The Allis-Chalmers B Tractor, produced approximately between 1937 and 1957, stands as one of the most popular and versatile tractors of its era. Renowned for its durability and widespread use, this model represents a significant piece of agricultural machinery history. Its robust engineering and reliable performance made it a staple for countless operations, cementing its reputation for quality and enduring value. The B Tractor was designed to meet the demanding needs of its time, offering a dependable solution for various agricultural tasks. This comprehensive workshop service repair manual provides detailed information for the Allis-Chalmers B Tractor. It covers a wide array of systems, including the engine, cooling system, fuel system, powertrain, clutch, brakes, electrical system, and hydraulic system, among others. The manual offers complete disassembly instructions, step-by-step repair guidance, and troubleshooting procedures, making it an invaluable resource for do-it-yourself owners and experienced mechanics alike. With hundreds of photos and illustrations, along with detailed wiring diagrams, this manual ensures a high level of technical understanding for maintaining and repairing the tractor effectively.