Description
John Deere 8120 8220 8320 8420 8520 Tractors Technical Manual TM1970 is the complete factory repair and service manual for John Deere 8120, 8220, 8320, 8420 and 8520 tractors. This comprehensive workshop manual contains detailed repair procedures, maintenance instructions, specifications, troubleshooting information and overhaul procedures used by John Deere dealer technicians.
Containing 1012 pages of professional workshop information, this manual covers all major tractor systems including engine, fuel systems, electrical systems, Power Shift transmissions, MFWD axles, Independent Link Suspension axles, hydraulics, steering, brakes, PTO systems and operator station components.
Whether performing routine maintenance, troubleshooting faults or carrying out major repairs, this manual provides the technical information required to service and repair these tractors to factory standards.
WHAT THIS MANUAL CONTAINS
• Safety information and procedures
• General information
• Engine component removal and installation
• Engine repair procedures
• Diesel fuel system servicing
• Air intake system repairs
• Engine cooling system maintenance
• Coolers and air conditioning condenser systems
• Electrical connectors
• Wiring harness routing diagrams
• Charging circuits
• Starting circuits
• Relays, fuses, solenoids and switches
• Monitoring systems and sensors
• Armrest control systems
• Implement and accessory connectors
• Electrical component repairs
• Power Shift transmission repairs
• Transmission removal and installation
• Transmission servicing and overhaul
• Drive system repairs
• Rear differential and input quill servicing
• Final drive repairs
• Rear PTO servicing
• Hydraulic pump drive systems
• MFWD clutch repairs
• MFWD axle servicing
• Final drive repairs for MFWD axles
• Differential servicing
• Input gear train repairs
• Oscillation system repairs
• Secondary brake servicing
• Independent Link Suspension axle repairs
• Drive shaft servicing
• Steering system repairs
• Suspension system maintenance
• Steering column repairs
• Steering control assemblies
• Steering cylinder servicing
• Brake valve repairs
• Brake component servicing
• Trailer brake systems
• Hydraulic component removal and installation
• Hydraulic system repair and cleanup
• Tandem hydraulic pump systems
• Secondary hydraulic pumps
• Filter bypass systems
• Hitch valves and selective control valves
• Couplers and hydraulic connections
• Hitch servicing
• Hood repairs
• Front axle servicing
• Wagon and pick-up hitch repairs
• Operator station repairs
• Heating, ventilation and air conditioning systems
• Air conditioning system servicing
• Air suspension seat repairs
• ACTIVE SEAT™ servicing
• Armrest repairs
• Cab door and windshield servicing
• Dealer fabricated tools
MANUAL DETAILS
Manual Type: Technical Manual
Manual Number: TM1970
Models Covered: John Deere 8120, 8220, 8320, 8420 and 8520 Tractors
Publication Date: July 2010
Page Count: 1012 Pages
Format: PDF Digital Download
Language: English
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A USB memory stick containing the manual in PDF format. Read the PDF on a compatible device with a USB connection and PDF reader. No printed manual is included.
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Our reference / SKU: 65JD