The Hitachi Zaxis 210 H 3 is a robust construction machine engineered for demanding tasks. This model, part of the H 3 Series, features a powerful diesel engine with a displacement of approximately 5.1-5.2 liters, delivering around 110-120 kW. Its hydrostatic transmission with electronic control ensures efficient power management, while the water-cooled system maintains optimal operating temperatures. With an operating weight of approximately 20,000-22,000 kg and a bucket capacity of 0.8-1.0 m³, the Zaxis 210 H 3 is designed for reliability and performance in various construction environments. This Workshop Service Repair Manual provides comprehensive technical information for the Hitachi Zaxis 210 H 3. It covers essential maintenance procedures, including lubrication capacities for engine oil, hydraulic oil, and coolant, along with recommended service intervals for engine oil and hydraulic filters. Detailed specifications for the engine, transmission, and undercarriage are included, alongside performance data such as maximum digging depth and reach. This manual is an indispensable resource for mechanical technicians, offering guidance for proper maintenance, troubleshooting, and repair to ensure the longevity and optimal operation of the equipment.