This manual provides comprehensive information for the Deutz 912 and 913 series engines. These engines are known for their robust construction and reliable performance, making them suitable for a wide range of industrial and agricultural applications. This guide is designed to ensure optimal operation and longevity of your Deutz engine through detailed explanations and procedures. The scope of this manual covers essential aspects of engine ownership, including general information, detailed engine descriptions, operational guidelines, and specific maintenance schedules. It also addresses operating media, routine maintenance tasks, service procedures, and troubleshooting common faults. Technical specifications and service information are included to assist owners, mechanics, and technicians in maintaining and repairing the engine effectively.