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Hart-Parr 18-28

Hart-Parr 18-28 tractor
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The Hart-Parr 18-28 is a standard-tread farm tractor produced from 1930 to 1936 by Hart-Parr, a part of Oliver, built in Charles City, Iowa, USA. It features an Oliver 4.6L 4-cylinder liquid-cooled kerosene engine, a 3-speed gear transmission with 3 forward and 1 reverse gears, and two-wheel manual steering with an open operator station. The tractor has a wheelbase of 72.5 inches, length of 112 inches, width of 61 inches, and a hood height of 53.5 inches. It weighs between 3800 and 4165 pounds. The power output is rated at 18 hp drawbar claimed and 28 hp belt claimed, with tested drawbar power of 23.56 hp and belt power of 30.29 hp. Tires are sized 28x5 front and 44x10 rear. The belt pulley diameter is 14.25 inches with a width of 7.25 inches, running at 726 RPM and a speed of 2709 ft/min.
Hart-Parr 18-28tractorspecificationsOliver engine4-cylinderkerosenefarm tractorstandard-tread1930s
Power31 hp[B]
Founded1930 - 1936
Model18-28

Technical Specifications

Detailed specifications and technical data for Hart-Parr 18-28

Power

Belt (tested):30.29 hp (22.6 kW)
Belt (claimed):28 hp (20.9 kW)
Drawbar (tested):23.56 hp (17.6 kW)
Drawbar (claimed):18 hp (13.4 kW)

Tires

Ag rear:44x10
Ag front:28x5

Engine

Make:Oliver
Cooling:liquid-cooled
Aux. fuel:1 gal (3.8 L)
Cylinders:4-cylinder
Fuel tank:14 gal (53.0 L)
Fuel type:kerosene
Bore/Stroke:4.125x5.25 inches (105 x 133 mm)
Displacement:280.6 ci (4.6 L)
Coolant capacity:32 qts (30.3 L)

Dimensions

Width:61 inches (154 cm)
Length:112 inches (284 cm)
Wheelbase:72.5 inches (184 cm)
Height (hood):53.5 inches (135 cm)
Shipping weight:3800 lbs (1723 kg)
Operating weight:4165 lbs (1889 kg)

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 made:1930 - 1936

Belt Pulley

RPM:726
Speed:2709 ft/min (825.70 meters/min)
Width:7.25 inches (18 cm)
Diameter:14.25 inches (36 cm)

Transmission

Type:gear
Gears:3 forward and 1 reverse

Related Models

Hart-Parr 80 Standard

Model:80 Standard

Hart-Parr 28-44

Model:28-44

Hart-Parr 18-27

Model:18-27