This manual covers the HITACHI HYDRAULIC EXCAVATOR ZAXIS ZX 210 LCK 5G. Designed for demanding operational environments, this hydraulic excavator represents a significant advancement in heavy machinery. Its engineering prioritizes robust performance, reliability, and efficiency, making it a suitable choice for a wide range of construction and earthmoving applications. The ZAXIS series is known for its advanced technology and operator-focused design, ensuring productivity and durability. The purpose of this comprehensive service technical manual is to provide detailed information for the maintenance and repair of the HITACHI HYDRAULIC EXCAVATOR ZAXIS ZX 210 LCK 5G. It includes essential data on general information, fuel system, chassis, cooling system, engine components and lubrication, clutch, drive, transmission, wheels, final drive, brakes, suspension, steering, frame, and the electrical system, including wiring diagrams. This manual is an invaluable resource for technicians and mechanics seeking to understand, maintain, and repair the equipment to factory specifications.