Hart-Parr 40 tractor specifications

1923 - 1927

1923 - 1927 Standard-tread tractor

Production

Production Manufacturer:Hart-Parr
Type:Standard-tread tractor
Factory:Charles City, Iowa, USA
Original price:$2,250 (1927 )

Hart-Parr 40 Power

Hart-Parr 40 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
power test details ...

1923 - 1927

Standard-tread tractor

Nebraska Tractor Test 97

Nebraska Tractor Test 97
Kerosene 2-speed 2WD July 10 - 19, 1923 Link: Nebraska Tractor Test 97 file
Belt power (max):	46.40 hp 34.6 kW
Belt fuel use (max):	6.3 gal/hour 23.8 l/hour
Drawbar performance
Max power:	28.23 hp 21.1 kW
Max pull:	4830 lbs 2190 kg

Hart-Parr 40 Engine

Hart-Parr 40 Engine Hart-Parr 10.1L 4-cyl gasoline Engine details ...

1923 - 1927

Standard-tread tractor

Engine Detail

Engine Detail
Hart-Parr
gasoline
4-cylinder
liquid-cooled
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.
Displacement:	617.7 ci 10.1 L
Bore/Stroke:	5.50x6.50 inches 140 x 165 mm
Rated RPM:	800