This manual covers the HITACHI EX120-2 EXCAVATOR, specifically for serial numbers 30001 and up. Designed for demanding operational environments, this excavator is built with robust engineering to ensure reliability and efficiency in various construction and industrial applications. Its advanced features contribute to superior performance, making it a dependable choice for professionals seeking quality and durability in heavy machinery. The purpose of this manual is to provide comprehensive information essential for the operation, maintenance, and repair of your HITACHI EX120-2 EXCAVATOR. It details critical procedures, technical specifications, and troubleshooting guidance, enabling owners, mechanics, and technicians to effectively manage and service the equipment. By following the instructions within this guide, users can ensure optimal performance, longevity, and safety of the excavator.