This Service Parts Catalogue covers Thomas Skid Steer Loader models 135, 137, and 153. These machines are engineered for demanding work environments, featuring a robust hydrostatic drive system designed for reliability and efficient operation. Their intended use includes working on the vehicle itself, identifying necessary components, and facilitating the ordering of replacement parts to ensure minimal downtime and sustained productivity. This manual provides comprehensive information for maintaining and repairing your Thomas Skid Steer Loader. It details parts for various systems including the Fuel System, Rear Door and Latch assemblies, Quik-Tach, ROPS Assembly, Lift Arms, Control Levers, Foot Pedals, Transmission Housing, and hydraulic circuits such as the Boom Lift and Bucket Tilt. Additionally, it covers components like the Control Valve, Cylinders, Hydrostatic Pump, Electrical Wiring, Air Cleaner, Exhaust System, Cab Enclosure, and Heater, ensuring that owners, mechanics, and technicians have the resources needed for accurate parts identification and service.