John Deere 670G, 670GP, 672G and 672GP Motor Graders (SN: 634754-656507) with S2/S3A Engines Repair Manual (TM12138)

John Deere 670G, 670GP, 672G and 672GP Motor Graders Repair Manual PDF (TM12138)

This factory Repair Manual provides complete repair, overhaul, and component-level servicing procedures for John Deere 670G, 670GP, 672G, and 672GP Motor Graders equipped with S2 and S3A engines. Manual TM12138 is developed for professional technicians, dealer service departments, and heavy equipment repair specialists requiring precise factory repair guidance.

Organized by system and subassembly, the manual delivers detailed disassembly, inspection, repair, and reassembly instructions supported by technical specifications, service limits, and adjustment data. It enables accurate repairs, reliable troubleshooting, and long-term grader performance under demanding working conditions.

Models Covered:

John Deere 670G Motor Grader
John Deere 670GP Motor Grader
John Deere 672G Motor Grader
John Deere 672GP Motor Grader

Serial Number Range:

SN: 634754 – 656507

Engine Coverage:

S2 and S3A Engines

Manual Coverage Includes:

• General Safety Guidelines and Machine Identification
• Technical Specifications, Service Data, and Wear Limits
• Engine Repair, Disassembly, and Rebuild Procedures
• Fuel System Testing, Calibration, and Component Repair
• Air Intake and Exhaust System Servicing
• Cooling System Diagnostics and Component Repair
• Transmission, Differential, and Powertrain Repairs
• Tandem, Axle, and Final Drive Overhaul Procedures
• Hydraulic System Repair, Pressure Testing, and Adjustments
• Main Pumps, Control Valves, and Hydraulic Circuit Servicing
• Steering, Frame, and Articulation System Repairs
• Brake System Inspection, Repair, and Adjustment
• Electrical System Diagnostics and Wiring Schematics
• Electronic Controllers, Sensors, and Calibration Procedures
• Torque Specifications, Clearances, and Assembly Data

Format and Access Features:

• Instant Digital PDF Download
• Language: English
• Fully Searchable and Indexed Manual
• High-Resolution Diagrams and Technical Illustrations
• Printable Pages for Workshop and Field Use
• Compatible with Windows, macOS, Tablets, and Smartphones
• Logical Structure for Fast Repair Reference

Why This Repair Manual Is Valuable:

• Factory-approved repair and rebuild procedures
• Supports precise diagnostics and correct servicing
• Helps reduce downtime and repair errors
• Ensures compliance with John Deere service standards
• Essential for major repairs and component overhauls
• Reliable reference for S2 and S3A engine platforms

The John Deere 670G, 670GP, 672G and 672GP Motor Graders Repair Manual PDF (TM12138) supplies the professional-level technical detail required for dependable repairs and long equipment service life.

Download the John Deere TM12138 Repair Manual PDF today for immediate access to official factory repair documentation.

Frequently Asked Questions (FAQ)

Q: What is the purpose of the TM12138 manual?

A: TM12138 provides complete repair, overhaul, and component servicing procedures for covered motor graders.

Q: Which John Deere grader models are included?

A: It covers John Deere 670G, 670GP, 672G, and 672GP motor graders.

Q: What serial numbers does this repair manual apply to?

A: This manual applies to machines with serial numbers from 634754 to 656507.

Q: Which engines are covered in this manual?

A: The manual supports graders equipped with S2 and S3A engines.

Q: Does it include hydraulic and powertrain repair procedures?

A: Yes, it includes complete hydraulic system, transmission, axle, and powertrain repair information.

Q: Are electrical and electronic systems covered?

A: Yes, wiring diagrams, electronic diagnostics, and calibration procedures are included.

Q: Is this manual suitable for professional workshops?

A: Yes, it is intended for dealer service centers, independent repair shops, and experienced technicians.

Q: Can the PDF be printed for shop use?

A: Yes, the manual is fully printable for workshop or field reference.