The Hitachi Zaxis-3 Series Zaxis 210H-3 is a robust construction machine engineered for demanding tasks. Powered by a Cummins QSB6.7 diesel engine, it delivers a gross power of 122 kW (164 hp) and features a hydrostatic swing and travel drive system for efficient operation. With an operating weight of approximately 21,000 - 22,000 kg, an overall length of 9.51 m, and a maximum digging depth of 6.68 m, this excavator is designed for significant earthmoving capabilities. Its construction emphasizes reliability and performance, making it a valuable asset in various construction and excavation projects. This comprehensive Service Repair Workshop Manual provides essential information for the maintenance and repair of the Hitachi Zaxis 210H-3. It covers critical areas including detailed technical specifications, engine diagnostics, hydraulic system maintenance, and operational procedures. The manual is intended to assist owners, technicians, and mechanics in understanding the machine's components, performing routine servicing, and troubleshooting potential issues. By following the guidelines within this manual, users can ensure the optimal performance, longevity, and safety of their equipment.