This manual provides comprehensive information for the Deutz 912 and 913 series of engines, specifically covering models F3L 912, F3/4/6L 913, BF4/6L 913, and BF6L 913C. These engines are recognized for their robust construction and reliable performance, making them suitable for a wide range of industrial and agricultural applications. The engineering behind the Deutz 912 and 913 series emphasizes durability and efficiency, ensuring consistent operation under demanding conditions. The purpose of this factory service manual is to equip owners, technicians, and mechanics with the necessary knowledge to maintain and repair these engines effectively. It details essential maintenance procedures, diagnostic troubleshooting steps, and provides critical technical specifications. By adhering to the guidelines within this manual, users can ensure the longevity and optimal performance of their Deutz engines, minimizing downtime and operational costs.