This workshop service repair manual covers the Hitachi Zaxis 50U-2 excavator, a robust piece of equipment designed for demanding operational environments. Engineered for reliability and efficiency, this excavator features a powerful diesel engine and a hydrostatic 4WD transmission system, making it suitable for a wide range of construction and earthmoving tasks. Its substantial operating weight of approximately 5,000 kg ensures stability and performance across various job sites. This comprehensive manual provides essential information for maintaining and repairing the Hitachi Zaxis 50U-2. It details critical maintenance procedures, troubleshooting guides, and technical specifications necessary for optimal performance and longevity. Covering aspects from engine and hydraulic systems to the undercarriage, this document is an indispensable resource for owners, technicians, and mechanics seeking to ensure the continued operational readiness and efficiency of their equipment.