Introduction
Nuffield 4/65 Tractor
The Nuffield 4/65 is a two-wheel drive agricultural tractor manufactured by Nuffield in Bathgate, Scotland, between 1967 and 1969. Positioned as a robust machine for general farm operations, it belongs to the era of classic British tractors, succeeding the 10/60 series.
Engine and Performance
The tractor is powered by a BMC 4-cylinder, 8-valve diesel engine with a displacement of 231 cubic inches (3.8 liters). It produces a rated power of 65 horsepower at 2500 engine RPM. The engine features liquid cooling and a compression ratio of 16.5:1, delivering a maximum torque of 170 lb-ft (230.5 Nm) at 1200 RPM, providing steady lugging capability for field work.
Transmission and Drivetrain
The drivetrain consists of a gear-type transmission providing 10 forward and 2 reverse speeds, organized into two ranges. Power is transferred via a 280mm dry disc clutch. The final drives utilize a spur gear arrangement, and the tractor is configured exclusively as a two-wheel drive machine.
Hydraulics and PTO
The rear power take-off (PTO) operates at a standard 540 RPM, achieved at an engine speed of 1800 RPM. An independent PTO system was available as an optional feature. The rear hitch is categorized as type II/I and includes directional control with top-link draft sensing to manage mounted implements.
Dimensions and Operator Station
The 4/65 features an open operator station with manual steering, though power-assisted steering was offered as an option. It has a wheelbase of 79.9 inches (202 cm) and an operating weight of 5,140 lbs (2,331 kg). The ground clearance under the drawbar is 15.3 inches (38 cm), and the front axle clearance is 17.2 inches (43 cm), allowing for operation in various crop conditions.
Conclusion
The Nuffield 4/65 is a dependable, mid-range tractor suitable for traditional cultivation and transport tasks. Its mechanical simplicity and parts commonality make it a practical choice for collectors and small-scale agricultural operations requiring a sturdy, reliable workhorse.
Production Information of Nuffield, 4/65
- Built in Bathgate, Scotland
| Manufacturer | Nuffield |
|---|
Dimension and Tires Information of Nuffield, 4/65
| Rear tread | 52 to 80 inches [132 to 203 cm] |
|---|---|
| Wheelbase | 79.9 inches [202 cm] |
| Height (exhaust) | 86.6 inches [219 cm] |
| Height (hood) | 60.6 inches [153 cm] |
| Length | 126.4 inches [321 cm] |
| Clearance (front axle) | 17.2 inches [43 cm] |
| Operating weight | 5140 lbs [2331 kg] |
| Width | 67.7 inches [171 cm] |
| Rear tread | 54 to 88 inches [137 to 223 cm] |
| Front tread | 52 to 76 inches [132 to 193 cm] |
| Clearance (drawbar) | 15.3 inches [38 cm] |
| Ground clearance | 23.1 inches [58 cm] |
| Ag front | 6.00-16 |
|---|---|
| Ag front(optional) | 14.00-30 |
| Ag rear | 12.00-38 |
| Ag rear | 11.00-36 |
| Ag rear(optional) | 15.00-30 |
| Ag front | 7.50-16 |
Engine Specifications of Nuffield, 4/65
- BMC
- Liquid-cooled OHV
- 4-cylinder 8-valve
- Diesel
| Coolant capacity | 14.4 qts [13.6 L] |
|---|---|
| Oil capacity | 9.5 qts [9.0 L] |
| Compression | 16.5:1 |
| Torque | 170 lb-ft [230.5 Nm] |
| Idle RPM | 630-2160 |
| Displacement | 231 ci [3.8 L] |
| Power | 65 hp [48.5 kW] |
| Rated RPM | 2500 |
| Bore/Stroke | 3.937x4.724 inches [100 x 120 mm] |
| Starter volts | 12 |
| Firing order | 1-3-4-2 |
| Torque RPM | 1200 |
Transmission Information of Nuffield, 4/65
Transmission variants 1
- Five gears, plus reverse, in two ranges.
| Type | Gear |
|---|---|
| Oil capacity | 59.7 qts [56.5 L] |
| Gears | 10 forward and 2 reverse |
| Clutch | 280mm dry disc |
Mechanical Specs of Nuffield, 4/65
- Two-wheel drive
- Mechanical disc brakes
- Open operator station.
| Steering(optional) | Power |
|---|---|
| Final drives | Spur gear |
| Steering | Manual |
Power Information of Nuffield, 4/65
| Rear PTO | Transmission |
|---|---|
| Engine RPM | 540@1800 |
| Engine RPM(optional) | Independent |
| Rear PTO Type | 540 (1.375) |
Three-Point Hitch of Nuffield, 4/65
| Rear Type | II/I |
|---|---|
| Control | Directional control and top-link draft sensing |
Where it sits
With 65 HP, the Nuffield 4/65 sits just above 10/60 (61 HP) in Nuffield's range. Its power puts it in the 68th percentile of 1960s models in our database (709 machines).
Frequently asked questions
How much horsepower does the Nuffield 4/65 have?
The Nuffield 4/65 delivers 65 HP.
What years was the Nuffield 4/65 produced?
The Nuffield 4/65 was produced in 1967-1969.
What engine does the Nuffield 4/65 have?
The Nuffield 4/65 is powered by a Diesel, 4-cylinder 8-valve engine.
What transmission does the Nuffield 4/65 use?
The Nuffield 4/65 uses a Gear transmission.
How much does the Nuffield 4/65 weigh?
The Nuffield 4/65 weighs 5140 lbs [2331 kg].
Is the Nuffield 4/65 4WD?
The Nuffield 4/65 is available in 2WD.