The Allis-Chalmers WC tractor, produced from 1933 to 1957, represents a significant milestone in agricultural equipment. Renowned for its versatility and reliability, this model was one of the most successful tractors of its time. Featuring a robust Allis-Chalmers Model E engine with approximately 201.5 cubic inches of displacement, it delivered dependable power for a wide range of farming tasks, with rated belt horsepower around 26 HP and drawbar horsepower near 18 HP. Its sturdy construction, including a wheelbase of approximately 77 inches and an operating weight between 3,300 and 3,700 lbs, made it a workhorse capable of handling demanding field conditions. The WC's enduring legacy is cemented by its widespread adoption and its status as an icon of American agriculture. This comprehensive service repair manual provides essential information for the maintenance and repair of the Allis-Chalmers WC tractor. It covers all aspects of repair, service, and maintenance, offering detailed guidance on engine service, transmission repair, brake system adjustments, and electrical system diagnostics. The manual includes troubleshooting guides and procedures, along with general maintenance schedules, lubrication points, and fluid specifications. Whether for routine upkeep or complex repairs, this resource is designed to empower owners and professional mechanics alike, enabling them to keep their WC tractor in optimal working condition through clear, step-by-step instructions and essential technical data.