This manual covers the Komatsu SK815-5N and SK815-5NA Skid Steer Loaders, designed for maintaining, assembly, disassembly, servicing, and operation. These machines are engineered for reliability and efficiency in demanding work environments. The comprehensive documentation ensures users can maximize the performance and longevity of their equipment. This Service Repair Manual and Operation & Maintenance Manual provides detailed guidance for all aspects of the Komatsu SK815-5N/SK815-5NA Skid Steer Loaders. It includes essential information on structure and function, testing and adjusting, disassembly and assembly, maintenance standards, safety, operation, and technical specifications. With clear diagrams, schemes, and real photo illustrations, this manual is an indispensable resource for owners, mechanics, and technicians to ensure safe, economical, and peak operational performance.