This comprehensive service repair manual is designed for Komatsu GD610, GD620, GD660, and GD670 series motor graders. It provides in-depth information covering maintenance, assembly, disassembly, and servicing procedures for your Komatsu motor grader. The manual includes detailed instructions for a wide range of components, ensuring that you have the knowledge and tools necessary to perform repairs and maintenance effectively.

This manual covers a wide range of serial numbers for various models, including the GD621A-1, GD622A-1, GD623A-1, GD625A-1, GD672A-1, GD611A-1, GD613A-1, GD661A-1, GD663A-1, GD621R-1, GD623R-1, GD611R-1, GD613R-1, GD615A-1, GD625A-1C, GD625A-1A, and GD625A-1B. The manual also includes specific information for different engine models, including the S6D105-1, 6D125-1, and S6D110-1 engines, with cross-references to the respective engine shop manuals.

The manual is organized into sections covering various systems, including the engine, power train, steering system, brake system, hydraulic system, work equipment, electric and electronic systems, and other miscellaneous components. This comprehensive structure allows you to quickly locate the specific information you need for any repair or maintenance task. Each section is filled with detailed diagrams, illustrations, and technical specifications, providing a thorough understanding of the components and their functions.

This manual will enable you to diagnose and troubleshoot issues independently, saving you time and money. With its detailed instructions and clear explanations, you can confidently perform repairs and maintain your Komatsu motor grader to the highest standards.

## Komatsu GD610, GD620, GD660, GD670 Series Motor Graders: A Powerful Force in Construction

The Komatsu GD610, GD620, GD660, and GD670 series motor graders are renowned for their exceptional performance and reliability, making them indispensable tools in the construction and infrastructure industries. These powerful machines are designed for a wide range of applications, including road construction, site preparation, and material handling. With their robust build and advanced technology, the GD series motor graders deliver precise grading, efficient material movement, and superior versatility.

These models boast a range of features that contribute to their exceptional performance. The hydraulically controlled blade, with its adjustable elevation, angle, and tilt, allows for high-precision grading and shaping of various surfaces. The powerful engine, combined with the advanced transmission and drivetrain, ensures smooth operation and efficient power delivery, even in challenging conditions. The ergonomic operator's cab is designed to maximize comfort and visibility, providing operators with a commanding view of the work area and easy access to controls. Komatsu's commitment to safety is evident in the comprehensive safety systems integrated into these graders, including a robust ROPS (Roll-Over Protective Structure) and FOPS (Falling Object Protective Structure). The GD610, GD620, GD660, and GD670 series motor graders are also known for their durability and low maintenance requirements, contributing to their high resale value and making them a cost-effective investment for construction businesses.