This comprehensive service manual covers the Deutz BFM 1012 and BFM 1013 series engines, including various configurations such as BF4M 1012, BF4M 1013, BF6M 1012, and BF6M 1013 models, as well as their 'E' variants. Designed for a wide range of applications, these engines are known for their robust engineering and reliability. This manual provides the detailed information necessary to understand, maintain, and repair these power units, ensuring optimal performance and longevity for any user. The purpose of this manual is to serve as the definitive guide for all service and repair operations on the Deutz BFM 1012 and 1013 engines. It contains extensive information on engine identification, general precautions, disassembly and assembly procedures, maintenance schedules, and troubleshooting. Detailed sections cover critical systems including the engine body, fuel system, cooling system, exhaust system, and electrical components, along with specific servicing specifications and tightening torques. This resource is invaluable for both do-it-yourself enthusiasts and professional mechanics seeking to maintain their engines effectively.