This manual covers the Hitachi Zaxis ZX220W-3 wheeled excavator, part of the W-3 Series. Engineered for demanding applications, this machine boasts a robust construction and reliable performance, featuring a powerful Cummins QSB6.7 diesel engine delivering 177 HP and 567 lb-ft of torque. Its hydrostatic 4WD transmission ensures efficient power delivery, while its substantial operating weight of 22,000 kg and impressive digging capabilities, including a maximum depth of 6690 mm and reach of 10110 mm, make it a versatile tool for construction and earthmoving tasks. This Full Service Repair Manual in English provides comprehensive guidance for the maintenance and repair of your Hitachi Zaxis ZX220W-3. It details essential procedures, technical specifications, and troubleshooting steps necessary to keep your equipment operating at peak performance. Coverage includes engine and hydraulic system maintenance, fluid capacities, component specifications, and safety guidelines, empowering owners, mechanics, and technicians to perform necessary upkeep and repairs effectively.