John Deere 770G 770GP 772G and 772GP Motor Grader (SN. 634380—656507) Diagnostic Operation and Test Manual TM12139 26SEP23

For complete service information also see:
770G, 770GP, 772G, and 772GP Motor Grader (SN 634380-) Repair TM12141
JDLink (MTG) Technical Manual TM114519
TeamMate II 1200, 1400,and 1600 Series Inboard Planetary Axles CTM43
Super Caddy Oil Cleanup Procedure CTM310
DF180 Series Powershift Transmission Repair Manual CTM308
TeamMate II 1400 Series Inboard Planetary Axles CTM138619
120 Series Hydraulic Cylinders CTM120519
120 Series Hydraulic Cylinders CTM114319
6090 PowerTech Diesel Engine (Interim Tier 4) Level 21 ECU CTM104819
JDLINK/ZXLINK Machine Monitoring System CTM10006

FOREWORD
MANUAL IDENTIFICATION—READ THIS FIRST!
Section 9000 – GENERAL INFORMATION
Group 01 – Safety
Section 9001 – DIAGNOSTICS
Group 10 – PCU Diagnostic Trouble Codes
Group 20 – ECU Diagnostic Trouble Codes
Group 30 – ADU Diagnostic Trouble Codes
Group 40 – FLC Diagnostic Trouble Codes
Group 50 – HVC Diagnostic Trouble Codes
Group 60 – AVC Diagnostic Trouble Codes
Group 70 – OC3 Diagnostic Trouble Codes
Group 80 – HWD Diagnostic Trouble Codes
Group 90 – LJ1 Diagnostic Trouble Codes
Group 100 – LJ2 Diagnostic Trouble Codes
Group 110 – LJ3 Diagnostic Trouble Codes
Group 120 – LJ4 Diagnostic Trouble Codes
Group 130 – RJ1 Diagnostic Trouble Codes
Group 140 – RJ2 Diagnostic Trouble Codes
Group 150 – RJ3 Diagnostic Trouble Codes
Group 160 – RJ4 Diagnostic Trouble Codes
Section 9005 – OPERATIONAL CHECKOUT PROCEDURE
Group 10 – Operational Checkout Procedure
Section 9010 – ENGINE
Group 05 – Theory of Operation
Group 15 – Diagnostic Information
Group 20 – Adjustments
Group 25 – Tests
Section 9015 – ELECTRICAL SYSTEM
Group 05 – System Information
Group 10 – System Diagrams
Group 15 – Sub-System Diagnostics
Group 16 – Monitor Operation
Group 20 – References
Section 9016 – SIX WHEEL DRIVE (6WD)
Group 05 – Theory of Operation
Group 15 – Diagnostic Information
Group 20 – Adjustments
Group 25 – Tests
Section 9020 – POWER TRAIN
Group 05 – Theory of Operation
Group 15 – Diagnostic Information
Group 25 – Tests
Section 9025 – HYDRAULIC SYSTEM
Group 05 – Theory of Operation
Group 15 – Diagnostic Information
Group 25 – Tests
Section 9031 – HEATING AND AIR CONDITIONING
Group 05 – Theory of Operation
Group 15 – Diagnostic Information
Group 25 – Tests