John Deere 8120T 8220T 8320T 8420T 8520T Operation and Test Technical Manual [Tractors]

Factory Operation and Test Technical Manual TM1981 For John Deere 8120T, 8220T, 8320T, 8420T, 8520T Track Tractors. Detailed step by step illustrations, instructions, diagrams for Systems Diagnosis, System Theory of Operation, Performance Testing, Tests and Adjustments, Operational Check, Operation, Unit Locations and Identification, Diagnostic Codes, Schematics and lot of other useful information. Includes electrical wiring diagrams.

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Models

John Deere
8120T
8220T
8320T
8420T
8520T

Contents

GENERAL
—Safety
—General References
SERVICE CODES
ACU—ACU Code Diagnostics
AMS—AMS General Diagnostic Codes
ATC—ATC Code Diagnostics (—)
CCU—CCU Code Diagnostics
ECU—ECU Code Diagnostics
HCU—HCU Code Diagnostics
ICU—ICU Code Diagnostics
JDL—JdL Code Diagnostics
PCU—PCU Code Diagnostics
SCU—SCU Code Diagnostics
SCO—SCO Code Diagnostics
SSU—SSU Code Diagnostics
SUP—SUP Code Diagnostics
OBSERVABLE SYMPTOMS
—Electrical
—Ag Management Solutions (AMS)
—Hitch
—Heating, Ventilation and Air Conditioning(Standard)
—Heating, Ventilation and Air ConditioningCLIMATRAK™ (ATC) (—)
—Operator Station
—Power TakeOff (PTO)
—Selective Control Valves (SCV)
—Steering
—Transmission
—Hydraulics
SYSTEM DIAGNOSIS
—Electrical
—Transmission System
—Steering and Brakes System
—Hydraulic System
—CLIMATRAK™ (ATC) System (—)
—Heated Seat
ENGINE
—Operational Checks
—Tests and Adjustments
—Theory of Operation
—Schematics and Diagrams
FUEL AND AIR
—Theory of Operation
ELECTRICAL
—Tests and Adjustments
—Theory of Operation
—Schematics and Diagrams
CONTROL UNITS
—Codes and Addresses
ACU—ACU References
ATC—CLIMATRAK™ (ATC) References
CCU—CCU References
ECU—ECU References
HCU—HCU References
ICU—ICU References
IMS—Implement Management System (IMS) References
PCU—PCU References
SCU—SCU References
SCO—SCo References
SSU—SSU References
SUP—SUP References
Section A—AG MANAGEMENT
SOLUTIONS (AMS) — GREENSTAR™
GSS—GREENSTAR™ System References
Section B—AG MANAGEMENT
SOLUTIONS (AMS)—JDLINK™
A—Accessing Diagnostic Addresses and Codes
B—Diagnostic Trouble Codes
C—Diagnostic Addresses
A—JDLINK™ Machine Messenger Diagnostics
Section C—AG MANAGEMENT
SOLUTIONS (AMS) — AUTOTRAC
A—How to Use This Diagnostic Information
A—Accessing Diagnostic Addresses and Codes
B—Diagnostic Trouble Codes
C—Diagnostic Addresses
A—AutoTrac Identification
B—AutoTrac Diagnostics Series Factory Installed
C—AutoTrac Diagnostics Series Field Installed
D—GREENSTAR™ Parallel Tracking Identification
E—Parallel Tracking Diagnostics Series Factory Installed
F—Parallel Tracking Diagnostics Series Field Installed
G—GREENSTAR™ Display Diagnostics
H—GREENSTAR™ Mobile Processor Diagnostics
I—STARFIRE™ Receiver Diagnostics
J—GREENSTAR™ KeyCard Diagnostics
K—AutoTrac CAN Bus Identification
L—AutoTrac CAN Bus Diagnostics Series Factory Installed
M—AutoTrac CAN Bus Diagnostics Field Installed
N—AutoTrac CCD Bus Identification
O—AutoTrac CCD Bus Diagnostics Series Factory Installed
P—AutoTrac CCD Bus Diagnostics Series Field Installed
Q—AutoTrac Power Identification
R—AutoTrac Power Diagnostics Series Factory Installed
S—AutoTrac Power Diagnostics Series Field Installed
T—AutoTrac Status Identification
U—AutoTrac Status Diagnostics Series Factory Installed
V—AutoTrac Status Diagnostics Series Field Installed
W—AutoTrac Steering Response Identification
X—AutoTrac Steering Response Diag Series Factory Installed
Y—AutoTrac Steering Response Diag Series Field Installed
Z—AutoTrac Steering Control Unit Identification
AA—AutoTrac Steering Control Unit Diag Series Factory Installed
AB—AutoTrac Steering Control Unit Diag Series Field Installed
A—Circuit Code Listing
B—Connector Information
Section D—AG MANAGEMENT SOLUTIONS (AMS)FIELD DOC
A—GPS Position and STARFIRE Receiver Operation and Tests
B—FIELD DOC Basic Operation and Tests
POWERSHIFT TRANSMISSION
—Operational Checks
—Tests and Adjustments
—Theory of Operation
—Schematics and Diagrams
DRIVE SYSTEMS
—Tests And Adjustments
—Theory of Operation
STEERING AND BRAKES
—Preliminary Checks
—Operational Checks
—Tests and Adjustments
—Theory of Operation
—Schematics and Diagrams
HYDRAULICS
—Operational Checks
—Tests and Adjustments
—Theory of Operation
—Schematics and Diagrams
OPERATOR STATION
—Preliminary Checks
—Operational Checks
—Tests And Adjustments
—Theory Of Operation
—Schematics and Diagrams
TOOLS
—Fabricated Tools
—Test Kits