The Yanmar 3TNM68 and 3TNM72 are industrial engines designed for robust performance in demanding applications. These 3-cylinder, vertical, water-cooled, 4-cycle diesel engines are engineered for reliability and efficiency. With features such as indirect fuel injection and a forced lubrication system, they are built to deliver consistent power and longevity in various industrial settings. Their compact design and proven engineering make them a dependable choice for a wide range of equipment. This comprehensive manual serves as an essential guide for the operation, maintenance, and repair of your Yanmar 3TNM68 or 3TNM72 industrial engine. It provides detailed information on technical specifications, recommended service intervals, and operational parameters. Owners, technicians, and mechanics will find step-by-step procedures for maintenance tasks, troubleshooting guidance for common issues, and critical safety information to ensure the optimal performance and longevity of the engine.