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Tractor · 1930Unverified

Hart-Parr 28-44

Name: Hart-Parr 28-44
Brand: Hart-Parr

Hart-Parr 28-44 — Standard-tread tractor · 22 hp. Reference specifications; pending source verification.

The Hart-Parr 28-44 is a tractor model with a rated output of 22 hp, ranking it among the more compact options within its class. It was manufactured between 1930 and 1937. The tractor is equipped with a 4-cylinder liquid-cooled engine, which drives through two-wheel drive via a 3-speed gearbox. Its listed weight ranges from 5565 to 6415 pounds, with an application capacity of approximately 200 ac.

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

Rated power

22 hp

Max power

25.5 kW

Weight

5565 to 6415 pounds

Catalogue coverage

Variants represented

Richest spec table

58 rows

Recorded power

22 hp

Recorded weight

2524 kg

Transmissions

3-speed gear

Production years

1930-1937

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-Parr (a part of Oliver)Reference

Standard-tread tractorReference

Built in Charles City, Iowa, USAReference

Two-wheel driveReference

Manual steeringReference

Open operator station.Reference

Engine

Hart-Parr 7.3L 4-cyl keroseneReference

Fuel tank128.7 LReference

Drawbar (claimed)16.4 kWReference

Belt (claimed)32.8 kWReference

Plows3-5Reference

Drawbar (tested)25.5 kWReference

Belt (tested)36.6 kWReference

Hart-ParrReference

keroseneReference

4-cylinderReference

liquid-cooledReference

Displacement7.3 LReference

Bore/Stroke121 x 159 mmReference

Rated RPM1125Reference

Coolant capacity39.7 LReference

Belt power (max)36.6 kWReference

Max power25.5 kWReference

Transmission

3-speed gearReference

TypegearReference

Gears3 forward and 1 reverseReference

PTO & Hydraulics

Rear PTO Type540Reference

Dimensions

Wheelbase203 cmReference

Weight5565 to 6415 poundsReference

Front tire29x6Reference

Rear tire46x12 (steel)Reference

Ag front29x6 (steel)Reference

Ag rear46x12 (steel)Reference

Length319 cmReference

Width165 cmReference

Height (hood)151 cmReference

Shipping weight2524 kgReference

Operating weight2909 kgReference

28-44 Serial Numbers

1930500001Reference

1931503599Reference

1932506185Reference

1933506212Reference

1934506255Reference

1935506401Reference

1936507176Reference

1937508016Reference

Final508917Reference

FAQ: How to read a serial number table.Reference

Capacities

Diameter42 cmReference

Width20 cmReference

RPM596Reference

Speed792.48 meters/minReference

Test results

Kerosene 3-speed 2WDOctober 13 - 27, 1930Link: Nebraska Tractor Test 183 fileReference

Belt fuel use (max)18.5 l/hourReference

Drawbar performanceReference

Gear 2 used for power test.Reference

Max pull2320 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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