John Deere 770G, 770GP, 772G, and 772GP Motor Grader Operation & Test Technical Manual (TM12139)

TM12139 - 770G, 770GP, 772G, and 772GP Motor Grader (Engine 6090HDW11, Engine 6090HDW16) Technical Manual (Operation and Test).pdf
2,090 pages, bookmarked, Searchable, Printable, high quality PDF

Complete technical Operation & Test Manual with electrical wiring diagrams for John Deere 770G, 770GP, 772G, and 772GP Motor Grader. It's the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.

John Deere 770G, 770GP, 772G, and 772GP Motor Grader Operation & Test Technical Manual (including maintenance, overhaul, disassembling & assembling, adjustment, tune-up, operation, inspecting, diagnostic & troubleshooting…) is divided into different sections. Each section covers a specific component or system with detailed illustrations. A table of contents is placed at the beginning of each section. Pages are easily found by category, and each page is expandable for great detail. The printer-ready PDF documents work like a charm on all kinds of devices.

CONTENTS
Foreword
9000 - General Information
9001 - Diagnostics
9005 - Operatinal Checkout Procedure
9010 - Engine
9015 - Electrical System
9016 - Six Wheel Drive (6WD)
9020 - Power Train
9025 - Hydraulic System
9031- Heating and Air Conditioning
...
6WD Controller Calibration (If Equipped)
This procedure calibrates the 6WD controller with 6WD pumps and motors to determine correct front wheel speed in each gear. Recalibrate upon notice of degraded 6WD performance.
NOTE: Calibration procedure will take approximately 15 minutes once hydraulic oil temperature is over 25°C (77°F).
1. Position machine with all wheels on the ground.
2. Check for any active diagnostic trouble codes (DTCs). See Reading Diagnostic Trouble Codes (DTC) With Service ADVISORTM Application . (Group 9015-20.)
3. Move transmission control and park brake lever to park. Shut engine OFF.
4. Remove rear interior panel from cab to access calibration connectors.
5. Disconnect 6WD run mode connector (X88) from the 6WD run/calibrate mode connector (X86). Connect 6WD calibrate mode connector (X87) to 6WD run/calibrate mode connector (X86).
TX1087063A-UN: 6WD Calibration Connectors
LEGEND:
X86 - 6WD Run/Calibrate Mode Connector
X87 - 6WD Calibrate Mode Connector
X88 - 6WD Run Mode Connector
6. TX1055019A-UN: 6WD Switch
...