This manual covers the Liebherr A934C, A944C-HD, and A954C-HD Litronic Hydraulic Excavator models, with specific serial number ranges detailed for each. These excavators are engineered for demanding industrial applications, offering robust performance and reliability. Their advanced hydraulic systems and durable construction ensure efficient operation and longevity in challenging work environments. The purpose of this comprehensive service repair manual is to provide detailed, step-by-step instructions for maintenance, repair, and troubleshooting. It covers all essential systems, including general information, tools, technical data, engine, drivetrain, hydraulic and electrical systems, as well as specialized components like the swing gear, axles, steering, and braking systems. This guide is an invaluable resource for owners, mechanics, and technicians to ensure the optimal performance and extended service life of their Liebherr excavators.