This service manual covers the Komatsu PC400-7, PC400LC-7, PC450-7, PC450LC-7, and PC400LC-8 excavators. Specifically, it applies to PC400-7 and PC400LC-7 models with serial numbers 50001 and up, and PC450-7 and PC450LC-7 models with serial numbers 20001 and up. These excavators are engineered for demanding construction and industrial applications, offering robust performance and reliability.

This comprehensive manual provides detailed information essential for the maintenance, repair, and troubleshooting of your Komatsu excavator. It includes step-by-step procedures, technical specifications, diagnostic information, and safety guidelines. By utilizing this manual, owners, technicians, and mechanics can ensure optimal performance, longevity, and safe operation of their equipment.