This Service Repair Workshop Manual provides comprehensive information for the Hitachi ZX210K-3 excavator, a robust piece of equipment designed for demanding construction and earthmoving applications. Engineered for reliability and performance, the ZX210K-3 series features a powerful diesel engine and a hydrostatic transmission, ensuring efficient operation and precise control. Its robust construction and advanced hydraulic system, including a Closed-center Load Sensing System (CLSS), contribute to its productivity and durability in various work environments. The operator-focused cabin, equipped with pilot-assisted controls and safety features like ROPS and FOPS compliance, enhances user experience and operational safety. This manual serves as an essential resource for owners, technicians, and mechanics responsible for the maintenance and repair of the Hitachi ZX210K-3. It covers a wide range of topics, including detailed maintenance schedules, diagnostic procedures, troubleshooting guides, and technical specifications for the engine, transmission, and hydraulic systems. By providing clear instructions and diagrams, this English-language manual empowers users to perform routine servicing, identify and resolve issues, and ensure the optimal performance and longevity of their excavator.