John Deere 770G 772G Motor Grader Test Manual TM14244X19 03MAY23

Section 9000 – General Information
Group 01 – Safety
Section 9001 – Diagnostics
Group 10 – Transmission Control Unit (TCU) Diagnostic
Trouble Codes
Group 20 – Engine Control Unit (ECU) Diagnostic
Trouble Codes
Group 30 – Primay Display Unit (PDU) Diagnostic
Trouble Codes
Group 40 – Vehicle Control Unit (VCU) Diagnostic
Trouble Codes
Group 50 – Hydraulic Valve Controller (HVC) Diagnostic
Trouble Codes
Group 60 – Auxiliary Valve Controller (AVC) Diagnostic
Trouble Codes
Group 70 – Switch Module 1 (SM1) Diagnostic Trouble
Codes
Group 80 – Six – Wheel Drive (6WD) Diagnostic Trouble
Codes
Group 90 – Cab Video Display (VC1) Diagnostic Trouble
Codes

Section 9005 – Operational Checkout
Procedure
Group 10 – Operational Checkout Procedure

Section 9010 – Engine
Group 05 – Theory of Operation
Group 10 – System Diagrams
Group 15 – Diagnostic Information
Group 20 – Adjustments
Group 25 – Tests

Section 9015 – Electrical System
Group 05 – Theory of Operation
Group 10 – System Diagrams
Group 15 – Diagnostic Information
Group 16 – Monitor Operation
Group 17 – Diagnostic Test Box
Group 20 – Adjustments
Group 25 – Tests
Section 9016 – Six – Wheel Drive (6WD)
Group 05 – Theory of Operation
Group 10 – System Diagrams
Group 15 – Diagnostic Information
Group 20 – Adjustments
Group 25 – Tests

Section 9020 – Power Train
Group 05 – Theory of Operation
Group 10 – System Diagrams
Group 15 – Diagnostic Information
Group 25 – Tests

Section 9025 – Hydraulic System
Group 05 – Theory of Operation
Group 10 – System Diagrams
Group 15 – Diagnostic Information
Group 25 – Tests

Section 9031 – Heating and Air Conditioning
Group 05 – Theory of Operation
Group 10 – System Diagrams
Group 15 – Diagnostic Information
Group 25 – Tests

Section APPENDIX
Group System Functional Schematic
Group Hydraulic System Schematic
Group Hydraulic System Schematic—EH Controls