The Komatsu PC400-7 PC400LC-7 Hydraulic Excavator Factory Service Repair Manual provides a comprehensive guide for maintaining and repairing your Komatsu excavator. This official factory manual is not a third-party document and covers the same information used by Komatsu factory-trained technicians.

This manual covers a wide range of topics, starting with general information like specifications, weight tables, fuel, coolant, and lubricants. It delves into the structure and function of the excavator, explaining engine control, powertrain systems, hydraulic piping, circuit diagrams, clutch, transmission, damper, steering, braking, and more.

The manual provides detailed instructions for testing and adjusting various components, including engine speed, exhaust color, valve clearance, compression pressure, injection timing, oil pressure, fan belt tension, and more. It also includes procedures for bleeding air from hydraulic circuits and adjusting linkages.

Disassembly and assembly instructions are provided for numerous components, including the starting motor, alternator, fuel injection pump, water pump, thermostat, cylinder head, radiator, engine, damper, clutch, transmission, steering pump, and more.

The manual also includes maintenance standards for critical components such as the clutch, transmission, damper, universal joint, steering pump, steering cylinder, final drive, track frame, idler, track roller, hydraulic pump, hydraulic control valve, and more.

Finally, the manual covers additional topics like the timing dozer, electrical wiring diagrams, monitor systems, and sensors.

This thorough manual offers detailed illustrations, diagrams, and specifications to guide you through any repair procedure. An advanced troubleshooting guide helps diagnose and correct problems. With step-by-step instructions and numerous illustrations, this manual empowers you to confidently maintain and repair your Komatsu PC400-7 PC400LC-7 Hydraulic Excavator.

The Komatsu PC400-7 and PC400LC-7 are heavy-duty hydraulic excavators renowned for their robust construction, powerful performance, and advanced technology. These excavators are a staple in the construction, mining, and demolition industries, handling tasks ranging from digging and loading to heavy lifting and material handling. The PC400-7 and PC400LC-7 share a common chassis and engine but differ in their design and features to cater to specific applications. The PC400-7 boasts a conventional boom and stick configuration, ideal for general excavating and material handling, while the PC400LC-7 features a long reach boom and stick, making it suitable for demolition and other applications requiring extended reach.

Both models are powered by a Komatsu SAA6D140E-6 engine, known for its efficiency and low emissions. This engine delivers substantial power and torque, enabling the excavators to handle heavy loads with ease. The hydraulic system incorporates a closed-center, load-sensing design, resulting in efficient operation and reduced fuel consumption. The excavators are equipped with sophisticated control systems that optimize performance and enhance operator comfort. The cab offers excellent visibility and ergonomic controls, designed to minimize operator fatigue during long shifts. Additionally, Komatsu has implemented a range of safety features, such as a comprehensive warning system and an optional rearview camera, to ensure a safe working environment for the operator and those around the excavator.