The Hitachi Zaxis ZX220W-3 is a robust Hydraulic Excavator from the Zaxis-3 Series, engineered for demanding construction and earthmoving applications. This model features a powerful Isuzu AH-4HK1X turbocharged diesel engine, delivering 118 kW (158 hp) and meeting EPA Tier 3 / EU Stage III A emissions standards. Its hydrostatic 4-wheel drive transmission provides efficient power and control, with travel speeds up to 7.0 km/h. With an operating weight ranging from 21,900 to 23,500 kg and a maximum bucket capacity of 1.0 m³, the ZX220W-3 is designed for reliability and performance in challenging environments. This Workshop Service Repair Manual provides comprehensive guidance for the Hitachi Zaxis ZX220W-3 Hydraulic Excavator. It covers essential maintenance procedures, including fluid capacities for engine oil, hydraulic oil, and coolant, alongside detailed technical specifications for the engine, transmission, and performance capabilities such as digging depth and reach. The manual is an indispensable resource for owners, mechanics, and technicians, offering the necessary information to ensure optimal operation, effective troubleshooting, and proper repair, thereby maintaining the longevity and efficiency of the equipment.