The Hitachi Zaxis 270-3, produced between 2005 and 2010, represents a robust and reliable excavator engineered for demanding construction and earthmoving applications. This model, part of the Zaxis-3 Series, features a powerful Isuzu AA-6HK1XQT diesel engine with a displacement of 7.8 L, delivering 148 kW (198 hp) at 2000 rpm, and meets EPA Tier 3 / EU Stage IIIA emission standards. Its hydrostatic transmission and tracked drive system provide excellent maneuverability and stability, with an operating weight of 26,400 kg. Notable features include a ROPS/FOPS certified cab with standard air conditioning, a maximum digging depth of 6,760 mm, and a bucket capacity ranging from 1.3 to 1.7 m³, making it a versatile tool for various job sites. This Workshop Service Manual (WSM) provides comprehensive technical information in English for the Hitachi Zaxis 270-3. It is designed to assist owners, mechanics, and technicians in performing maintenance, repairs, and diagnostics. Key areas covered include detailed engine specifications, transmission and drive system information, hydraulic system performance data, and maintenance schedules, such as the 500-hour engine oil change interval. The manual also outlines fluid capacities for the engine oil, hydraulic tank, and fuel tank, alongside safety guidelines and features. Its professional quality ensures accurate and effective upkeep of the equipment.