This manual covers the Liebherr R904 C Excavator, with serial numbers beginning from 23073. Designed for demanding operational environments, the R904 C exemplifies Liebherr's commitment to robust engineering and reliable performance. Its advanced design ensures efficiency and durability, making it a valuable asset for a wide range of construction and industrial applications. Familiarizing yourself with its capabilities and proper operation is key to maximizing its potential. This comprehensive operating manual provides essential information for both machine operators and maintenance personnel. It details product descriptions, safety guidelines, control and operation procedures, troubleshooting guidance, and maintenance schedules. By carefully studying and adhering to the instructions within, users can ensure safe operation, prevent malfunctions, enhance reliability, extend the service life of the machine, and minimize repair costs and downtime.