This manual covers the Komatsu PC270-7 excavator, part of the Dash 7 Series. This heavy-duty machine is engineered for demanding construction and earthmoving applications. Its robust construction, hydrostatic transmission, and powerful Komatsu SAA6D102E-2 diesel engine, displacing 6.4 liters, provide reliable performance and efficiency. With an operating weight of approximately 27,000 kg, a digging depth of up to 6.75 meters, and a reach of over 10 meters, the PC270-7 is designed for productivity and durability in challenging environments. This comprehensive service manual provides essential information for the maintenance, repair, and operation of the Komatsu PC270-7. It includes detailed shop manual content for the excavator and its Komatsu 102 series engine, alongside the operation and maintenance manual. Owners, technicians, and mechanics will find detailed procedures, technical specifications, and troubleshooting guidance to ensure optimal performance and longevity of the equipment. The manual is designed to facilitate effective upkeep and repair, covering critical aspects of the machine's systems.