This manual provides comprehensive technical information for the Liebherr A 900 C, A 904 C, A 914 C, and A 924 C Litronic EDC Hydraulic Excavator models, covering serial numbers starting from 24677 for the A 900 C, 30580 for the A 904 C, 35112 for the A 914 C, and 34519 for the A 924 C and A 924 C HD. These excavators are engineered for demanding operational environments, reflecting Liebherr's commitment to robust construction and reliable performance in heavy-duty applications. The purpose of this service manual is to serve as an essential aid for improving repair quality by ensuring a thorough understanding of the product and outlining correct repair procedures. It covers a wide range of topics including general information, tools, technical data, maintenance guidelines, engine, drivetrain, hydraulic and electrical systems, braking, steering, and climate control. This manual is designed to assist owners, mechanics, and technicians in maintaining and repairing these hydraulic excavators effectively.