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Hart-Parr 28-50

Hart-Parr 28-50 tractor
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The Hart-Parr 28-50 is a standard-tread farm tractor produced from 1927 to 1930 by Hart-Parr in Charles City, Iowa, USA. It features a Hart-Parr 11.1L 4-cylinder gasoline engine with liquid cooling, producing a claimed 28 hp at the drawbar and 50 hp at the belt. The tractor has a 2-speed gear transmission with mechanical dry disc clutch, two-wheel drive, and manual steering. It weighs 8600 lbs (3900 kg) and rides on 28x7 front and 51x14 rear steel tires. The original price was $2,085 in 1930.
Hart-Parr 28-50tractorspecificationsenginetransmissionpowerdimensionsfarm tractor
Power55 hp[B]
Founded1927 - 1930
Model28-50

Technical Specifications

Detailed specifications and technical data for Hart-Parr 28-50

Power

Belt (tested):64.56 hp (48.1 kW)
Belt (claimed):50 hp (37.3 kW)
Drawbar (tested):46.03 hp (34.3 kW)
Drawbar (claimed):28 hp (20.9 kW)

Engine

Type:Hart-Parr 11.1L 4-cyl gasoline
Cooling:liquid-cooled
Cylinders:4-cylinder
Rated RPM:850
Air cleaner:dry
Bore/Stroke:5.75x6.50 inches (146 x 165 mm)
Displacement:675.1 ci (11.1 L)

Mechanical

Drive:Two-wheel drive
Steering:Manual steering
Operator station:Open operator station

Production

Type:Standard-tread tractor
Built in:Charles City, Iowa, USA
Manufacturer:Hart-Parr
Original price:$2,085 in 1930
Years produced:1927 - 1930

Transmission

Type:gear
Gears:2 forward and 1 reverse
Clutch:mechanical dry disc

Serial Numbers

1927:70501
1928:70742
1929:70968
1930:71402

Dimensions & Tires

Weight:8600 lbs (3900 kg)
Rear tire:51x14 steel
Front tire:28x7 steel