John Deere 8120, 8220, 8320, 8420 and 8520 Tractors Repair Manual (TM1970)

Illustrated factory Repair Manual for John Deere Tractors Models 8120, 8220, 8320, 8420 and 8520.

This manual will assist you in assembling, disassembling, and repairing for your tractor.
You can use a Windows, Mac, or Android device to view this manual. You only need to have a PDF reader installed.

Covered Models:
   8120
   8220
   8320
   8420
   8520

Format: PDF, 853 pages
Language: English
Publication Date: 06 Apr 2022
Table of Contents:
   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
   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