The Allis-Chalmers Model 190 tractor, produced approximately between 1964 and 1968, represents a robust and versatile piece of agricultural machinery. Known for its reliable Allis-Chalmers diesel engine and Synchro-Range transmission, this tractor was designed to handle a variety of farm tasks. Its engineering reflects the legacy of Allis-Chalmers in building durable equipment, offering an estimated 65-75 PTO horsepower suitable for demanding work. The Model 190 was a significant part of the company's tractor line during the mid-to-late 1960s, embodying the brand's commitment to quality and performance in the agricultural sector. This comprehensive service repair manual provides in-depth guidance for the Allis-Chalmers Model 190 tractor. It covers a wide array of systems including the engine, transmission, brakes, electrical, cooling, fuel, and hydraulic systems, along with suspension, steering, and chassis components. Detailed procedures for general maintenance, troubleshooting, disassembly, reassembly, and even complete engine and transmission overhauls are included. The manual is designed to empower tractor owners, farm mechanics, and DIY enthusiasts to perform high-quality repairs and maintenance, ensuring the longevity and optimal performance of their equipment through clear instructions and diagrams.