Tractor · 1927Unverified
Hart-Parr 28-50
Hart-Parr 28-50 — Standard-tread tractor · 28 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
28 hp
Max power
34.3 kW
Weight
3900 kg
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.