The Komatsu GD670A-2B Motor Grader Workshop Service Repair Manual provides comprehensive technical information for this specific model, covering everything from basic maintenance to complex repairs. It offers detailed instructions and illustrations for every aspect of the machine, ensuring that you have the necessary guidance to perform any task confidently.

This manual is a valuable resource for both seasoned mechanics and do-it-yourself enthusiasts looking to understand and maintain their Komatsu GD670A-2B Motor Grader. Its detailed content includes in-depth instructions for dismantling, adjusting, and troubleshooting various components, including:

• Articulation Joint Assembly:

Provides comprehensive guidance on servicing and repairing the crucial joint that allows the grader's blade to pivot.

Char-Lynn Orbitrol Unit:

Covers the operation and maintenance of this vital hydraulic control system.

Transmission Power Shift (Funk 2263E130B):

Detailed instructions for troubleshooting and repairing the grader's robust transmission.

All Wheel Drive Pump (Rexroth):

Provides detailed information on the all-wheel drive system, including its pump and associated components.

Circle Reverse Motor (Danfoss):

Covers the operation and repair of the motor responsible for reversing the blade.

Circle Reverse Motor P/N 1435 598 H91 (Char-Lynn):

Specific instructions for servicing a common type of circle reverse motor.

Steering & Brake Pump (Eaton Model 70422 RDU):

Detailed information about the hydraulic system responsible for steering and braking.

Hydraulic Motor (Vickers) (All Wheel Drive):

Covers the hydraulic motor used in the all-wheel drive system.

Hydraulic Oil Swivel Block (Four-Way):

Instructions for servicing this critical component of the hydraulic system.

Control Valve Manifolds (Husco 5000C Series):

Provides detailed information on the hydraulic control valves that manage various functions of the grader.

Main System Pump:

Detailed instructions for servicing and troubleshooting the main hydraulic pump.

All Wheel Drive Hydraulic Integrated Circuit (HIC) Valve:

Covers the operation and repair of the valve that manages the all-wheel drive system.

Hydraulic Cylinders:

Provides instructions for servicing and troubleshooting the various hydraulic cylinders used in the grader.

Accumulators (P/N 1285 352 H91, 1279 537 H & 1233 789 H91):

Detailed information on the accumulators used in the hydraulic system.

Troubleshooting and Adjustment Manual:

Offers comprehensive troubleshooting guides and adjustment procedures for various components.

Rear Axle Cooling and Lock/Unlock Differential Pump:

Covers the rear axle cooling system and the differential lock/unlock mechanism.

Circle Reverse Slip Clutch:

Provides instructions for servicing this critical component of the circle reverse system.

Circle Reverse Gear Case:

Detailed instructions for servicing the gear case that houses the circle reverse motor.

Tandem Case (Single and Double Strand Chains):

Provides information on the tandem case assembly and its chain drive system.

Gearbox Assembly (All Wheel Drive):

Detailed instructions for servicing the gearbox used in the all-wheel drive system.

Front Axle Assembly:

Covers the front axle assembly and its components.

Final Drive Assembly (John Deere TeamMate II) with Planetary and Non-Planetary Reduction (NoSpin & Lock/Unlock Differential):

Provides comprehensive instructions for servicing this complex assembly, including its planetary and non-planetary gear systems, no-spin differential, and lock/unlock differential.

Circle Adjustment (Four Shoe):

Detailed instructions for adjusting the circle drive system.

Metric Conversions:

Provides conversions for various measurements, ensuring compatibility with international standards.

Parking Brake Caliper (Perrot P/N 40 023 002):

Specific instructions for servicing this type of parking brake caliper.

Parking Brake Caliper (Mico):

Covers the servicing of another common type of parking brake caliper.

Brake Valve (Rexroth):

Provides information on the brake valve used in the hydraulic system.

Brake Valve (Mico):

Covers the servicing of another type of brake valve.

Wiring Diagrams:

Offers detailed wiring diagrams for the grader's electrical system, simplifying troubleshooting.

Pre-Delivery Procedures:

Provides specific instructions and checklists for pre-delivery inspection and setup.

Suspension Seat:

Covers the operation and adjustment of the suspension seat for operator comfort.

General Torque Values:

Provides a comprehensive table of torque values for various bolts and fasteners.

Metric Conversions:

Provides conversions for various measurements, ensuring compatibility with international standards.

This manual offers detailed, step-by-step instructions, supported by clear illustrations, drawings, and photographs. It assists you in accurately diagnosing and repairing any issue, saving time and resources. You’ll also find warnings, cautions, and notes throughout the manual, highlighting critical information and safety procedures for each step. The comprehensive table of contents enables quick navigation and access to specific information.

The Komatsu GD670A-2B Motor Grader is a powerful and versatile machine designed for a wide range of heavy-duty construction and maintenance tasks. It is a large, tracked machine with a rigid frame, a powerful engine, and a long, articulated blade that allows for precise and efficient grading, leveling, and shaping of various surfaces. This model is known for its exceptional maneuverability, thanks to its advanced hydraulic system and articulated design, making it ideal for working in confined spaces and on challenging terrains. The GD670A-2B is equipped with a robust Komatsu engine, providing ample power and torque for demanding applications. It also features a range of operator-friendly features, such as a spacious and comfortable cab with ergonomic controls, excellent visibility, and advanced safety systems.

The Komatsu GD670A-2B Motor Grader is designed for a wide range of applications, including road construction, site preparation, landscaping, and maintenance of airports, parking lots, and other large areas. Its versatility is enhanced by the ability to equip it with a variety of attachments, such as rippers, scarifiers, snow plows, and dozers. This allows the machine to tackle a wider range of tasks with increased efficiency and productivity. The GD670A-2B is a reliable and durable machine, built with robust components and designed for extended service life. Komatsu is known for its commitment to quality and innovation, and the GD670A-2B Motor Grader is a testament to this reputation. Its powerful performance, advanced features, and high level of durability make it a valuable asset for any construction or maintenance project.