The document is a service manual for Liebherr hydraulic excavators. It contains 18 sections that provide technical data, design descriptions, and service/setup instructions for the machines. The manual is intended to assist customer support but does not replace proper training. It includes symbols to identify dangers, requirements, and expected results. The sections cover general information, tools, technical specifications, the engine/motor, couplings, hydraulic and electrical systems, swing/travel components, and options like the cab.