This manual covers the Komatsu 108 Series Diesel Engine, a robust and reliable power unit designed for demanding applications. Engineered for exceptional performance and longevity, the 108 Series embodies Komatsu's commitment to quality and innovation in diesel engine technology. Its advanced design ensures efficient operation and durability, making it a preferred choice for various industrial and commercial uses where dependable power is paramount. The purpose of this comprehensive Service Repair Manual is to provide detailed guidance for the repair, servicing, technical maintenance, and troubleshooting of the Komatsu 108 Series Diesel Engine. It includes step-by-step instructions for all operational procedures, covering essential maintenance areas such as the intake and exhaust systems, engine body, lubrication system, cooling system, and fuel system. With clear, easy-to-follow instructions, actual photo illustrations, schemes, and diagrams, this manual is an indispensable resource for owners, mechanics, and technicians seeking to maintain the optimal performance and extend the service life of their engine.