This manual covers the Liebherr R 934 B Litronic excavator, a powerful tunneling excavator designed for demanding operational environments. Built with Liebherr's renowned engineering quality, this machine is engineered for reliability and efficiency. Its advanced Litronic system offers precise control, enhancing productivity and operator performance across a range of construction and excavation tasks. This operating manual is essential for anyone involved with the machine's use and upkeep. The purpose of this manual is to provide comprehensive guidance for machine operators and maintenance personnel. It details product descriptions, safety guidelines, control and operation procedures, troubleshooting for malfunctions, and essential maintenance tasks. By carefully reading and adhering to the instructions within, operators can familiarize themselves with the machine, prevent operational errors, and ensure optimal performance. Maintenance personnel will find detailed information to increase the machine's reliability, extend its service life, and reduce repair costs and downtime.