The Hitachi Zaxis ZX220W-3 is a robust Hydraulic Excavator engineered for demanding work environments. Powered by an Isuzu AA-6BG1T turbocharged diesel engine, it delivers a net power of 120 kW (161 hp) and features a hydrostatic 4WD transmission for optimal traction and control. With an operating weight of 21,900 kg and impressive hydraulic performance, including a maximum digging depth of 6.7 meters and a bucket capacity of 0.9 m³, this machine is built for efficiency and reliability in various construction and excavation applications. This Factory Service Repair Manual provides comprehensive guidance for the Hitachi Zaxis ZX220W-3 Hydraulic Excavator. It covers essential maintenance procedures, detailed troubleshooting steps, and critical technical specifications necessary for proper upkeep and repair. The manual is designed to assist owners, mechanics, and technicians in understanding the machine's systems, ensuring its longevity, and maintaining peak operational performance. All information is presented in English for clarity and ease of use.