This Parts Catalog covers the Thomas T-133 and T-103 Skid Steer Loaders. These machines are engineered for demanding applications in material handling, construction, and landscaping, offering robust performance and reliability. The T-133 models are identified by serial numbers LE000537 through LE002183, while the T-103 models fall within the serial number range LC000210 through LC000485. This comprehensive English-language manual provides detailed parts information, including complete disassembly instructions for the main frame, controls, final drive and transmission, hydraulic system, hydrostatic drive system, electrical system, engine equipment, and optional equipment. A numerical index is also included to facilitate easy part identification. This resource is designed to assist owners, mechanics, and technicians in accurately identifying and ordering replacement parts, ensuring the continued optimal operation and maintenance of their Thomas Skid Steer Loaders.