This document pertains to the Thomas T-103/T-133 Skid Steer Loader, a robust piece of equipment designed for demanding operational environments. The Thomas brand is recognized for its engineering quality and reliability, ensuring that these loaders are built to perform consistently under challenging conditions. While specific production years are not detailed, the T-103/T-133 models are equipped with a hydrostatic drive system, contributing to their operational efficiency and maneuverability. This manual serves as a comprehensive guide for owners and operators seeking to understand and maintain their equipment. This Workshop Service Repair Manual, presented in English, provides extensive coverage for the Thomas T-103/T-133 Skid Steer Loader. It details critical systems including the hydraulic system, hydrostatic drive system, final drive, controls, electrical system, and main frame, with dedicated sections for each. Furthermore, the manual includes essential information on engine maintenance and general specifications, as well as a service interval schedule and fluid capacity details. With high-quality diagrams and full printability, this manual is an indispensable resource for Do-It-Yourself enthusiasts and professional technicians alike, offering the necessary guidance for effective maintenance and repair.