Overview
The Hart-Parr 18-28 is a standard-tread farm tractor manufactured by Oliver in Charles City, Iowa, between 1930 and 1936. It is powered by a 4.6L four-cylinder kerosene engine and features a gear transmission with three forward and one reverse speed. The mechanical layout includes a two-wheel drive system, manual steering, and an open operator station.
Ideal Applications
Tested Performance Data:
According to Nebraska Tractor Test 180, the tractor achieved a maximum belt power of 30.29 hp and a maximum drawbar pull of 3241 lbs while operating in first gear.
Engine and Fuel Configuration:
The 280.6 cubic inch liquid-cooled engine is designed to run on kerosene and is equipped with a 14-gallon main fuel tank and a 1-gallon auxiliary fuel tank.
Physical Dimensions and Belt Pulley:
This model features a 72.5-inch wheelbase and a 14.25-inch diameter belt pulley rated at 726 RPM with a belt speed of 2709 feet per minute.
Production
| Description | Standard-tread tractor / Built in Charles City, Iowa, USA |
|---|---|
| Manufacturer | Hart-Parr (a part of Oliver) |
Engine
| Aux. fuel | 1 gal (3.8 L) |
|---|---|
| Engine type | Oliver 4.6L 4-cyl kerosene |
| Fuel tank | 14 gal (53.0 L) |
| Bore/Stroke | 4.125x5.25 inches (105 x 133 mm) |
| Coolant capacity | 32 qts (30.3 L) |
| Description | Oliver / kerosene / 4-cylinder / liquid-cooled |
| Displacement | 280.6 ci (4.6 L) |
| Belt (claimed) | 28 hp (20.9 kW) |
| Belt (tested) | 30.29 hp (22.6 kW) |
| Drawbar (claimed) | 18 hp (13.4 kW) |
| Drawbar (tested) | 23.56 hp (17.6 kW) |
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 |
Dimensions & Tires
| Height (hood) | 53.5 inches (135 cm) |
|---|---|
| Length | 112 inches (284 cm) |
| Operating weight | 4165 lbs (1889 kg) |
| Shipping weight | 3800 lbs (1723 kg) |
| Wheelbase | 72.5 inches (184 cm) |
| Width | 61 inches (154 cm) |
| Front tire | 28x5 |
| Rear tire | 44x10 |
| Weight | 3800 to 4165 pounds |
| Wheelbase | 72.5 inches (184 cm) |
| Ag front | 28x5 |
| Ag rear | 44x10 |
Belt Pulley
| Diameter | 14.25 inches (36 cm) |
|---|---|
| RPM | 726 |
| Speed | 2709 ft/min (825.70 meters/min) |
| Width | 7.25 inches (18 cm) |
Nebraska Tractor Test 180
| Belt fuel use (max) | 3.0 gal/hour (11.4 l/hour) |
|---|---|
| Belt power (max) | 30.29 hp (22.6 kW) |
| Description | Kerosene 3-speed 2WDJuly 7 - 15, 1930Link: Nebraska Tractor Test 180 file / Drawbar performance / Gear 1 used for power test. / Gear 1 used for pull test. |
| Max power | 23.56 hp (17.6 kW) |
| Max pull | 3241 lbs (1470 kg) |
References
| Description | Oliver Hart-Parr Tractors published in 1930 |
|---|
Variants
| 18-27 | row-crop |
|---|---|
| 18-28 | standard |