This comprehensive Komatsu GD670A GD670AW Motor Grader Factory Service Repair Manual provides detailed instructions and illustrations for maintaining and repairing your machine. It covers a wide range of topics, including:

**Articulation Joint Assembly:** This section provides detailed information on the articulation joint assembly, including its components, operation, and maintenance procedures.

**Char-Lynn Orbitrol Unit:** The manual offers insights into the Char-Lynn orbitrol unit, covering its function, troubleshooting, and repair methods.

**Transmission Power Shift (Funk 2263E130B):** This section delves into the intricacies of the Funk 2263E130B transmission power shift, providing guidance on its operation, maintenance, and troubleshooting.

**All Wheel Drive Pump (Rexroth):** The manual includes detailed information on the Rexroth all-wheel drive pump, covering its working principle, maintenance, and repair procedures.

**Circle Reverse Motor (Danfoss):** You'll find comprehensive information on the Danfoss circle reverse motor, encompassing its operation, troubleshooting, and repair techniques.

**Circle Reverse Motor P/N 1435 598 H91 (Char-Lynn):** The manual offers in-depth knowledge about the Char-Lynn circle reverse motor, including its function, maintenance, and repair procedures.

**Steering & Brake Pump (Eaton Model 70422 RDU):** This section provides detailed information on the Eaton model 70422 RDU steering and brake pump, covering its operation, maintenance, and troubleshooting.

**Hydraulic Motor (Vickers) (All Wheel Drive):** The manual includes comprehensive information on the Vickers hydraulic motor for all-wheel drive systems, encompassing its operation, maintenance, and repair techniques.

**Hydraulic Oil Swivel Block (Four-Way):** You'll find detailed information on the four-way hydraulic oil swivel block, including its function, maintenance, and repair procedures.

**Control Valve Manifolds (Husco 5000C Series):** This section provides detailed instructions on the Husco 5000C series control valve manifolds, encompassing their operation, maintenance, and troubleshooting.

**Main System Pump:** The manual covers the main system pump in detail, providing information on its operation, maintenance, and repair procedures.

**All Wheel Drive Hydraulic Integrated Circuit (HIC) Valve:** You'll find comprehensive information on the all-wheel drive hydraulic integrated circuit valve, including its function, maintenance, and repair techniques.

**Hydraulic Cylinders:** The manual includes detailed information on the hydraulic cylinders, covering their operation, maintenance, and repair procedures.

**Accumulators (P/N 1285 352 H91, 1279 537 H & 1233 789 H91):** This section provides detailed information on the accumulators, including their function, maintenance, and repair procedures.

**Troubleshooting and Adjustment Manual:** The manual offers a comprehensive troubleshooting and adjustment guide, helping you identify and resolve common issues with the machine.

**Rear Axle Cooling and Lock/Unlock Differential Pump:** You'll find detailed information on the rear axle cooling and lock/unlock differential pump, including its operation, maintenance, and repair procedures.

**Circle Reverse Slip Clutch:** The manual covers the circle reverse slip clutch in detail, providing information on its operation, maintenance, and repair procedures.

**Circle Reverse Gear Case:** This section provides detailed information on the circle reverse gear case, including its components, operation, and maintenance procedures.

**Tandem Case (Single and Double Strand Chains):** The manual offers insights into the tandem case, covering its function, troubleshooting, and repair methods.

**Gearbox Assembly (All Wheel Drive):** This section delves into the intricacies of the all-wheel drive gearbox assembly, providing guidance on its operation, maintenance, and troubleshooting.

**Front Axle Assembly:** The manual includes detailed information on the front axle assembly, covering its working principle, maintenance, and repair procedures.

**Final Drive Assembly (John Deere TeamMate II) with Planetary and Non-Planetary Reduction (NoSpin & Lock/Unlock Differential):** You'll find comprehensive information on the John Deere TeamMate II final drive assembly, encompassing its operation, maintenance, and repair techniques.

**Circle Adjustment (Four Shoe):** The manual covers the circle adjustment system in detail, providing information on its operation, maintenance, and repair procedures.

**Metric Conversions:** The manual includes a comprehensive table of metric conversions for easy reference.

**Parking Brake Caliper (Perrot P/N 40 023 002):** This section provides detailed information on the Perrot P/N 40 023 002 parking brake caliper, covering its operation, maintenance, and troubleshooting.

**Parking Brake Caliper (Mico):** The manual includes detailed information on the Mico parking brake caliper, covering its working principle, maintenance, and repair procedures.

**Brake Valve (Rexroth):** You'll find comprehensive information on the Rexroth brake valve, including its function, maintenance, and repair techniques.

**Brake Valve (Mico):** The manual covers the Mico brake valve in detail, providing information on its operation, maintenance, and repair procedures.

**Wiring Diagrams:** The manual includes detailed wiring diagrams for the machine's electrical system, making it easy to troubleshoot and repair electrical problems.

**Pre-Delivery Procedures:** This section provides a comprehensive guide to pre-delivery procedures for the Komatsu GD670A GD670AW Motor Grader.

**Suspension Seat:** The manual covers the suspension seat in detail, providing information on its operation, maintenance, and repair procedures.

**General Torque Values:** The manual includes a comprehensive table of general torque values for easy reference.

**Metric Conversions:** The manual includes a comprehensive table of metric conversions for easy reference.

This manual provides a wealth of information for anyone who needs to maintain, repair, or troubleshoot a Komatsu GD670A GD670AW Motor Grader. With its detailed instructions, clear illustrations, and comprehensive troubleshooting guides, this manual is an indispensable resource for any serious owner or mechanic.

## The Komatsu GD670A/AW: A Powerful and Versatile Motor Grader

The Komatsu GD670A and GD670AW are heavy-duty motor graders designed for demanding construction and infrastructure projects. These machines boast exceptional power and versatility, making them ideal for a wide range of applications, including road construction and maintenance, site preparation, and material handling. The GD670A is the standard model, while the GD670AW features a wider blade for enhanced grading capabilities.

Both models are powered by a robust Komatsu SAA6D140E-3 engine, delivering impressive torque and horsepower. The engine is coupled with a smooth and responsive hydrostatic transmission, allowing for precise control and efficient operation. The GD670A/AW features a durable, heavy-duty undercarriage with a robust frame and axles, ensuring stability and long-term performance. The hydraulic system provides ample power to operate the blade, moldboard, and other attachments, enabling precise grading and sculpting of surfaces. The spacious operator cabin offers excellent visibility and ergonomic controls, enhancing operator comfort and productivity. With its advanced features and sophisticated design, the Komatsu GD670A/AW provides a reliable and efficient tool for contractors and operators seeking to tackle the most challenging projects.

## Key Features and Benefits

The Komatsu GD670A/AW motor graders offer an impressive array of features and benefits that contribute to their productivity, efficiency, and user-friendliness. The key features include:

* **Powerful and efficient Komatsu engine:** Delivers exceptional torque and horsepower for smooth and efficient operation in demanding environments.
* **Hydrostatic transmission:** Offers precise control and responsiveness, allowing for seamless operation and precise grading.
* **Durable undercarriage:** Robust frame and axles ensure stability and long-term performance.
* **Advanced hydraulic system:** Provides ample power for blade, moldboard, and other attachments, enabling precise grading and sculpting of surfaces.
* **Spacious operator cabin:** Offers excellent visibility and ergonomic controls for enhanced operator comfort and productivity.
* **Multiple blade options:** Available in standard and wide blade configurations to accommodate various project needs.
* **Wide range of attachments:** Can be equipped with a variety of attachments for enhanced versatility, including rippers, snowplows, and scarifiers.

These features combined with its robust construction and advanced technology, make the Komatsu GD670A/AW a reliable and versatile tool for a wide range of construction projects.