The Komatsu PC100-6 is a robust excavator from the 6 Series, engineered for demanding operational environments. This model features a powerful Komatsu S4D102E-1A diesel engine, delivering 66 kW of net power and 238 Nm of peak torque, coupled with a hydrostatic transmission for efficient power delivery. Its durable construction, with an operating weight of 9800 kg and a compact footprint of 7.46 m in length and 2.46 m in width, makes it a versatile machine for various construction and earthmoving tasks. The PC100-6 is designed for reliability and performance, ensuring productivity and longevity in its intended applications. This All Service Repair Manual provides comprehensive guidance for the Komatsu PC100-6 excavator. It covers essential maintenance procedures, detailed troubleshooting steps, and critical technical specifications, including engine details, hydraulic system information, and performance data. The manual is an indispensable resource for owners, mechanics, and technicians, offering the necessary knowledge to ensure the optimal performance, longevity, and safety of the PC100-6. By following the procedures outlined within, users can effectively maintain and repair the equipment, minimizing downtime and maximizing operational efficiency.