Hart-Parr
Hart-Parr 28-50
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.
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 |