The Hitachi ZX50U-3 is a versatile compact excavator designed for a wide range of construction and landscaping applications. Built with robust engineering, this machine exemplifies Hitachi's commitment to reliability and performance. Its compact size, approximately 1960 mm wide and 4990 kg operating weight, allows for efficient operation in confined spaces, while its powerful diesel engine, likely an Isuzu 4JG1-T, delivers approximately 47.4 HP and 115 lb-ft of torque. The hydrostatic 4WD drivetrain ensures excellent maneuverability and power delivery, making it suitable for demanding tasks. This Workshop Service Repair Manual in English provides comprehensive guidance for the maintenance and repair of the Hitachi ZX50U-3. It covers essential areas including detailed engine specifications, transmission systems, hydraulic capacities, and performance metrics such as digging depth and reach. The manual also includes critical safety information, such as details on the ROPS compliant operator station. By following the procedures outlined within, owners, mechanics, and technicians can ensure the longevity, optimal performance, and safe operation of their equipment.