The Allis-Chalmers CA Tractor, produced approximately between 1948 and 1957, represents a significant piece of agricultural machinery known for its utility and reliability. As a popular utility tractor, the CA model was designed to meet the demanding needs of various farming tasks, embodying the engineering quality and durability characteristic of Allis-Chalmers manufacturing. Its robust construction and functional design made it a valuable asset for farmers, contributing to its market success and enduring legacy in the agricultural sector. This comprehensive service repair manual provides essential information for the maintenance and repair of all styles of the Allis-Chalmers CA Tractor. It covers a wide range of systems, including the engine, cooling, fuel, powertrain, chassis, brakes, electrical systems, and hydraulic controls. The manual offers detailed procedures for disassembly, reassembly, routine maintenance, and troubleshooting, supported by hundreds of photos and illustrations. It is an invaluable resource for both do-it-yourself owners and professional mechanics seeking to keep their CA Tractor in optimal working condition, offering a cost-effective solution for vehicle upkeep.