The Hitachi Zaxis 270-3 is a hydraulic excavator engineered for robust performance and reliability. This third-generation model is equipped with an Isuzu AH-6HK1X direct injection, water-cooled, 4-cycle diesel engine, displacing 7.8 liters and producing up to 151 kW (203 HP) of gross power. Its hydrostatic transmission with variable displacement axial piston drive motors ensures efficient power delivery for demanding tasks. With an operating weight of approximately 26,700 kg and a standard bucket capacity of 1.05 m³, the Zaxis 270-3 is designed for a wide range of construction and earthmoving applications, offering a maximum dig depth of 6.61 meters and a maximum reach of 9.91 meters. This Factory Service Repair Manual provides comprehensive guidance for the Hitachi Zaxis 270-3 hydraulic excavator. It covers essential maintenance procedures, including detailed information on fluid capacities and recommended service intervals for engine oil and hydraulic oil filters. The manual also delves into technical specifications, operational dimensions, and performance data, such as swing speed and digging capabilities. By offering in-depth troubleshooting guidance and repair instructions, this manual serves as an indispensable resource for owners, mechanics, and technicians to ensure the optimal performance, longevity, and safe operation of the Zaxis 270-3.