All 37 values recorded for this model, as the source lists them and in its units. The spec sheet shows the same data checked, typed and converted.
Overview
Production
Manufacturer
Hart-Parr
(no label)
Standard-tread tractor
(no label)
Built in Charles City, Iowa, USA
(no label)
Original price was $2,250 in 1927
Engine
(no label)
Hart-Parr 10.1L 4-cyl gasoline
Transmission
(no label)
2-speed gear
Power
Drawbar (claimed)
22 hp | 16.4 kW
Belt (claimed)
40 hp | 29.8 kW
Drawbar (tested)
28.23 hp | 21.1 kW
Belt (tested)
46.40 hp | 34.6 kW
Mechanical
(no label)
Two-wheel drive
(no label)
Manual steering
(no label)
Open operator station.
Dimensions
Weight
7500 lbs | 3402 kg
Front tire
28x5
Rear tire
52x13
Belt pulley
Diameter
14 inches | 35 cm
Width
9 inches | 22 cm
RPM
800
Speed
2750 ft/min | 838.20 meters/min
Engine
Engine detail
(no label)
Hart-Parr
(no label)
gasoline
(no label)
4-cylinder
(no label)
liquid-cooled
(no label)
The Hart-Parr 22-40 used a pair of two-cylinder engine blocks from the 20C on a single crankshaft to create the four-cylinder engine. Early models used two carburetors while later models had a single carburetor to feed both blocks.