The Hyundai Thomas HSL600T and 680T Skid Steer Loaders represent robust and reliable machinery designed for demanding operational environments. Engineered for efficiency and durability, these loaders are built to tackle a wide range of tasks in construction, landscaping, and material handling. Their design emphasizes operator control and operational versatility, making them a valuable asset for any professional requiring dependable performance. This Workshop Service Repair Manual provides comprehensive guidance for the maintenance, repair, and troubleshooting of the Hyundai Thomas HSL600T and 680T Skid Steer Loaders. It covers essential systems including the hydraulic system, hydrostatic drive system, final drive, controls, electrical components, main frame, and engine. Detailed maintenance procedures, technical specifications, and diagnostic information are included to assist owners, technicians, and mechanics in ensuring optimal performance and longevity of the equipment.