This document is the service manual for Liebherr hydraulic excavators. It contains technical specifications and instructions for maintenance and repair. The manual is intended to assist support services and includes safety warnings. It describes the various systems of the excavator such as the engine, hydraulics, electrical systems, and more. The manual is broken down into sections for each subsystem and includes diagrams, drawings and detailed images. It is intended as guidance for support technicians and proper training is still required before conducting any repairs.