This workshop service repair manual covers the Yanmar 3TNV84, 3TNV84T, and 3TNV88 internal combustion diesel engines. These liquid-cooled, direct injection engines are designed for robust performance and reliability. The 3TNV series features a 3-cylinder configuration, with aspiration options including naturally aspirated for the 3TNV84 and 3TNV88, and turbocharged for the 3TNV84T. These engines are engineered for demanding applications where consistent power and durability are essential.

This comprehensive manual provides essential information for the service, maintenance, and troubleshooting of your Yanmar engine. It includes detailed maintenance procedures, a troubleshooting guide, and technical specifications. Owners, mechanics, and technicians will find the information necessary to perform routine service, address operational issues, and ensure the optimal performance and longevity of their Yanmar 3TNV series engines. Refer to the specific sections within this manual for detailed service schedules, oil recommendations, and capacities.