This service repair manual set covers Hitachi ZAXIS ZX 110, 110M, 120, 130, 130LCN, 125US, and 135US excavators. These machines are engineered for demanding operational environments, offering robust performance and reliability. This comprehensive documentation is designed to support the maintenance, repair, diagnosis, operation, activation, and performance testing of these excavators, ensuring they continue to operate at peak efficiency. This manual provides essential information for owners, mechanics, and technicians. It includes detailed technical manuals covering operation principles, troubleshooting procedures, and workshop manuals for maintenance and repair. With extensive content, including diagrams, schematics, and actual photo illustrations, this English-language resource facilitates a thorough understanding of the excavator's systems and components, enabling effective upkeep and problem resolution.