This manual covers the YANMAR 4TNE94, 4TNE98, and 4TNE106T Industrial Diesel Engines. These inline 4-cylinder diesel engines are engineered for robust performance and reliability in demanding industrial applications. The models feature varying displacements, with the 4TNE106T incorporating turbocharging for enhanced power output. Their design prioritizes durability and efficiency, making them suitable for a wide range of heavy-duty equipment. This Service Repair Manual provides comprehensive guidance for the maintenance and repair of these YANMAR engines. It includes detailed procedures for scheduled maintenance, inspections, adjustments, and overhauls of major engine components such as the cylinder head, gear train, and cylinder block. The manual also covers fuel system, electrical system, cooling system, lubrication system, and turbocharger service. Troubleshooting guides, special tool information, and general service precautions are also included to assist owners, mechanics, and technicians in ensuring optimal engine performance and longevity.