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

Factory Operation and Test Technical Manual TM1980 For John Deer 8120, 8220, 8320, 8420, 8520 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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pages 3130
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Models

John Deere
8120
8220
8320
8420
8520

Contents

GENERAL
—Safety
—General References
SERVICE CODES
ACU—ACU Code Diagnostics
AMS—AMS General Diagnostic Codes
ASU—ASU Code Diagnostics
ATC—ATC Code Diagnostics
CCU—CCU Code Diagnostics
ECU—ECU Code Diagnostics
EHo—EHo 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
—Axles
—Electrical
—Ag Management Solutions (AMS)
—Hitch
—Heating, Ventilation and Air Conditioning (Standard)
—Heating, Ventilation and Air Conditioning CLIMATRAK™ (ATC)
—Operator Station
—Power TakeOff
—Selective Control Valve
—Steering
—Transmission
—Hydraulics
SYSTEM DIAGNOSIS
—Electrical
—Transmission
—Drive Systems
—Steering and Brake Systems
—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
—Service Codes
ACU—ACU References
ASU—ASU References
ATC—CLIMATRAK™ (ATC) References
CCU—CCU References
ECU—ECU References
EHo—EHo 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
AG MANAGEMENT SOLUTIONS (AMS) — GREENSTAR
GSS—GREENSTAR™ System References
AG MANAGEMENT SOLUTIONS (AMS)—JDLINK
A—Accessing Diagnostic Addresses and Codes
B—Diagnostic Trouble Codes
C—Diagnostic Addresses
A—JDLINK™ Machine Messenger Diagnostics
AG MANAGEMENT SOLUTIONS (AMS) — AUTOTRAC
A—How to Use This Diagnostic Information
A—Accessing Diagnostic Addresses and Codes
B—Diagnostic Trouble Codes
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 Series 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
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
—Schematics and Diagrams
STEERING AND BRAKES
—Preliminary Checks
—Operational Checks
—Tests And Adjustments
—Theory of Operation
—Schematics and Diagrams
HYDRAULIC SYSTEM
—Preliminary Checks
—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