Overview
The Hart-Parr Row Crop 18-27 is a farm tractor produced from 1930 to 1935 featuring a liquid-cooled 4.6L four-cylinder kerosene engine. This model utilizes a three-speed gear transmission and was tested at a maximum drawbar pull of 3664 lbs during Nebraska Tractor Test 176. Production included a design transition from a single front wheel to two front wheels beginning in 1931.
Ideal Applications
Adjustable Rear Tread:
This row-crop tractor features a rear tread width ranging from 60 to 74 inches and an overall width of 80 inches.
Tested Power Output:
Under Nebraska Tractor Test 176, the kerosene engine delivered 29.72 hp at the belt and 18.10 hp at the drawbar while drawing between two and three 14-inch plows.
Belt Pulley Mechanics:
The machine is equipped with a 14.5-inch diameter belt pulley that operates at 700 RPM to provide a linear speed of 2610 feet per minute.
Production
| Description | Row-Crop tractor / Built in Charles City, Iowa, USA / Introduced in 1930, the Oliver Hart-Parr Row Crop featured a single front wheel during the first two production years. In 1931, the design changed to use two front wheels. |
|---|---|
| Manufacturer | Hart-Parr (a part of Oliver) |
Engine
| Engine type | Oliver 4.6L 4-cyl kerosene |
|---|---|
| Bore/Stroke | 4.125x5.25 inches (105 x 133 mm) |
| Description | Oliver / kerosene / 4-cylinder / liquid-cooled |
| Displacement | 280.6 ci (4.6 L) |
| Belt (claimed) | 27 hp (20.1 kW) |
| Belt (tested) | 29.72 hp (22.2 kW) |
| Drawbar (claimed) | 18 hp (13.4 kW) |
| Drawbar (tested) | 18.10 hp (13.5 kW) |
| Plows | 2-3 (14-inch) |
Transmission
| Gears | 3 forward and 1 reverse |
|---|---|
| Transmission type | 3-speed gear |
| Type | gear |
Mechanical
| Cab | Open operator station. |
|---|---|
| Description | Manual steering |
| Drive type | Two-wheel drive |
| Final drives | spur gear |
Dimensions & Tires
| Height | 64 inches (162 cm) |
|---|---|
| Length | 125 inches (317 cm) |
| Rear tread | 60 to 74 inches (152 to 187 cm) |
| Weight | 3500 lbs (1587 kg) |
| Width | 80 inches (203 cm) |
| Weight | 3500 lbs (1587 kg) |
Belt Pulley
| Diameter | 14.5 inches (36 cm) |
|---|---|
| RPM | 700 |
| Speed | 2610 ft/min (795.53 meters/min) |
| Width | 7.5 inches (19 cm) |
Nebraska Tractor Test 176
| Belt fuel use (max) | 3.1 gal/hour (11.7 l/hour) |
|---|---|
| Belt power (max) | 29.72 hp (22.2 kW) |
| Description | Kerosene 3-speed 2WDApril 14 - 24, 1930Link: Nebraska Tractor Test 176 file / Drawbar performance / Gear 2 used for power test. / Gear 1 used for pull test. |
| Fuel use | 2.4 gal/hour (9.1 l/hour) |
| Max power | 18.10 hp (13.5 kW) |
| Max pull | 3664 lbs (1661 kg) |
Variants
| 18-27 | row-crop |
|---|---|
| 18-28 | standard |