This comprehensive service and repair manual provides detailed instructions and technical specifications for Komatsu PC1000-1, PC1000LC-1, PC1000SE-1, and PC1000SP-1 hydraulic excavators manufactured from 1991 to 1997. The manual covers a wide range of topics, including: * **General information:** Covers the excavator's specifications, safety precautions, and operating procedures. * **Engine:** Provides detailed information on engine components, maintenance, troubleshooting, and repair procedures. * **Hydraulic system:** Addresses the hydraulic system, including pumps, valves, cylinders, and circuits. * **Undercarriage:** Covers the undercarriage components, such as tracks, rollers, and sprockets. * **Electrical system:** Includes information on the electrical system, wiring diagrams, and troubleshooting. * **Cab and controls:** Provides guidance on the cab and control systems, including operator's station, instrument panel, and controls. * **Troubleshooting and repair procedures:** Offers comprehensive troubleshooting guides and repair procedures for various components and systems. * **Parts lists and diagrams:** Includes detailed parts lists and diagrams for easy identification and ordering. This manual is an essential resource for technicians, mechanics, and owners who need to service, maintain, or repair Komatsu PC1000-1 series hydraulic excavators. The detailed information and clear illustrations make it easy to understand and apply the provided instructions.