This comprehensive Komatsu PC400 PC450 400LC-7 450LC-7 Factory Service Repair Manual provides detailed information and instructions to help you maintain and repair your excavator. It covers a wide range of topics, including general information about the machine, its structure and function, testing and adjustment procedures, disassembly and assembly instructions, maintenance standards, repair and replacement of parts, and much more. You will find detailed information on the engine, powertrain, steering and suspension system, air system, work equipment, and electrical and electronic systems. This manual is an invaluable resource for anyone who wants to perform their own repairs and maintenance on their Komatsu excavator.

The Komatsu PC400 and PC450 are powerful and versatile hydraulic excavators designed for demanding construction projects. These models represent the seventh generation (LC-7) of Komatsu excavators and are known for their advanced features, robust build, and high productivity. The PC400 and PC450 share a similar platform, with the PC450 offering a larger operating weight and greater digging force. Both models feature a powerful Komatsu SAA6D140E-7 engine, known for its efficiency and durability. The engine's high torque output is effectively transmitted through a hydraulic system that provides precise control and smooth operation. These excavators are equipped with large, reinforced booms and arms, allowing them to handle heavy loads and work in challenging terrain. The spacious and well-designed cab provides operators with excellent visibility and a comfortable working environment. With various optional attachments, the PC400 and PC450 can adapt to a wide range of applications, including excavation, loading, demolition, and material handling.

The Komatsu PC400 and PC450 LC-7 models are equipped with a comprehensive suite of features designed to enhance operator safety and efficiency. These features include advanced control systems, a comprehensive monitoring system, and a robust safety structure. The Komatsu EMMS (Equipment Management Monitoring System) provides real-time machine performance data, allowing operators and maintenance personnel to monitor machine health and optimize productivity. The cabs are designed to meet the highest safety standards, with features such as rollover protection structures (ROPS) and falling object protection structures (FOPS). The integrated safety systems, combined with the machines' robust construction, contribute to a safe and reliable working environment for operators. The Komatsu PC400 and PC450 LC-7 are ideally suited for demanding construction projects where high productivity, reliability, and safety are essential.