This workshop service repair manual covers the Hitachi Zaxis 270-3 Hydraulic Excavator. Engineered for demanding applications, this excavator features a robust ISUZU AH-6HK1X direct injection, water-cooled, 4-cycle diesel engine with a displacement of 7.8 Liters, delivering 150 kW (201 HP) at 2000 rpm. Its hydrostatic transmission, coupled with variable displacement hydraulic motors, ensures efficient power transfer and precise control. With an operating weight of approximately 26,900 kg and impressive digging capabilities, including a maximum digging depth of 6,660 mm and a standard bucket capacity of 1.1 m³, the Zaxis 270-3 is built for reliability and performance in various construction and earthmoving environments. This comprehensive English-language manual provides essential information for the maintenance and repair of your Hitachi Zaxis 270-3 Hydraulic Excavator. It details critical procedures for lubrication, cooling systems, and fuel systems, including specific capacities for engine oil, hydraulic oil, coolant, and fuel. Technical specifications for the hydraulic system, attachments, and performance metrics are thoroughly outlined. This resource is designed to assist owners, mechanics, and technicians in understanding the machine's operation, performing routine maintenance, troubleshooting issues, and ensuring the longevity and optimal performance of the equipment.