The Allis-Chalmers Model C, also known as the Model C Tractor, is a versatile agricultural machine introduced in 1940 and produced through the mid-1950s. This highly popular tractor served as a foundational workhorse for farms of its era, characterized by its robust engineering and reliability. Featuring a 4-cylinder L-head gasoline engine with approximately 161 cubic inches of displacement, it was designed for agricultural torque output. Its typical configuration includes a manual constant mesh transmission with four forward gears and one reverse gear, mechanical drum brakes, and an open operator station, emphasizing operator awareness and caution. This comprehensive workshop service and repair manual provides detailed guidance for maintaining and repairing your Allis-Chalmers Model C Tractor. It covers a wide range of essential areas including engine overhaul, fuel system adjustments, cooling system service, ignition system troubleshooting, transmission and clutch repair, rear axle and differential maintenance, steering system service, brake system adjustments, electrical system diagrams, hydraulic system operation, PTO maintenance, and front and rear suspension upkeep. Additionally, the manual offers step-by-step repair instructions, diagnostic charts for troubleshooting common issues, and detailed overhaul procedures, making it an indispensable resource for professional technicians and tractor owners alike.