This manual pertains to the Deutz Engine BF4M 1012, a robust engine designed for demanding applications. Its engineering emphasizes reliability and efficiency, making it a trusted component in various industrial and commercial settings. The BF4M 1012 is recognized for its durable construction and consistent performance, ensuring operational continuity where it matters most. This comprehensive service repair workshop manual provides detailed instructions for maintenance, troubleshooting, and repair of the Deutz Engine BF4M 1012. It covers essential areas including engine identification, general precautions, maintenance checklists, specific checks and maintenance procedures, special tools, engine body, fuel system, cooling system, electrical system, and troubleshooting. With step-by-step instructions, diagrams, illustrations, wiring schematics, and specifications, this manual is an indispensable resource for owners, mechanics, and technicians seeking to maintain and repair the engine effectively.