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Tractor · 1950Unverified

Nuffield PM-4 Universal

Name: Nuffield PM-4 Universal
Brand: Nuffield

Nuffield PM-4 Universal — Utility tractor · 41 hp. Reference specifications; pending source verification.

The Nuffield PM-4 Universal is a tractor with an approximate engine rating of 41 hp, positioning it towards the lower end of its class in terms of power. It was manufactured from 1950 to 1957. The tractor features a 4-cylinder diesel liquid-cooled engine, coupled with two-wheel drive and a 5-speed gearbox. Its listed operating weight is 2407 kg, and it is suited for operations covering up to 200 acres.

Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.

Rated power

41 hp

Max power

25.1 kW

Weight

2407 kg

Catalogue coverage

Variants represented

Richest spec table

70 rows

Recorded power

41 hp

Recorded weight

2407 kg

Transmissions

5-speed gear

Production years

1950-1957

Verified variants

No linked source document is currently displayed; verify critical figures with the manufacturer or dealer.

Hover a source tag to verify

Overview

ManufacturerNuffieldReference

Utility tractorReference

Built in Birmingham, EnglandReference

Two-wheel driveReference

Manual steeringReference

Independent mechanical expanding band brakesReference

Open operator station.Reference

Variants

PM4gasoline standardReference

DM4diesel standardReference

PM3Vgasoline tricycleReference

DM3Vdiesel tricycleReference

Engine

Morris Motors 3.8L 4-cyl gasolineReference

Fuel tank63.6 LReference

Aux. fuel6.8 LReference

Engine30.4 kWReference

Drawbar (claimed)25.5 kWReference

Belt (claimed)32.4 kWReference

Drawbar (tested)25.1 kWReference

Belt (tested)28.6 kWReference

Morris MotorsReference

gasolineReference

4-cylinderReference

liquid-cooled vertical L-headReference

Displacement3.8 LReference

Bore/Stroke100 x 120 mmReference

Power30.4 kWReference

Air cleaneroil bathReference

Compression6:1Reference

Rated RPM2000Reference

Torque306.5 NmReference

Torque RPM950Reference

Starter volts12Reference

Coolant capacity17.0 LReference

Belt power (max)28.6 kWReference

Max power25.1 kWReference

Transmission

5-speed gearReference

TypegearReference

Gears5 forward and 1 reverseReference

Clutch280mm dry discReference

PTO & Hydraulics

Typeopen centerReference

Pressure82.7 barReference

Pressure137.9 barReference

Rear PTO Type540 (1.375)Reference

Engine RPM528@1400Reference

Dimensions

Wheelbase198 cmReference

Weight2407 kgReference

Front tire6.00-16Reference

Rear tire11.00-36Reference

Ag front6.00-16Reference

Ag rear11.00-36Reference

Ag front7.50-18Reference

Ag rear13.00-30Reference

Ag rear14.00-30Reference

Ag rear9.00-36Reference

Length309 cmReference

Height (hood)151 cmReference

Height (exhaust)204 cmReference

Operating weight2407 kgReference

Ballasted weight3522 kgReference

Ground clearance53 cmReference

Clearance (front axle)43 cmReference

Clearance (drawbar)54 cmReference

Front tread134 to 180 cmReference

Rear tread135 to 224 cmReference

Test results

Gasoline 5-speed 2WDAugust 29 - September 8, 1955Link: Nebraska Tractor Test 559 fileReference

Belt fuel use (max)14.8 l/hourReference

Drawbar performanceReference

Gear 3 used for power test.Reference

Max pull2365 kgReference

Gear 1 used for pull test.Reference

Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.

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