This manual provides comprehensive service and repair information for the Deutz 912 and 913 engines. Designed for both do-it-yourself enthusiasts and experienced mechanics, it details every aspect of engine maintenance and repair. The Deutz 912 and 913 engines are known for their robust construction and reliable performance, making them a popular choice for various applications. This guide ensures that owners can maintain their engines efficiently, preserving their longevity and operational effectiveness. The scope of this manual is extensive, covering engine identification, general precautions, disassembly and assembly procedures, maintenance checklists, and detailed servicing specifications. It includes in-depth instructions for the engine body, fuel system, cooling system, exhaust system, and electrical components such as the alternator and regulator, complete with wiring diagrams. Troubleshooting guides and information on special tools are also provided, enabling users to diagnose and resolve issues effectively. This resource is invaluable for anyone seeking to perform maintenance, repairs, or gain a deeper understanding of their Deutz 912 or 913 engine.