The Allis-Chalmers D19 Diesel represents a significant piece of agricultural machinery from the 1960s, known for its robust construction and operational capabilities. As part of Allis-Chalmers' esteemed legacy in manufacturing dependable farm equipment, the D19 series was designed to meet the demanding needs of farming and industrial applications. This model, particularly the diesel variant, embodies the engineering prowess of its time, offering reliability and efficiency for a wide range of tasks. Its design reflects a commitment to durability and performance, making it a valuable asset for its intended users. This comprehensive workshop service and repair manual provides in-depth coverage for the Allis-Chalmers D19 and D19 Diesel models. It serves as an essential resource for owners and technicians, detailing maintenance procedures, troubleshooting diagnostics, and repair instructions for all major systems, including the diesel engine, fuel system, cooling system, clutch, transmission, power take-off, power lift system, brakes, steering gear, front system, belt pulley, differential, final drive, and electrical system. With clear, step-by-step instructions and detailed illustrations, this manual is designed to facilitate effective maintenance, ensure optimal performance, and extend the service life of the vehicle.