This manual covers the Komatsu PC400-7, PC400LC-7, PC450-7, and PC450LC-7 excavators, designed for heavy construction and digging applications. These diesel-powered digging excavators are engineered for robust performance and reliability in demanding environments. Their operational speed is variable, adapting to hydraulic conditions and load requirements, ensuring efficient operation across a range of tasks.

This Workshop Service Repair Manual provides comprehensive information essential for the maintenance and repair of your Komatsu excavator. It details critical procedures, troubleshooting guides, technical specifications, and safety protocols. By following the recommended service intervals and fluid guidelines outlined within, owners and technicians can ensure the longevity and optimal performance of their equipment.