John Deere 8120 8220 8320 8420 8520 Tractors Repair Manual TM1970

The John Deere 8120 8220 8320 8420 8520 Tractors Repair Manual provides detailed repair information for the 8120, 8220, 8320, 8420, and 8520 tractor models. It covers general information, engine repair, fuel and cooling systems, electrical systems, Power Shift transmission, drive systems, MFWD axles, Independent Link Suspension axle, steering and brakes, hydraulics, miscellaneous components, operator station, and dealer fabricated tools. The manual includes component removal and installation procedures, engine repair, fuel and air intake systems, cooling components, electrical circuits and wiring harnesses, transmission repair, rear differential and final drives, PTO, MFWD components, suspension and steering components, brake systems, hydraulic pumps and valves, HVAC, operator station components, and related tools.

Specifications: SM

Brand: John Deere 8000-9000 Series Tractors
Type of Document: Repair Manual
Type of Equipment: Tractor
Model: 8120, 8220, 8320, 8420, 8520
Manual Number: TM1970
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

Power Shift Transmission

Component Removal and Installation
Miscellaneous Repair
Transmission

Drive Systems

Component Removal and Installation
Rear Differential and Input Quill
Final Drives
Rear PTO
Hydraulic Pump Drive
MFWD Clutch
Drivelines

MFWD Axles

Component Removal and Installation
Final Drives
Axle Housing
Differential
Input Gear Train
Oscillation
Secondary Brake

Steering and Brakes

Steering Column
Steering Control Assembly
Steering Cylinders
Brake Valve
Brake Components
Trailer Brakes

Hydraulics

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

Miscellaneous

Hood
Front Axle (Two-Wheel Drive)
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

Fabricated Tools

John Deere 8120 8220 8320 8420 8520 Tractors Repair Manual TM1970