This workshop service and repair manual covers the Yanmar TNE Series industrial diesel engines, including models such as the 2TNE68, 3TNE68, 3TNE74, 3TNE78A, 3TNE82A, 3TNE82, 3TNE84, 3TNE88, 4TNE82, 4TNE84, 4TNE88, 3TNE84T, and 4TNE84T. These diesel engines are engineered for robust performance and reliability in industrial applications. This manual provides comprehensive guidance for the service, repair, and maintenance of these essential power units. The purpose of this manual is to provide detailed information for the effective upkeep and repair of your Yanmar TNE Series engine. It includes sections on specifications, cross-sectional views, cooling, lubrication, and fuel oil systems, as well as troubleshooting guides, special service tools, measurement and adjustment procedures, and disassembly and reassembly instructions. With step-by-step instructions and detailed illustrations, this manual is an indispensable resource for owners, mechanics, and technicians.