This comprehensive workshop service and repair manual provides an in-depth guide to maintaining and repairing Nuffield 4M, 4PM, 4DM, 3DL, 342, and 460 tractors. It covers the entire vehicle, from the engine to the electrical system, ensuring you have all the necessary information to perform repairs and maintenance efficiently. The manual features detailed instructions, exploded diagrams, and illustrations, making it easy to understand and follow. It includes detailed sections covering: * **General Information:** Provides an overview of the tractor's design and operation. * **Engine OEC Three Cylinder Diesel, Engine OEA Four Cylinder Diesel, Engine ETC, ETD Petrol & V.O.:** Includes in-depth information on these engines, covering their operation, maintenance, and troubleshooting. * **Ignition:** Detailed explanations and instructions for the tractor's ignition system. * **Cooling System:** Comprehensive guide to the cooling system, including maintenance and repair procedures. * **Fuel System:** Covers the fuel system's components, operation, and troubleshooting. * **Clutch:** Detailed information on the clutch, including adjustments, repair, and replacement. * **Governor:** Explains the governor's function, adjustment, and troubleshooting. * **Gearbox and Transmission:** In-depth guide to the gearbox and transmission, covering operation, maintenance, and repair. * **Steering Gear:** Comprehensive information on the steering system, including adjustments and repair procedures. * **Front Axle:** Detailed instructions on the front axle, including maintenance and repair. * **Wheels and Tires:** Covers the selection, maintenance, and repair of wheels and tires. * **Braking System:** Provides detailed guidance on the braking system, including adjustments and repair procedures. * **Electrical System:** Includes a complete guide to the tractor's electrical system, covering troubleshooting and repair. * **Drawbar:** Detailed information on the drawbar, including its operation and maintenance. * **Lubrication:** Comprehensive guide to lubrication, covering fluids, schedules, and procedures. * **Optional Equipment:** Information on common optional equipment and their operation. * **Implement Setting:** Guidance on setting up and using various implements. * **Universal Three/Four:** Covers the operation and maintenance of the universal three/four system. This manual will become your essential resource for keeping your Nuffield tractor running smoothly.

The Nuffield 4M, 4PM, 4DM, 3DL, 342, and 460 tractors were a range of versatile and robust agricultural machines produced by the Nuffield Organization from the 1950s to the 1970s. These tractors were known for their reliability, ease of maintenance, and powerful performance, making them popular choices for a wide range of farming tasks. The 4M, 4PM, and 4DM models were powered by a 4-cylinder diesel engine with a displacement ranging from 3.4 to 4.0 liters, providing a power output from 40 to 50 horsepower. The 3DL and 342 models were equipped with a 3-cylinder diesel engine with a 2.5-liter displacement and a power output of around 32 horsepower. The 460 model, known for its larger size and increased power output, featured a 6-cylinder diesel engine with a 6.6-liter displacement and a power output of 84 horsepower. These tractors were designed with a focus on practicality and durability. They featured a rugged cast iron construction, simple mechanical components, and a straightforward layout, making them easy to repair and maintain. Many of the models were available with a variety of optional attachments, including front-end loaders, plows, cultivators, and balers, enabling them to handle a wide range of farm tasks. The Nuffield tractors were popular in various countries due to their reliability and adaptability. Their robust design and ease of maintenance played a significant role in their success, making them a staple among farmers and agricultural businesses worldwide. While these models are no longer in production, they remain a testament to the engineering prowess of Nuffield and continue to be cherished by vintage tractor enthusiasts and collectors for their historical significance and enduring mechanical character.