This service repair workshop manual covers the Case David Brown AD4-47, a robust four-cylinder diesel engine. This engine, featuring direct injection and water cooling, delivers 47 horsepower from its 2376cc displacement. Its engineering is designed for reliability and efficient operation in demanding applications. This manual provides comprehensive guidance for the maintenance and repair of the AD4-47 engine. It details essential procedures, technical specifications, and troubleshooting information necessary for owners, mechanics, and technicians. By following the instructions within this document, users can ensure the optimal performance and longevity of their Case David Brown engine.