The Allis-Chalmers D-19 tractor, produced between 1959 and 1963, represents a significant offering from a manufacturer renowned for its durable and innovative agricultural machinery. This model was a key part of the successful D-series line, building upon previous designs to offer enhanced power and features for demanding farm operations. Available with either a 226ci (3.7L) gasoline engine or a 201ci (3.3L) diesel engine, the D-19 was engineered for reliability and performance, becoming a trusted workhorse in its era. Its robust construction and straightforward design contributed to its widespread adoption and lasting reputation for value in agricultural applications. This comprehensive workshop and service repair manual provides in-depth technical information for the Allis-Chalmers D-19. It covers all major mechanical and electrical systems, including detailed diagnosis, overhaul, and repair procedures for the engine, fuel, ignition, cooling, lubrication, transmission, drive train, steering, brake, and hydraulic systems. The manual also includes guidance on maintenance, troubleshooting, assembly, disassembly, and provides essential specifications such as torque values and clearances. Designed for professional mechanics and experienced users, this English-language manual facilitates efficient maintenance and repair, ensuring the continued operational integrity of the D-19 tractor.