This full service repair manual covers the Komatsu PC800-8 and PC800LC-8 excavators, part of the 8 Series generation. These machines are powered by a Komatsu SAA6D140E-5 Diesel Engine, a water-cooled unit with a displacement of 15.24 L and an approximate power output of 383 HP at 2000 RPM. They feature a hydrostatic transmission with a 2-speed automatic system. The PC800-8 model has dimensions of 11,630 mm in length, 3,540 mm in width, and 3,700 mm in height, with an operating weight of 73,950 kg and 505 mm of ground clearance. This comprehensive manual provides essential information for maintaining and repairing your Komatsu excavator. It details critical procedures, including engine oil capacity of 40 L, coolant capacity of 72 L, and hydraulic oil capacity of 550 L, alongside guidance on service intervals for oil and filters. The manual is designed to assist owners, mechanics, and technicians in understanding the vehicle's systems, performing routine maintenance, and addressing potential issues to ensure optimal performance and longevity.