The Nuffield Three 3 Tractor Universal, a robust agricultural machine from the mid-20th century, represents a significant piece of British engineering. Produced during an era when Nuffield was a prominent name in agricultural machinery, this tractor was designed for versatility and reliability in various farming operations. Its solid construction and straightforward design have made it a dependable workhorse, embodying the quality and durability characteristic of Nuffield tractors. This model is a testament to the practical engineering that supported agricultural advancements during its production era. This comprehensive workshop service repair manual provides detailed information for the Nuffield Three 3 Tractor Universal. It covers a wide range of systems, including the engine's mechanical and electrical components, fuel system, clutch, manual and automatic transaxles, driveshaft, axle, steering, and brake systems. Additionally, it addresses bodywork, interior and exterior elements, and the restraint system. The manual is designed to assist both do-it-yourself enthusiasts and professional mechanics with routine maintenance, component repair and overhaul, diagnostics, and systematic troubleshooting, ensuring the longevity and optimal performance of the tractor.