The Allis-Chalmers WC Tractor, produced from 1933 to 1957, stands as a testament to enduring agricultural engineering. Renowned for its reliability and versatility, this agricultural tractor was a cornerstone of farm mechanization during its era. It offered robust performance powered by a four-cylinder, overhead valve engine, available in gasoline or distillate variants with displacements of 201.5 or 226.6 cubic inches respectively. The WC Tractor's design emphasized practicality and durability, making it a favored choice for a wide range of farming tasks. Its significance is underscored by its widespread adoption and its reputation as a dependable workhorse. This comprehensive workshop service and repair manual provides in-depth guidance for the Allis-Chalmers WC Tractor. Covering all essential aspects from engine overhaul, fuel, ignition, cooling, and lubrication systems to transmission repair, clutch maintenance, and hydraulic system servicing, this manual is an indispensable resource. It details procedures for periodic maintenance, step-by-step repair instructions, and troubleshooting common issues. With hundreds of pages of diagrams and detailed information, this English-language manual is suitable for both professional technicians and DIY mechanics, enabling effective maintenance and repair to ensure the longevity and optimal performance of the WC Tractor.