John Deere 770G, 770GP, 772G and 772GP Motor Graders (SN: 634380-656507) with iT4/S3B Engines Operation and Test Manual (TM12139)

John Deere 770G, 770GP, 772G and 772GP Motor Graders Operation and Test Manual PDF (TM12139)

This factory Operation and Test Manual provides detailed operating instructions and comprehensive system testing procedures for John Deere 770G, 770GP, 772G, and 772GP Motor Graders equipped with iT4 and S3B engines. Manual TM12139 is intended for operators, field technicians, and service professionals who require accurate guidance for safe operation and precise diagnostics.

Arranged by machine systems and functional groups, the manual explains operating controls, performance checks, and structured test procedures. It supports correct machine evaluation, efficient troubleshooting, and reliable grader operation across demanding work environments.

Models Covered:

John Deere 770G Motor Grader
John Deere 770GP Motor Grader
John Deere 772G Motor Grader
John Deere 772GP Motor Grader

Serial Number Range:

SN: 634380 – 656507

Engine Coverage:

iT4 and S3B Engines

Manual Coverage Includes:

• General Safety Instructions and Operating Guidelines
• Machine Identification and Technical Specifications
• Operator Controls, Displays, and Functional Descriptions
• Engine Operation and Performance Test Procedures
• Fuel System Operation and Diagnostic Testing
• Air Intake, Aftertreatment, and Exhaust System Checks
• Cooling System Operation and Functional Testing
• Transmission Operation and Test Procedures
• Powertrain System Evaluation and Adjustments
• Hydraulic System Operation and Pressure Testing
• Main Pumps, Control Valves, and Circuit Diagnostics
• Steering, Brake, and Articulation System Testing
• Electrical System Operation and Diagnostic Charts
• Electronic Controllers, Sensors, and Calibration Procedures
• Troubleshooting Guides for Operational Issues

Format and Access Features:

• Instant Digital PDF Download
• Language: English
• Fully Searchable and Indexed Content
• High-Resolution Diagrams and Schematics
• Printable Pages for Field or Workshop Use
• Compatible with Windows, macOS, Tablets, and Smartphones
• Clear Layout for Efficient Diagnostics

Why This Operation and Test Manual Is Important:

• Provides factory-approved operating and testing procedures
• Helps diagnose system performance before repairs
• Improves operational safety and machine reliability
• Reduces downtime through accurate troubleshooting
• Essential reference for operators and service technicians
• Supports correct operation of iT4 and S3B engine systems

The John Deere 770G, 770GP, 772G and 772GP Motor Graders Operation and Test Manual PDF (TM12139) is a vital resource for proper machine operation, detailed testing, and dependable grader performance.

Download the John Deere TM12139 Operation and Test Manual PDF to access official factory documentation instantly.

Frequently Asked Questions (FAQ)

Q: What is the purpose of the TM12139 manual?

A: TM12139 provides operating instructions and system test procedures for diagnosing and evaluating motor grader performance.

Q: Which motor grader models are covered?

A: The manual covers John Deere 770G, 770GP, 772G, and 772GP models.

Q: What serial number range does this manual apply to?

A: It applies to machines with serial numbers from 634380 to 656507.

Q: Which engines are included in this manual?

A: The manual covers graders equipped with iT4 and S3B engines.

Q: Does it include hydraulic and transmission testing?

A: Yes, complete hydraulic system and transmission operation and test procedures are included.

Q: Are electrical diagnostics covered?

A: Yes, electrical system operation, diagnostic charts, and electronic calibration procedures are included.

Q: Is this manual suitable for professional service use?

A: Yes, it is designed for dealer technicians, independent service providers, and experienced operators.

Q: Can the manual be printed?

A: Yes, the PDF is fully printable for workshop or on-site reference.