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Tractor · 1927Unverified

Hart-Parr 28-50

Name: Hart-Parr 28-50
Brand: Hart-Parr

Hart-Parr 28-50 — Standard-tread tractor · 28 hp. Reference specifications; pending source verification.

The Hart-Parr 28-50 is a compact tractor with a rated output of 28 hp. It was manufactured from 1927 to 1930 and is equipped with a 4-cylinder petrol liquid-cooled engine. The tractor features two-wheel drive and a 2-speed gearbox, and its listed weight is 3900 kg. It is designed for use on small to medium-sized areas of around 200 acres.

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

Rated power

28 hp

Max power

34.3 kW

Weight

3900 kg

Catalogue coverage

Variants represented

Richest spec table

39 rows

Recorded power

28 hp

Recorded weight

3900 kg

Transmissions

2-speed gear

Production years

1927-1930

Verified variants

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

Hover a source tag to verify

Overview

ManufacturerHart-ParrReference

Standard-tread tractorReference

Built in Charles City, Iowa, USAReference

Original price was $2,085 in 1930Reference

Two-wheel driveReference

Manual steeringReference

Open operator station.Reference

Engine

Hart-Parr 11.1L 4-cyl gasolineReference

Drawbar (claimed)20.9 kWReference

Belt (claimed)37.3 kWReference

Drawbar (tested)34.3 kWReference

Belt (tested)48.1 kWReference

Hart-ParrReference

gasolineReference

4-cylinderReference

liquid-cooledReference

Displacement11.1 LReference

Bore/Stroke146 x 165 mmReference

Air cleanerdryReference

Rated RPM850Reference

Belt power (max)48.1 kWReference

Max power34.3 kWReference

Transmission

2-speed gearReference

TypegearReference

Gears2 forward and 1 reverseReference

Clutchmechanical dry discReference

Dimensions

Weight3900 kgReference

Front tire28x7Reference

Rear tire51x14Reference

Ag front28x7 steelReference

Ag rear51x14 steelReference

28-50 Serial Numbers

192770501Reference

192870742Reference

192970968Reference

193071402Reference

FAQ: How to read a serial number table.Reference

Test results

Kerosene 2-speed 2WDAugust 17 - 31, 1927Link: Nebraska Tractor Test 140 fileReference

Drawbar performanceReference

Max pull3332 kgReference

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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