The Komatsu PC240LC-8 is a robust excavator designed for demanding construction and earthmoving applications. Built with Komatsu's renowned engineering for reliability and performance, this machine features a powerful Komatsu S4D102E-1 diesel engine, delivering 125 kW (168 HP) at 2000 rpm. Its hydrostatic transmission ensures efficient power delivery for travel speeds up to 5.5 km/h, while the substantial operating weight of 23,170 kg and a standard bucket capacity of 1.35 m³ highlight its capability for significant work. With a length of 9770 mm and a width over tracks of 2990 mm, the PC240LC-8 is engineered for stability and productivity in diverse environments. This comprehensive Service and Operating Manual provides essential information for maintaining and operating the Komatsu PC240LC-8 excavator. It covers critical areas including detailed maintenance procedures, lubrication capacities for the engine, hydraulic, swing, and final drive systems, and recommended service intervals for engine oil and hydraulic oil. Technical specifications for the engine, transmission, hydraulic system, and machine dimensions are included, alongside guidance for troubleshooting and safe operation. This manual is an indispensable resource for owners, operators, and technicians to ensure the longevity, efficiency, and optimal performance of their equipment.