The Komatsu PC200-6, PC200LC-6, PC220LC-6, and PC250LC-6 series excavators represent robust engineering designed for demanding work environments. These machines, likely produced from the mid-1990s to the early 2000s, are characterized by their powerful Komatsu diesel engines, such as the SAA6D102E-1, delivering substantial horsepower for efficient operation. Their hydrostatic transmission with electronic control ensures smooth power delivery and precise maneuverability, crucial for tasks requiring accuracy. With operating weights ranging from approximately 19,000 to 25,000 kg, these excavators are built for reliability and performance in construction, mining, and other heavy-duty applications. This manual provides comprehensive guidance for the operation and maintenance of the Komatsu PC200-6 series excavators. It covers essential information including routine maintenance procedures, detailed troubleshooting steps, and critical technical specifications. Owners, operators, and service technicians will find detailed instructions on engine oil and hydraulic oil capacities, filter replacement intervals, and hydraulic system parameters. The manual serves as an indispensable resource for ensuring the longevity, optimal performance, and safe operation of these powerful machines.