This manual covers the Hyundai Thomas HSL215T and HSL240T Excavator Operating Manual. These machines are engineered for demanding operational environments, emphasizing reliability and performance. The operating manual provides comprehensive guidance to ensure safe and efficient use, promoting optimal machine health and longevity through detailed instructions and specifications. The purpose of this manual is to serve as a complete resource for owners, operators, and technicians. It details operating procedures, safety guidelines, maintenance schedules, and troubleshooting for various systems including the engine, electrical system, and undercarriage. Technical specifications, lubrication requirements, and guidance on special equipment such as hydraulic breakers are also included, all designed to promote safety and enhance machine performance.