This comprehensive Komatsu PC400-7EO and PC450-7EO shop service repair manual provides in-depth technical information for technicians and mechanics specializing in these powerful excavators. The manual covers a wide range of essential topics, making it an invaluable resource for servicing, troubleshooting, and maintaining these machines. It features a detailed index and foreword, ensuring easy navigation through the extensive content. The manual delves into the intricate structure, function, and maintenance standards of the PC400-7EO and PC450-7EO models. A comprehensive standard value table provides essential reference data for accurate diagnostics and repairs. Detailed testing and adjusting procedures are outlined, enabling technicians to precisely calibrate and optimize system performance. Troubleshooting sections equip mechanics with the knowledge to efficiently diagnose and resolve a multitude of potential issues. The manual also includes comprehensive disassembly and assembly instructions, providing step-by-step guidance for any necessary component replacement or repair. Detailed diagrams and drawings further enhance understanding, enabling clear visualization of the excavator's mechanical systems and components. This manual covers specific model and serial number ranges, ensuring its applicability to the appropriate Komatsu excavators: * PC400-7E0: Serial numbers 60001 and up * PC400LC-7E0: Serial numbers 60001 and up * PC450-7E0: Serial numbers 30001 and up * PC450LC-7E0: Serial numbers 30001 and up

## Komatsu PC400-7EO & PC450-7EO Excavators: Power and Precision in Construction The Komatsu PC400-7EO and PC450-7EO are heavy-duty excavators designed for large-scale construction projects. These powerful machines offer impressive digging force and lifting capacity, making them ideal for demanding applications such as earthmoving, quarrying, and infrastructure development. The "EO" designation indicates an enhanced operational configuration, featuring key improvements and advancements over previous models. Both the PC400-7EO and PC450-7EO share a robust design, built with high-quality components and advanced engineering for optimal performance and long-lasting durability. The PC400-7EO boasts a powerful 174 kW (233 hp) engine, offering impressive digging force and lifting capacity, while the larger PC450-7EO utilizes a 191 kW (256 hp) engine, further increasing its capabilities. Both models are equipped with advanced hydraulic systems designed for smooth and efficient operation, ensuring precise control and responsiveness even under heavy loads. The Komatsu PC400-7EO and PC450-7EO are built with operator comfort and safety in mind. The spacious and ergonomically designed cab features a user-friendly interface with intuitive controls, providing a comfortable and efficient working environment for the operator. Safety features include a comprehensive ROPS (Rollover Protective Structure) and FOPS (Falling Object Protective Structure) design, along with a wide range of safety systems and alerts to protect the operator and enhance overall jobsite safety. These excavators are renowned for their fuel efficiency, contributing to lower operating costs and reduced environmental impact. The advanced engine technology and hydraulic systems are carefully optimized to minimize fuel consumption without compromising performance. The PC400-7EO and PC450-7EO are supported by a comprehensive Komatsu service network, providing access to genuine parts, skilled technicians, and expert advice for efficient maintenance and long-term operational excellence.