This manual covers the Deutz 912 and 913 engine series. These engines are known for their robust engineering and reliability, designed for demanding applications where consistent performance is critical. Their construction emphasizes durability and efficiency, making them a trusted choice for various industrial and commercial uses. This comprehensive guide is intended to support owners and operators in understanding and maintaining these powerful engines. The purpose of this service manual is to provide detailed instructions for the maintenance, repair, and troubleshooting of the Deutz 912 and 913 engines. It includes step-by-step procedures, accompanied by illustrations and diagrams, covering all aspects of service and repair, from routine maintenance to in-depth component overhauls. This resource is designed to empower users to perform necessary work efficiently, ensuring the longevity and optimal performance of their engines.