This service shop repair manual covers the Komatsu SK1020-5N and SK1020-5NA Skid Steer Loaders. These machines are engineered for demanding operational environments, offering robust performance and reliability. The manual provides comprehensive information for maintaining these units, ensuring their continued efficiency and longevity in various applications. This English-language manual is designed to be an essential resource for owners, technicians, and mechanics. It details critical maintenance procedures, troubleshooting guides, technical specifications, and assembly/disassembly instructions, supported by real photo illustrations, diagrams, and schemes. The content is organized into key sections including General, Structure and Function, Testing/Adjusting/Troubleshooting, Disassembly and Assembly, and Other, offering step-by-step operations for ease of use.