The Allis-Chalmers CA Tractor, produced from 1948 to 1957, represents a significant evolution in agricultural machinery, building upon the success of its predecessors with enhanced styling, a more powerful inline 4-cylinder gasoline engine, and standard electric starting. This robust and reliable machine, known for its solid construction and good performance, was manufactured in the United States and served as a vital tool for farmers and operators. Its design, featuring a water-cooled engine and a manual transaxle with typically four forward and one reverse gear, underscored the practical engineering of its era, making it a highly regarded and successful tractor model. This comprehensive Workshop Service Repair Manual provides detailed information for the Allis-Chalmers CA Tractor, covering all major mechanical, electrical, and body systems. It includes step-by-step repair and maintenance procedures, in-depth troubleshooting guides, and specific electrical diagnostic information with wiring schematics. The manual is designed to assist both do-it-yourself enthusiasts and professional mechanics in maintaining and repairing the tractor, ensuring optimal performance and longevity. With detailed illustrations, diagrams, and numbered instructions, this English-language manual offers a complete resource for understanding and servicing this iconic piece of agricultural equipment.