John Deere 8420 & 8520 Tractors Service Repair Manual

John Deere 8420 & 8520 Tractors Service Repair Manual

John Deere 8120, 8220, 8320, 8420, 8520 Worldwide Edition Tractors (tm1970) Complete.

Illustrated Factory Service Repair Manual for John Deere 2WD or MFWD Tractors 8120, 8220, 8320, 8420 & 8520.

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This manual carries high high-quality images, instructions that will help you to troubleshoot, and restore your truck. This file is printable, without restrictions, consists of searchable text, bookmarks, crosslinks for smooth navigation.

Covered models:

8120

8220

8320

8420

8520

Contents:

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

INDEPENDENT LINK SUSPENSION Axle

Component Removal and Installation

Controls

Final Drives

Drive Shafts

Brakes

Differential

Steering

Suspension

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.