The Hitachi ZAXIS ZX210K-3 is a robust Crawler Excavator from the K-3 generation, engineered for demanding construction and earthmoving applications. This model features a powerful 6.7-liter Cummins QSB6.7 diesel engine producing approximately 168 HP, coupled with a hydrostatic transmission offering a two-speed travel system for optimal performance. Its substantial operating weight, ranging from 21,000 to 22,000 kg, and impressive digging capabilities, including a maximum depth of approximately 6.6 meters and a reach of around 10 meters at ground level, underscore its suitability for heavy-duty tasks. The ZAXIS ZX210K-3 is designed with reliability and efficiency in mind, making it a valuable asset on any job site. This Service Repair Manual provides comprehensive guidance for the Hitachi ZAXIS ZX210K-3 Crawler Excavator. It covers essential maintenance procedures, including recommended intervals and capacities for engine oil, hydraulic oil, and coolant, alongside detailed technical specifications for the engine, transmission, and operational performance. The manual also includes information on troubleshooting common issues and safety guidelines to ensure proper operation and longevity of the equipment. This resource is intended for owners, mechanics, and technicians, offering the necessary information to maintain, service, and repair the excavator effectively.