Skip to contentNuffield PM4 1950, Gram 1 — Hjart, CC BY-SA 4.0. Resized; converted to WebP. · Hjart · CC BY-SA 4.0 commons.wikimedia.org source ↗ Nuffield PM4 1950, Gram 1 — Hjart, CC BY-SA 4.0. Resized; converted to WebP. · Hjart · CC BY-SA 4.0 commons.wikimedia.org source ↗
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Years in Production / 1950–1957
Nuffield
PM-4
Explore the specifications, hardware, and original references for the Nuffield PM-4.
40hp
Source index power
2WD Only
Drive
1950–1957
Production years
Nuffield
Manufacturer
PM-4 / 01
At a glance
Production
Utility tractor
Built in Birmingham, England
- Manufacturer
- Nuffield
Hydraulics
- Type
- open center
- Pressure
- 1200 psi82.7 bar
- Pressure
- 2000 psi (1955 onward)137.9 bar
Pto
- Rear Type
- 540 (1.375)
- Engine Rpm
- 528@1400
Mechanical
Two-wheel drive
Manual steering
Independent mechanical expanding band brakes
Open operator station.
PM-4 / 02
Under the hood
Engine Detail
Morris Motors
gasoline
4-cylinder
liquid-cooled vertical L-head
- Displacement
- 230 ci3.8 L
- Bore Stroke
- 3.937x4.724 inches100 x 120 mm
- Power
- 40.8 hp30.4 kW
- Air Cleaner
- oil bath
- Compression Ratio
- 6:1
- Rated Rpm
- 2000
- Torque
- 226 lb-ft306.5 Nm
- Torque Rpm
- 950
- Starter Volts
- 12
- Coolant Capacity
- 18 qts17.0 L
- Fuel Type
- gasoline
- Cylinders
- 4
- Cooling
- liquid-cooled vertical L-head
Engine Options
Morris Motors 3.8L 4-cyl gasoline
- Fuel Tank
- 16.8 gal63.6 L
- Aux Fuel
- 1.8 gal6.8 L
PM-4 / 03
Gears & controls
Transmission
- Transmission Type
- gear
- Gears
- 5 forward and 1 reverse
- Clutch
- 280mm dry disc
PM-4 / 04
Size. Stance. Footprint.
Dimensions
- Length
- 121.7 in309 cm
- Height
- 59.5 in151 cm
- Wheelbase
- 78 in198 cm
- Ground clearance
- 21 in53 cm
- Front tread
- 52.8 in134 cm
- Rear tread
- 53.2 in135 cm
Dimensions And Tires
- Wheelbase
- 78 inches198 cm
- Weight
- 5,307 lbs2407 kg
- Front Tire
- 6.00-16
- Rear Tire
- 11.00-36
Tires And Tracks
- Front Ag
- 6.00-16
- Front Ag
- 7.50-18
- Rear Ag
- 11.00-36
- Rear Ag
- 13.00-30
- Rear Ag
- 14.00-30
- Rear Ag
- 9.00-36
PM-4 / 05
Tractor Photos
PM-4 / 06
Tests (NTTL)
Nebraska Tractor Test 559Nebraska test report ↗
Gasoline 5-speed 2WDAugust 29 - September 8, 1955
Drawbar performance
Gear 3 used for power test.
Gear 1 used for pull test.
- Id
- 559
- Belt Power Max
- 38.4 hp28.6 kW
- Belt Fuel Use Max
- 3.9 gal/hour14.8 l/hour
- Max Power
- 33.66 hp25.1 kW
- Max Pull
- 5216 lbs2365 kg