This manual covers the Komatsu S6D108-2, SA6D108-2, and SAA6D108-2 diesel engines, part of the 108-2 Series. These engines are engineered for robust performance and reliability, suitable for a wide range of industrial applications requiring dependable power. The design emphasizes durability and efficiency, making them a trusted choice for demanding operational environments. This comprehensive shop manual provides essential information for the repair and overhaul of these Komatsu diesel engines. It includes detailed step-by-step instructions, explanations of component and system functions, and all necessary specifications and tolerances for disassembly and assembly. With top-quality diagrams, pictures, illustrations, and easy-to-read text, this manual is an indispensable resource for owners, mechanics, and technicians to ensure optimal engine maintenance and longevity.