Tractor · 1920Unverified
Hart-Parr 20
Hart-Parr 20 — Standard-tread tractor · 10 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
10 hp
Max power
10.5 kW
Weight
2013 kg
Hover a source tag to verify
Overview
ManufacturerHart-ParrReference
Standard-tread tractorReference
Built in Charles City, Iowa, USAReference
Original price was $1,195 in 1924Reference
Two-wheel driveReference
Final drivesbull gearReference
Manual steeringReference
Open operator station.Reference
Engine
Hart-Parr 4.6L 2-cyl gasolineReference
Hart-Parr 5.1L 2-cylReference
Drawbar (claimed)7.5 kWReference
Belt (claimed)14.9 kWReference
Drawbar (tested)10.5 kWReference
Belt (tested)17.2 kWReference
Hart-ParrReference
gasolineReference
2-cylinderReference
liquid-cooledReference
Displacement4.6 LReference
Bore/Stroke133 x 165 mmReference
Rated RPM800Reference
The larger engine was used in the model 20C beginning at tractor serial number 35501.Reference
Displacement5.1 LReference
Bore/Stroke140 x 165 mmReference
Belt power (max)17.2 kWReference
Max power10.5 kWReference
Transmission
2-speed gearReference
TypegearReference
Gears2 forward and 1 reverseReference
Dimensions
Weight2013 kgReference
Front tire28x5Reference
Rear tire46x10Reference
Ag front28x5 steelReference
Ag rear46x10 steelReference
20 Serial Numbers
192035001Reference
192135025Reference
192235200Reference
192235501 (20C)Reference
192335522 (20C)Reference
192435750 (20C)Reference
FAQ: How to read a serial number table.Reference
Test results
Kerosene 2-speed 2WDJune 11 - 17, 1921Link: Nebraska Tractor Test 79 fileReference
Drawbar performanceReference
Max pull1134 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.