This comprehensive service repair manual covers the Liebherr R934C, R944C, and R954C Hydraulic Excavator models, specifically those with serial numbers beginning from 18215 for the R934C, 16469 for the R944C, and 14968 for the R954C. These machines are engineered for demanding construction and industrial applications, offering robust performance and reliability. The manual provides detailed information essential for understanding and maintaining these powerful hydraulic excavators, ensuring their continued operational efficiency. The purpose of this manual is to equip owners, mechanics, and technicians with the necessary knowledge for the assembly, disassembly, servicing, and repair of the specified Liebherr excavators. It includes extensive sections on general information, tools, technical data, maintenance guidelines, engine systems, hydraulic systems and components, electrical systems, drivetrain components such as swing and travel gears, track systems, special attachments, and the cab environment. With detailed diagrams, illustrations, and step-by-step procedures, this manual facilitates accurate troubleshooting and effective maintenance, empowering users to perform repairs and upkeep with confidence.