This Service Repair Workshop Manual covers the Hitachi Zaxis series of excavators, including models 200, 225US, 225USR, 230, and 270. These diesel-powered excavators are engineered for demanding construction and earthmoving applications, featuring robust construction and reliable performance. Their design emphasizes operational efficiency and durability, making them a valuable asset for a wide range of professional tasks. This manual provides comprehensive guidance for the maintenance, repair, and technical understanding of your Hitachi Zaxis excavator. It details essential procedures such as oil changes, filter replacements, and greasing, alongside in-depth troubleshooting and component repair instructions. Technical specifications, safety guidelines, and operational data are also included, ensuring that owners, mechanics, and technicians have the necessary information to maintain the vehicle's optimal performance and longevity.