The Komatsu PC220-5 and PC220LC-5 are robust hydraulic excavators designed for demanding construction and earthmoving applications. These machines are powered by the Komatsu S6D102E-1 diesel engine, a water-cooled, 4-cycle unit with a displacement of 5.883 L, delivering a net power of 114 kW (153 HP) at 2000 rpm. With an operating weight of approximately 22,000 kg for the PC220-5 and 22,600 kg for the PC220LC-5, these excavators offer substantial power and stability for various tasks. Their engineering emphasizes reliability and efficiency, making them a dependable choice for contractors and operators requiring high performance in challenging environments. This Workshop Service Manual provides comprehensive guidance for the maintenance and repair of the Komatsu PC220-5 and PC220LC-5 excavators, covering serial numbers 35001 and up. It details essential technical specifications, including engine data, transmission capabilities, and physical dimensions. The manual also outlines crucial maintenance procedures, such as fluid capacities and recommended service intervals for engine oil and hydraulic filters. By offering detailed instructions and technical information, this manual serves as an indispensable resource for owners, mechanics, and technicians to ensure the optimal performance, longevity, and safe operation of these powerful machines.