This manual covers the Thomas T183HD and T233HD Skid Steer Loaders, robust pieces of heavy equipment designed for demanding tasks. These machines are engineered for reliability and efficiency in various applications, making them a valuable asset for any operation requiring powerful and versatile material handling. Their construction emphasizes durability, ensuring consistent performance across a wide range of working conditions. The purpose of this comprehensive Service Repair Manual is to provide detailed guidance for the maintenance, repair, rebuilding, refurbishment, and restoration of your Thomas Skid Steer Loader. It includes step-by-step instructions, hundreds of photos and illustrations, and covers essential sections such as general information, periodic maintenance, engine, fuel system, cooling system, electrical system, chassis, and emission control. This manual is an indispensable resource for both do-it-yourself owners and experienced mechanics seeking to ensure their equipment remains in optimal working condition.