The Komatsu PC220-8 and PC220LC-8 excavators represent robust engineering designed for demanding operational environments. These machines, part of the PC220-8 Series, are powered by the SAA6D107E-1 engine, an inline 6-cylinder turbocharged diesel with a displacement of 6.67 L, delivering approximately 125 kW (168 HP) and meeting EPA Tier 3 / EU Stage IIIA emissions standards. Featuring a hydrostatic transmission and all-wheel drive, they offer efficient power transfer. The hydraulic system utilizes an open-center load sensing design with variable displacement piston pumps, ensuring responsive control. With operating weights around 22,000 kg for the PC220-8 and 23,340 kg for the PC220LC-8, these excavators provide stability and performance for a wide range of construction and earthmoving tasks, complemented by features like a ROPS certified cab for operator safety. This comprehensive manual provides essential information for the maintenance and repair of the Komatsu PC220-8 and PC220LC-8 excavators. It includes detailed workshop procedures, operation and maintenance guidelines, and technical specifications for both the excavators and their SAA6D107E-1 engines. The content covers critical areas such as engine oil, hydraulic oil, and coolant capacities, as well as specifications for track shoe widths, digging depth, reach, and bucket force. This resource is intended to assist owners, mechanics, and technicians in understanding the machine's systems, performing routine maintenance, and executing repairs effectively, thereby ensuring optimal performance and longevity of the equipment.