The Hitachi Zaxis 270-3 is a robust hydraulic excavator from the Zaxis 3 Series, engineered for demanding construction and earthmoving applications. This model features a powerful Isuzu AH-6HK1X turbocharged diesel engine, delivering 194 net horsepower and 766 Nm of peak torque, coupled with a hydrostatic two-speed transmission for efficient power delivery. Its substantial operating weight of 25,500 kg, impressive digging depth of 6.62 meters, and a standard bucket capacity of 1.18 m³ underscore its capability in various heavy-duty tasks. The Zaxis 270-3 is built for reliability and performance in challenging environments. This Workshop Service Manual provides comprehensive technical information for the Hitachi Zaxis 270-3 hydraulic excavator. It covers essential maintenance procedures, including fluid capacities and filter replacement intervals for engine oil, hydraulic oil, and fuel filters, along with detailed troubleshooting guides. Technical specifications for engine, transmission, and hydraulic systems are thoroughly documented, alongside critical safety guidelines. This manual is an indispensable resource for owners, mechanics, and technicians seeking to ensure the optimal performance, longevity, and safe operation of their Zaxis 270-3 equipment.