This Service Repair Manual covers the Komatsu SK815-5N and SK815-5NA series Skid Steer Loaders. These machines are engineered for demanding work environments, offering robust performance and reliability. Designed for a variety of applications, they are built with quality components and advanced systems to ensure efficient operation and longevity. The SK815-5N Series is applicable for serial numbers A30001 and up, while the SK815-5NA Series covers serial numbers A10001 and up. This comprehensive manual provides essential information for maintaining and repairing your Komatsu Skid Steer Loader. It includes detailed sections on general information, structure and function, maintenance standards, standard value tables, testing and adjusting, disassembly and assembly procedures, and diagrams and schematics. This resource is designed to assist owners, technicians, and mechanics in performing all necessary service operations, ensuring the optimal performance and extended service life of the equipment.