The Hitachi ZAXIS ZX120 is a robust crawler excavator engineered for demanding construction and earthmoving applications. This versatile machine is designed for optimal performance, offering a powerful hydrostatic transmission and a reliable diesel engine. Its construction emphasizes durability and efficiency, making it a dependable choice for a wide range of operational needs. The ZAXIS ZX120 is built to deliver consistent productivity and operational excellence in various work environments. This Service Repair Manual provides comprehensive guidance for the Hitachi ZAXIS ZX120. It covers essential maintenance procedures, detailed troubleshooting steps, and critical technical specifications necessary for proper upkeep and repair. The manual is intended to assist owners, technicians, and mechanics in ensuring the longevity and optimal functioning of the excavator. By following the information contained within, users can effectively maintain the machine, diagnose issues, and perform necessary repairs to keep the ZAXIS ZX120 operating at peak performance.