John Deere 9420, 9520, 9620 Tractors Repair Technical Manual

Table of Contents

SECTION 210—GENERAL
Group 05—Safety
Group 10—General Specifications
Group 15—General References
SECTION 211—SERVICE CODES
Group ACU—ACU Code Diagnostics
Group AMS—AMS Code Diagnostics
Group ASU—ASU Code Diagnostics
Group ATC—ATC Code Diagnostics
Group CCU—CCU Code Diagnostics
Group ECU—ECU Code Diagnostics
Group HCU—HCU Code Diagnostics
Group ICU—ICU Code Diagnostics
Group JDL—JDL Code Diagnostics
Group PCU—PCU Code Diagnostics
Group SCo—SCo Code Diagnostics
Group SCU—SCU Code Diagnostics
Group SSU—SSU Code Diagnostics
Group SUP—SUP Code Diagnostics
SECTION 212—OBSERVABLE SYMPTOMS
Group 05—Axles
Group 15—Electrical
Group 16—Ag Management Solutions (AMS)
Group 20—Hitch
Group 25—Heating, Ventilation, and Air
Conditioning (Standard)
Group 26A—Heating, Ventilation and Air
Conditioning – CLIMATRAKä (ATC) (—009999)
Group 26B—Heating, Ventilation and Air
Conditioning – CLIMATRAKä (ATC) (010001—)
Group 30—Operator Station
Group 40—Power Take-Off
Group 45—Selective Control Valve
Group 50—Steering
Group 60—Manual Shift Transmission
SECTION 213—SYSTEM DIAGNOSIS
Group 50—Powershift Transmission
Group 55—Manual Shift Transmission
Group 60—Steering System
Group 61—AutoTrac Steering System
Group 70A—Hydraulic System (Standard)
Group 70B—Hydraulic System (Scraper High Flow)
Group 70C—Hydraulic System (Ag High Flow)
Group 90—ATC System (010001—)
SECTION 220—ENGINE
Group 10—Operational Checks
Group 15—Tests and Adjustments
Group 20—Theory of Operation
SECTION 230—FUEL AND AIR
Group 20—Theory of Operation
SECTION 240—ELECTRICAL
Group 15—Tests and Adjustments
Group 20—Theory of Operation
Group 25—Schematics and Diagrams
SECTION 245—CONTROL UNITS
Group 05—Codes and Addresses
Group ACU—ACU References
Group ASU—ASU References
Group ATC—ATC References
Group CCU—CCU References
Group ECU—ECU References
Group HCU—HCU References
Group ICU—ICU References
Group PCU—PCU References
Group PRF—PrF References
Group SCo—SCo References
Group SCU—SCU References
Group SSU—SSU References
Group SUP—SUP References
SECTION 246A—AG MANAGEMENT SOLUTIONS (AMS) — GREENSTAR
Group GSS—Greenstarä System References
SECTION 246B—AG MANAGEMENT SOLUTIONS (AMS) — JDLINK
Group 10A—Accessing Diagnostic Codes and Addresses
Group 10B—Diagnostic Trouble Codes

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.

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

Using the tractors manual as a guide will reduce error and costly delay. It will also assure you the best in finished service work.