This Service Repair Manual covers the Yanmar 3TNM68 and 3TNM72 industrial engines. These 3-cylinder diesel engines are designed for a variety of industrial applications and feature direct injection combustion, liquid cooling, and a naturally aspirated aspiration system. Built with robust cast iron cylinder blocks and aluminum alloy cylinder heads, these engines are engineered for reliability and performance in demanding environments. The manual provides comprehensive information for these internal combustion engines.

This manual serves as a complete guide for maintaining and repairing your Yanmar industrial engine. It includes detailed procedures for routine maintenance, troubleshooting common issues, and technical specifications essential for proper operation. By following the instructions and guidelines within this English language manual, owners, mechanics, and technicians can ensure the optimal performance, longevity, and safety of their 3TNM68 and 3TNM72 engines.