This manual covers the Komatsu SK1020-5NA and SK1020-5N series compact equipment, designed for robust performance in various operational environments. These machines are engineered with a focus on reliability and efficiency, featuring a diesel engine and a hydrostatic transmission with all-wheel drive for superior traction and control. The 5NA/5N Series is built to handle demanding tasks, embodying Komatsu's commitment to quality and durability in its product line. The purpose of this Operation & Maintenance Manual is to provide comprehensive guidance for the safe and effective use, servicing, and repair of the Komatsu SK1020-5NA and SK1020-5N. It details essential information including safety precautions, operational procedures, troubleshooting techniques, and detailed maintenance schedules. This manual is an indispensable resource for owners, operators, and technicians, ensuring the longevity and optimal performance of the equipment.