The Allis-Chalmers WC Tractor, produced from 1933 to 1957, represents a significant piece of agricultural machinery history. Known for its reliability and versatility, this tractor was a workhorse designed for a wide range of farming tasks. Equipped with a 4-cylinder gasoline, kerosene, or distillate engine, it typically offered around 28-32 belt horsepower, making it suitable for various implements. Its robust construction, including a sliding gear transmission with four forward gears and one reverse, and mechanical brakes, underscored its practical engineering for the era. The WC's success and widespread adoption are testaments to its enduring design and performance in agricultural applications. This Service Repair Manual provides comprehensive guidance for the Allis-Chalmers WC Tractor. It covers essential areas including general information, periodic maintenance, engine overhaul, fuel and cooling systems, electrical components, and chassis systems such as the clutch, transmission, steering, and brakes. Detailed procedures for maintenance, repair, and troubleshooting are included, supported by numerous illustrations. The manual is designed to empower both do-it-yourself owners and professional mechanics, offering the knowledge needed to maintain the tractor's longevity and optimal performance, ultimately reducing service costs while ensuring operational readiness.