This service repair manual covers Yanmar TNV Series Direct Injection Engines, including models such as the 3TNV82A, 3TNV84, 3TNV84T, 3TNV88, 4TNV84, 4TNV84T, 4TNV88, 4TNV94L, 4TNV98, 4TNV98T, 4TNV106, and 4TNV106T. These diesel engines are engineered for robust performance and reliability, designed for demanding applications in industrial machinery, agricultural machinery, and construction equipment. Yanmar engines are recognized for their efficient direct injection fuel systems and liquid cooling, ensuring consistent operation across various conditions. This comprehensive English language manual provides essential information for maintaining and repairing your Yanmar engine. It details recommended service intervals, lubrication requirements, and replacement procedures for filters. Technical specifications, troubleshooting guidance, and safety precautions are also included to assist owners, mechanics, and technicians in ensuring optimal performance and longevity of their Yanmar Direct Injection Engines.