This manual covers the Komatsu 108 series Diesel Engine, including models S6D108-1 and SA6D108-1. Designed for maintenance, service, diagnosis, and repair, these engines are built with Komatsu's renowned engineering quality and reliability. This comprehensive guide provides the necessary information to ensure optimal performance and longevity of your diesel engine. The purpose of this Factory Service/Repair/Workshop Manual is to empower owners, mechanics, and technicians with the knowledge to maintain, service, diagnose, and repair their engine. It details general information, structure and function, testing and adjusting procedures, disassembly and assembly, maintenance standards, and repair and replacement of parts. With step-by-step instructions and detailed diagrams, this manual serves as an indispensable resource for all service needs.