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 and provides maintenance guidelines for components like the engine, hydraulics, electrical systems, and more. Symbols are used throughout to identify safety hazards and notes. The manual is intended to help users properly service and maintain Liebherr excavators.