This comprehensive manual offers a detailed guide to servicing and maintaining Komatsu PC138US-8 and PC138USLC-8 hydraulic excavators. It combines two essential manuals, delivering comprehensive information for both technicians and operators. The Service Repair Manual provides step-by-step instructions for troubleshooting, diagnosing, and repairing various components of the excavator, including the engine, hydraulic system, electrical system, and undercarriage. It features detailed diagrams, exploded views, and clear instructions to assist in accurate repair procedures. The Operation & Maintenance Manual focuses on the safe and efficient operation of the excavator, covering topics such as pre-operational checks, daily maintenance routines, troubleshooting common issues, and recommended operating procedures. This manual serves as a valuable resource for maximizing the performance and lifespan of your Komatsu PC138US-8 or PC138USLC-8 excavator.

The Komatsu PC138US-8 and PC138USLC-8 are powerful and versatile hydraulic excavators designed for a wide range of construction, demolition, and earthmoving applications. These machines are renowned for their robust construction, reliable performance, and operator comfort. The PC138US-8 is a standard model, while the PC138USLC-8 is a long-undercarriage version, offering increased stability and maneuverability in confined spaces. Both models feature a powerful Komatsu SAA4D107E-1 engine, providing ample power for demanding tasks. The engine is paired with a sophisticated hydraulic system, delivering smooth and precise control of the excavator's movements. This includes the boom, arm, bucket, and swing functions, enabling efficient and accurate operation in various terrains and work conditions. Komatsu has incorporated several features to enhance operator comfort and productivity on the PC138US-8 and PC138USLC-8. A spacious and ergonomically designed cab provides a comfortable working environment, with adjustable seats, intuitive controls, and excellent visibility. The cab also features a climate control system, reducing operator fatigue during long shifts. The excavators are equipped with advanced safety features, including a ROPS/FOPS certified cab and a comprehensive warning system to minimize the risk of accidents. The PC138US-8 and PC138USLC-8 are designed for easy maintenance, with readily accessible components and service points, minimizing downtime and maximizing efficiency. Furthermore, Komatsu offers a wide range of attachments, including different types of buckets, breakers, and grapples, allowing operators to customize the excavators for specific tasks.