Hart-Parr 28-50

The Hart-Parr 28-50 is a tractor produced by Hart Parr. It is equipped with a 675.1 ci 11.1 L engine. The rated power output is 64.56 hp 48.1 kW. Transmission: 2 forward and 1 reverse. Operating weight: 8600 lbs 3900 kg.

Overview

	1927 - 1930 Standard-tread tractor
1927 - 1930
Standard-tread tractor

Production
Manufacturer	Hart-Parr
Standard-tread tractor
Built in Charles City, Iowa, USA
Original price was $2,085 in 1930

Hart-Parr 28-50 Engine
Hart-Parr 11.1L 4-cyl gasoline
Engine details ...

Hart-Parr 28-50 Transmission
2-speed gear
Transmission details ...

Hart-Parr 28-50 Power
Drawbar (claimed)	28 hp 20.9 kW
Belt (claimed)	50 hp 37.3 kW
Drawbar (tested)	46.03 hp 34.3 kW
Belt (tested)	64.56 hp 48.1 kW
Performance test details ...

Mechanical
Two-wheel drive
Manual steering
Open operator station.

Dimensions & Tires
Weight	8600 lbs 3900 kg
Front tire	28x7
Rear tire	51x14
Full dimensions and tires ...

Engine

Engine Detail — 675.1 ci / 11.1 L Gasoline

Manufacturer	Hart-Parr
Fuel Type	Gasoline
Configuration	4-cylinder, liquid-cooled
Displacement	675.1 ci 11.1 L
Bore/Stroke	5.75x6.50 inches 146 x 165 mm
Air cleaner	dry
Rated RPM	850

Transmission

Transmission — 2 forward and 1 reverse gear

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

Dimensions

Hart-Parr 28-50 Tires
Ag front	28x7 steel
Ag rear	51x14 steel

Dimensions
Weight	8600 lbs 3900 kg

Tests

Nebraska Tractor Test 140
Kerosene 2-speed 2WD August 17 - 31, 1927 Link: Nebraska Tractor Test 140 file
Belt power (max)	64.56 hp 48.1 kW
Drawbar performance
Max power	46.03 hp 34.3 kW
Max pull	7347 lbs 3332 kg

Photos

Hart-Parr 28-50 New York Special, left side.

Hart-Parr 28-50 New York Special, right side.