The Komatsu SK1020-5N and SK1020-5NA series represent robust and reliable compact equipment designed for a variety of demanding tasks. These models, covering serial numbers A70001 and up for the SK1020-5N and A60001 and up for the SK1020-5NA, are engineered for efficiency and durability in construction, landscaping, and material handling applications. Their hydrostatic transmission and skid-steer four-wheel-drive system provide excellent maneuverability and power, making them versatile tools for any job site. This Service Repair Manual provides comprehensive guidance for the maintenance and repair of your Komatsu SK1020-5N and SK1020-5NA equipment. It covers essential topics including general information, structure and function, maintenance standards, testing and adjusting procedures, troubleshooting, and disassembly and assembly. Detailed diagrams and schematics are included to aid in understanding complex systems. This manual is an indispensable resource for owners, mechanics, and technicians seeking to ensure the optimal performance and longevity of their machinery.