The Hitachi Zaxis ZX 210LCN-3 excavator, part of the Zaxis-3 Series, is a robust piece of equipment engineered for demanding construction and earthmoving tasks. Featuring a powerful Isuzu AI-4HK1X diesel engine with a displacement of 5.2 L and an output of 153 horsepower, it is designed for reliability and efficiency. This excavator boasts a hydrostatic transmission, a maximum digging depth of 6.63 meters, and an operating weight of 20,300 kg, making it suitable for a wide range of heavy-duty applications. Its advanced hydraulic system, with variable displacement piston pumps, ensures precise control and high performance. This Workshop Service Manual provides comprehensive guidance for the maintenance, repair, and technical understanding of the Hitachi Zaxis ZX 210LCN-3 excavator. It covers essential areas including detailed maintenance procedures for lubrication, hydraulic, coolant, and fuel systems, alongside technical specifications for engine, transmission, and dimensions. Troubleshooting information and safety guidelines are also included to assist owners, mechanics, and technicians in keeping the machine in optimal working condition. The manual is presented in English and offers extensive details across its 699 pages.