The Hitachi Zaxis ZX 210H-3 is a robust excavator engineered for demanding work environments. Featuring a powerful Isuzu 4HK1X engine, this machine delivers 151 net horsepower and a displacement of 5.2 liters, making it suitable for a wide range of excavation tasks. Its hydrostatic transmission with electronically controlled powertrain ensures efficient operation, while its substantial operating weight of 20,700 kg provides stability and capability. With a maximum digging depth of 6730 mm and a standard bucket capacity of 1.03 m³, the Zaxis ZX 210H-3 is designed for productivity and reliability in construction and earthmoving applications. This workshop service manual provides comprehensive guidance for the Hitachi Zaxis ZX 210H-3. Spanning 699 pages, it covers essential maintenance procedures, detailed troubleshooting steps, critical technical specifications, and vital safety information. The manual is an indispensable resource for owners, mechanics, and technicians, offering the knowledge required to maintain the vehicle's optimal performance, ensure its longevity, and carry out effective repairs. It details fluid capacities, service intervals, and system specifications, empowering users to manage the machine's upkeep and operational integrity.