This service manual covers the Hitachi Excavator Zaxis series, specifically models 200, 225USR, 225US, 230, and 270. These excavators are engineered for demanding construction and industrial applications, offering robust performance and reliability. Their design emphasizes operational efficiency and durability, making them a trusted choice for professionals in various heavy-duty environments. This manual is prepared primarily for professional use, ensuring that users have access to comprehensive information for these advanced machines. The purpose of this manual is to provide detailed guidance for the maintenance, repair, and servicing of the Hitachi Zaxis excavators. It includes essential information on technical specifications, diagnostic procedures, troubleshooting techniques, and recommended maintenance schedules. By following the instructions and guidelines within this document, owners, technicians, and mechanics can effectively maintain the optimal performance and longevity of their equipment, ensuring safe and efficient operation throughout its service life.