The Hitachi ZAXIS ZX135UR is a robust Crawler Excavator engineered for demanding construction and earthmoving applications. This model, powered by a diesel engine likely manufactured by Hino, delivers approximately 105 gross horsepower and features a displacement of about 5.1 liters. Its hydrostatic transmission with a two-speed travel system ensures efficient operation and maneuverability on various job sites. With an operating weight ranging from approximately 13,500 to 14,500 kg, the ZAXIS ZX135UR is designed for stability and performance, offering impressive digging depths of up to approximately 6,200 mm and a maximum reach of around 8,500 mm, depending on arm configuration. This Service Repair Manual provides comprehensive guidance for the maintenance and repair of the Hitachi ZAXIS ZX135UR. It covers essential procedures, technical specifications, and troubleshooting information necessary to keep the excavator operating at peak performance. The manual is intended for owners, mechanics, and technicians, offering detailed instructions to ensure proper upkeep and efficient problem resolution. By following the procedures outlined within, users can maintain the reliability and longevity of their equipment.