This manual covers the Komatsu Dash 6 Series excavators, specifically the PC100-6, PC120-6, and PC130-6 models. These machines are engineered for robust performance in demanding work environments, featuring reliable 4-stroke, water-cooled, direct injection diesel engines from the 102 Series. The PC100-6 is powered by the S4D102E-1 engine, while the PC120-6 and PC130-6 utilize the S6D102E-1 engine. These excavators are designed with efficiency and durability in mind, suitable for a wide range of construction and earthmoving applications. This comprehensive manual provides essential information for the operation, maintenance, and repair of your Komatsu excavator. It includes detailed sections on engine specifications, hydrostatic transmission systems, and operational weights for each model. Furthermore, it outlines critical maintenance procedures, including engine oil types and capacities, hydraulic oil capacity, coolant capacity, and fuel tank capacity. Safety guidelines and troubleshooting tips are also covered, ensuring that owners and technicians have the resources needed to keep these machines running optimally and safely.