component Removal and Installation
Engine Repair

Fuel and Cooling Systems

Diesel Fuel System
Air Intake System
Engine Cooling System
Coolers and Air Conditioning Condenser

Electrical

Connectors
Wiring Harness Routings
Charging Circuit
Starting Circuit
Relays, Fuses, Solenoids, and Switches
Monitoring Systems and Sensors
Armrest Control
Implement and Accessory Connectors
Convenience and Accessory Components

Transmission

Component Removal and Installation
In-Tractor Repair
Transmission

Drive Systems

Component Removal and Installation
Rear Axle Assembly
Outboard Planetary Final Drive
PTO
Steering Gears
Mid-Frame Drive Shafts

Steering and Brakes

Component Removal and Installation
Steering Column
Steering Wheel Position Input Assembly
Steering Pump
Steering Motor
Brake Valve
Brake Components

Hydraulics

Component Removal and Installation
Hydraulic System Repair and Cleanup
Tandem Hydraulic Pump (Transmission Control-Charge)
Secondary Hydraulic Pump (Hitch-SCV)
Hydraulic Filter Bypass
Hitch Valve, Selective Control Valves, and Couplers
Hitch

Miscellaneous

Hood

Operator Station

Component Removal and Installation
Heating, Ventilating, and Air Conditioning (HVAC)
Air Conditioning System
Air Suspension Seat
Armrest
Cab Door and Windshield

Track Frame and Components

Tracks
Tension Cylinder and Accumulator
Track Frame

Dealer Fabricated Tools

Fabricated Tools

John Deere 8120T 8220T 8320T 8420T 8520T Tracked Tractors Repair Manual TM1971