This manual covers the Liebherr A904 C LITRONIC and A 904 C HD LITRONIC machines, designed for demanding industrial applications. Built with Liebherr's renowned engineering quality, these machines are engineered for reliability and efficiency. This comprehensive guide is intended for both machine operators and maintenance personnel, ensuring proper understanding and operation from initial setup through to routine care and service. The purpose of this manual is to provide all necessary information for the safe and effective control, operation, and maintenance of your Liebherr machine. It details product descriptions, essential safety guidelines, operational procedures, troubleshooting common malfunctions, and scheduled maintenance. By carefully reading and adhering to the instructions within, operators can familiarize themselves with the machine, prevent operational errors, and ensure optimal performance, while maintenance personnel can enhance reliability, extend service life, and reduce repair costs and downtime.