The Komatsu PC800LC-8 GALEO is a powerful excavator designed for demanding heavy-duty applications. Featuring a Komatsu SAA6D140E-5 engine with a gross power of 367 kW (492 HP) and a displacement of 15.24 L, this machine is built for exceptional performance and reliability. Its robust construction, hydrostatic transmission, and impressive operating weight of 78,300 kg make it ideal for large-scale construction, mining, and earthmoving projects. The PC800LC-8 is engineered to meet EPA Tier 3 and EU Stage IIIA emission standards, reflecting a commitment to both power and environmental responsibility. This Service Manual and Field Assembly Instruction provides comprehensive guidance for the Komatsu PC800LC-8 GALEO, covering serial numbers 50001 and up. It details essential maintenance procedures, including fluid capacities and lubrication intervals, along with troubleshooting steps to address potential issues. Technical specifications for the engine, transmission, hydraulic system, and dimensions are thoroughly outlined, offering critical data for diagnostics and repair. Safety guidelines are also included to ensure the proper and secure operation of the equipment. This manual serves as an indispensable resource for owners, mechanics, and technicians to maintain the optimal performance and longevity of their Komatsu excavator.