Nuffield
PM-4
Farm tractor · 1950–1957 · 40 hp
NuffieldPM-4
The Nuffield PM-4 is a farm tractor manufactured from 1950 to 1957. It features a Morris Motors engine, and manual steering. The transmission is a gear type with 5 forward and 1 reverse.
Engine
| Engine | Morris Motors |
|---|---|
| Fuel Type | gasoline |
| Cylinders | 4 |
| Cooling | liquid-cooled vertical L-head |
| Displacement | 230 ci (3.8 L) |
| Bore | 3.94 in (100 mm) |
| Stroke | 4.72 in (120 mm) |
| Compression Ratio | 6 |
| Power Gross | 40.8 hp (30.4 kW) |
| Power Rated | 40.8 hp (30.4 kW) |
| Power Drawbar | 33.66 hp (25.1 kW) |
| Power Belt | 38.4 hp (28.6 kW) |
| Torque Peak | 226 lb-ft (306.5 Nm) |
| Torque Peak | 950 RPM |
| Air Cleaner | oil bath |
| Starter Volts | 12 |
| Coolant Capacity | 18 qts (17 L) |
| Manufacturer | Morris Motors |
| Rated | 2,000 RPM |
Transmission
| Transmission Type | gear |
|---|---|
| Gears | 5 forward and 1 reverse |
| Clutch | 280mm dry disc |
| Available Options | 5-speed gear |
Hydraulics
| Type | open center |
|---|---|
| Pressure | 1,200 psi (82.7 bar) |
PTO
| Rear Type | 540 |
|---|
Dimensions
| Length | 121.7 in (309 cm) |
|---|---|
| Height | 59.5 in (151 cm) |
| Wheelbase | 78 in (198 cm) |
| Ground Clearance | 21 in (53 cm) |
| Front Tread | 52.8 in (134 cm) |
| Rear Tread | 53.2 in (135 cm) |
Weight
| Operating | 5,307 lbs (2,407 kg) |
|---|---|
| Ballasted | 7,765 lbs (3,522 kg) |
Tires & Tracks
| Front Ag | 6.00-16, 7.50-18 |
|---|---|
| Rear Ag | 11.00-36, 13.00-30, 14.00-30, 9.00-36 |
Fuel
| Capacity | 16.8 gal (63.6 L) |
|---|
Steering
| Type | manual |
|---|