This comprehensive Komatsu Service Manual provides detailed servicing instructions and repair procedures for the 72-2, 75-2, 78-1, and 84-2 series diesel engines used in Komatsu hydraulic excavators. The manual offers complete step-by-step information, guiding you through every aspect of repair, servicing, preventative maintenance, and troubleshooting.

The content is organized in a user-friendly way, featuring clear photos and illustrations alongside detailed instructions. This ensures you can easily follow each step and complete the procedure correctly.

The manual covers a wide range of topics, including the engine, water coolant pump, track rollers, cylinder head, radiator, oil cooler, arm-bucket, boom-bucket, solenoid, canopy, cab, heating fan, fuel tank, hydraulic tank, P.T.O. power train, swing circle, final drive track, frame recoil, spring carrier roller, track roller, steel shoe, hydraulic, circuit diagrams, hydraulic pump control valve, swivel joint, swing motor, travel motor, cylinders, accumulator, PPC valves, solenoid valve, electrical diagrams, testing and adjustments, removal and installation, special tools, starter motor, alternator, injection pump, engine-pump, control valve, platform, swivel joint, revolving frame, swing circle, rubber track shoes, steel track shoes, sprocket wheel, final drive, idler and recoil spring, spring recoil and thrust cylinder, idler, track rollers, boom cylinder, arm cylinder, bucket cylinder, boom swing cylinder, blade cylinder, and work equipment cylinders.

This manual serves as an indispensable resource for anyone involved in maintaining and repairing Komatsu excavators with these specific diesel engines. It will help you better understand your equipment, ensure proper care, and ultimately lower your repair and maintenance costs.

The Komatsu Service Diesel Engines 72-2, 75-2, 78-1, and 84-2 series are a range of robust and reliable powerplants designed specifically for use in Komatsu's compact hydraulic excavators. These engines are renowned for their high performance, fuel efficiency, and durability, making them an ideal choice for demanding construction and earthmoving applications. The engines are available in various configurations to suit the specific requirements of different excavator models, including the PC05-5, PC05-6, PC05-7, PC07-1, PC10-5, PC10-6, PC10-7, PC25-1, PC30-7, PC15-3, PC20-7, JV40CW·C·CR·W-2, PC40-7, and PC45-1.

These compact hydraulic excavators are designed for a wide range of tasks, from digging trenches and foundations to landscaping and demolition. The PC05 and PC10 series are particularly popular for their versatility and maneuverability, making them well-suited for tight spaces and urban environments. The larger PC25, PC30, and PC40 models pack more power and digging force, making them ideal for heavier-duty applications. These excavators feature a variety of standard features, including hydraulically operated booms and sticks, adjustable bucket widths, and various attachments for added versatility. Komatsu's focus on operator comfort and safety is evident in the ergonomic design of the cabs, which offer ample legroom, visibility, and intuitive controls. The excavators also boast advanced safety features like emergency shutdown systems and load sensing hydraulics.