This Workshop Service Repair Manual covers the Thomas 135, 137, 153, and 1300 ProTough Skid Steer Loader models. Engineered for demanding heavy equipment applications, these machines are built for reliability and robust performance. The ProTough line represents a commitment to durable construction and efficient operation, making them a trusted choice for various service and repair tasks. This comprehensive manual provides detailed information essential for maintaining and repairing your Thomas Skid Steer Loader. It includes step-by-step instructions with visual aids, covering all repair procedures from A to Z for all models, engines, trim, and transmission types. This English-language resource is designed to assist owners, mechanics, and technicians in ensuring the optimal performance and longevity of their equipment.