John Deere 9120, 9220, 9320 Tractors Repair Technical Manual

Table of Contents

SECTION 10—General Information
Group 05—Safety
Group 10—General Information
SECTION 20—Engine
Group 00—Component Removal and Installation
Group 05—Engine Repair
SECTION 30—Fuel, Air, and Cooling Systems
Group 05—Diesel Fuel System
Group 10—Air Intake and Exhaust Systems
Group 15—Engine Cooling System
Group 20—Oil Coolers
SECTION 40—Electrical
Group 05—Connectors
Group 10—Wiring Harness Routings
Group 15—Charging Circuit
Group 20—Starting Circuit
Group 25—Relays, Fuses, Solenoids, and Switches
Group 30—Monitoring Systems and Sensors
Group 35—Armrest Control
Group 40—Implement and Accessory Connectors
Group 45—Convenience and Accessory Components
SECTION 50—18-Speed Power Shift Transmission (9020)
Group 00—Component Removal and Installation
Group 05—In Tractor Repair
Group 10—Transmission Repair
Group 15—Transmission Cleanup
SECTION 52—12-Speed Power Shift Transmission (9000)
Group 00—Component Removal and Installation
Group 05—Clutch Control
Group 10—Transmission Oil Filter Relief Valve Housing and Oil Pump
Group 15—Transmission Pressure Regulating Valve
Group 20—On-Off and Modulating Shift Solenoids
Group 25—8-Inch Clutch Assembly
Group 30—Lower 7-Inch Clutch Assembly
Group 35—Upper 7-Inch Clutch Assembly
Group 40—Compound Shaft Assembly
Group 45—9-Inch Clutch Assembly
Group 50—Front and Rear Housings
Group 55—Transmission Cleanup
SECTION 55—Mechanical Shift Transmission (MST)
Group 00—Component Removal and Installation
Group 05—Transmission Oil Filter Relief Valve Housing
Group 10—Transmission Control Valve Housing
Group 15—Transmission Pump
Group 20—Transmission Front Cover
Group 25—Hi-Lo Clutch and Brake (24-Speed)
Group 30—Hi-Lo Planetary (24-Speed)
Group 35—Spacer Housing (24-Speed)
Group 40—Traction Clutch
Group 45—Transmission Gear Drives
Group 50—Transmission Cleanup
Group 55—Shift Levers and Linkage
SECTION 56—Drive Systems
Group 00—Component Removal and Installation
Group 05—Engine Coupler
Group 10—Drive Shafts
Group 15—PTO Clutch
Group 20—PTO Clutch Valve and Linkage
Group 25—PTO Drop Box
SECTION 57—Axles
Group 00—Component Removal and Installation
Group 02—Park Brake
Group 03—Repair Preparation
Group 05—Input Housing
Group 10—Differential
Group 15—Final Drives
Group 20—Brakes
SECTION 60—Steering and Brakes
Group 05—Steering Column
Group 10—Steering Control Valve
Group 15—Steering Cylinders
Group 20—Brake Valve
Group 25—Park Brake
SECTION 70—Hydraulics
Group 00—Component Removal and Installation
Group 05—Hydraulic System Repair
Group 10—Hydraulic Pump
Group 15—Axle Lubrication and Charge Pumps
Group 20—Filter Housings and Control Valves
Group 25—Hitch Valve, Selective Control Valves, and Couplers—9000 Series
Group 30—Hitch Valve, Selective Control Valves, and Couplers—9020 Series
Group 35—High-Flow Selective Control Valve— Scraper
Group 40—Hitch
SECTION 80—Miscellaneous
Group 05—Hood and Side Panels
Group 10—Heavy-Duty Wheels—9020 Tractors
SECTION 90—Operator Station
Group 00—Component Removal and Installation
Group 05—Heating, Ventilating, and Air Conditioning (HVAC)
Group 10—Air Conditioning System
Group 15—Air Suspension Seat (S.N. —030000)
Group 20—Air Suspension Seat (S.N. 030001— ) and 9020 Series
Group 25—ACTIVE SEAT
Group 30—Armrest
Group 35—Cab Door and Windshield
SECTION 95—Hinge and Gudgeon
Group 05—Hinge
Group 10—Gudgeon
SECTION 99—Dealer Fabricated Tools
Group 05—Fabricated Tools

These are divided in two parts: repair and diagnostics. Repair sections tell how to repair the components. Diagnostic sections help you identify the majority of routine failures quickly.

This manual was planned and written for the Service Department; its place is in the shop. Use the manual whenever in doubt about correct maintenance procedures. Use it as a text book for training new Service Department personnel who are unfamiliar with John Deere Tractors.

Daily use of this manual as a guide in overcoming service problems will reduce error and costly delay to a minimum and as-sure you the best in finished service work. In many instances your customer’s confidence in your work will be improved when he sees you using the Service Manual. He knows you are following approved maintenance procedures and making proper adjustments. There is no guess-work when you use the manual.

These are concise guides for specific-machines. Technical manuals are on-the-job guides-containing only the vital information needed for-diagnosis, analysis, testing, and repair.