Hart-Parr

Hart-Parr 28-44

The Hart-Parr 28-44 is a standard-tread farm tractor produced from 1930 to 1937 by Hart-Parr, a part of Oliver, built in Charles City, Iowa, USA. It features a 7.3L 4-cylinder liquid-cooled kerosene engine, a 3-speed gear transmission, and two-wheel drive with manual steering. The tractor delivers a claimed drawbar power of 22 hp and belt power of 44 hp, with tested drawbar and belt powers of 34.21 hp and 49.04 hp respectively. It has a rear PTO type of 540 rpm. Dimensions include an 80-inch wheelbase, 125.75-inch length, 65-inch width, and 59.5-inch hood height. The operating weight ranges from 5565 to 6415 lbs. Tires are steel with sizes 29x6 front and 46x12 rear. The tractor is suitable for 3-5 plows and includes a belt pulley with a diameter of 16.75 inches and width of 8.25 inches.

Power48 hp[B]

Founded1930 - 1937

Model28-44

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Technical Specifications

Detailed specifications and technical data for Hart-Parr 28-44

Power

Plows	3-5
Belt (tested)	49.04 hp (36.6 kW)
Belt (claimed)	44 hp (32.8 kW)
Drawbar (tested)	34.21 hp (25.5 kW)
Drawbar (claimed)	22 hp (16.4 kW)

Engine

Cooling	liquid-cooled
Cylinders	4-cylinder
Fuel tank	34 gal (128.7 L)
Fuel type	kerosene
Rated RPM	1125
Bore/Stroke	4.75x6.25 inches (121 x 159 mm)
Displacement	443 ci (7.3 L)
Engine Detail	Hart-Parr 7.3L 4-cyl kerosene
Coolant capacity	42 qts (39.7 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
Years produced	1930 - 1937

Belt Pulley

RPM	596
Speed	2600 ft/min (792.48 meters/min)
Width	8.25 inches (20 cm)
Diameter	16.75 inches (42 cm)

Transmission

Type	gear
Gears	3 forward and 1 reverse

Dimensions & Tires

Width	65 inches (165 cm)
Length	125.75 inches (319 cm)
Rear tire	46x12 (steel)
Wheelbase	80 inches (203 cm)
Front tire	29x6 (steel)
Height (hood)	59.5 inches (151 cm)
Shipping weight	5565 lbs (2524 kg)
Operating weight	6415 lbs (2909 kg)