This comprehensive workshop repair manual is specifically designed for the Komatsu PC400-7 Excavator, covering serial numbers 50001 and up. It is your ultimate resource for understanding the intricate workings of this powerful machine, diagnosing potential issues, and performing effective repairs and maintenance procedures. This manual caters to both experienced mechanics and those just starting out, providing detailed guidance on disassembly, inspection, rebuilding, and assembly of various components. Dive into the extensive content, covering crucial aspects like the general overview, structural and functional details, comprehensive testing and adjusting procedures, meticulous disassembly and assembly instructions, essential maintenance standards, and additional supplementary information that will enhance your understanding of the Komatsu PC400-7. This manual empowers you with the knowledge and expertise to confidently tackle any maintenance or repair challenge you encounter.

The Komatsu PC400-7 is a powerful and versatile hydraulic excavator renowned for its robust construction, high productivity, and advanced features. This model, introduced in 2007, represents a significant advancement in the Komatsu excavator lineup. It boasts a powerful Komatsu SAA6D140E-5 engine, providing a maximum output of 239 kW (321 hp), ensuring ample power for tackling demanding excavation tasks. The PC400-7 incorporates a durable undercarriage with a heavy-duty track frame and wide track shoes, providing excellent stability and traction across challenging terrain. Its spacious and ergonomically designed cab offers a comfortable and safe operating environment for the operator, equipped with a comprehensive instrumentation panel for monitoring vital machine functions. Furthermore, the PC400-7 leverages a range of innovative technologies to enhance performance and efficiency. The hydraulic system, featuring a variable displacement pump, optimizes hydraulic flow and reduces fuel consumption. The electronic control system ensures precise and responsive operation, enabling the operator to execute intricate movements with ease. The excavator also incorporates a sophisticated safety system, including an overload protection system, preventing damage to the machine and ensuring operator safety. The Komatsu PC400-7, available with various configurations and attachments, is a highly sought-after excavator in the construction, mining, and quarrying industries. Its reliable performance, advanced features, and operator-centric design make it a formidable tool for tackling demanding projects and maximizing productivity.