This manual covers the Deutz Engine FL 912, B/FL 913/C, and F3 - 6L 912, F3/4/6L 913, BF4/6L 913, BF6L 913C models. It is designed to provide comprehensive guidance for servicing and repairing these engines, reflecting the engineering quality and reliability expected from Deutz. This resource is invaluable for anyone seeking to understand and maintain their equipment. The scope of this workshop service repair manual is extensive, detailing technical specifications, component repair, disassembly and reassembly procedures for the complete engine, and necessary tools. It is presented in multiple languages, including English, German, French, and Spanish, ensuring accessibility for a wide range of users. This manual serves as an essential guide for owners, mechanics, and technicians to effectively maintain and repair their Deutz engines.