This manual covers the Komatsu 108 series Diesel Engine, designed for maintenance, assembly, disassembly, and servicing. Engineered for reliability, these diesel engines, including the S6D108-1 and SA6D108-1 models, represent Komatsu's commitment to quality in demanding operational environments. This factory service repair manual provides comprehensive information to ensure optimal performance and longevity. The purpose of this English-language manual is to guide owners, mechanics, and technicians through all aspects of engine care. It details structure and function, testing and adjusting procedures, disassembly and assembly processes, maintenance standards, and the repair or replacement of parts. With printable pages, this manual is an essential resource for maintaining and servicing your Komatsu diesel engine effectively.