Tractor · 1930Unverified
Hart-Parr 28-44
Hart-Parr 28-44 — Standard-tread tractor · 22 hp. Reference specifications; pending source verification.
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
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.