Hart-Parr 28-44: all source data
All 41 values recorded for this model, as the source lists them and in its units. The spec sheet shows the same data checked, typed and converted.
Overview
Production| Manufacturer | Hart-Parr (a part of Oliver) |
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| (no label) | Standard-tread tractor |
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| (no label) | Built in Charles City, Iowa, USA |
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Engine| (no label) | Hart-Parr 7.3L 4-cyl kerosene |
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| Fuel tank | 34 gal | 128.7 L |
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Transmission| (no label) | 3-speed gear |
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Power| Drawbar (claimed) | 22 hp | 16.4 kW |
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| Belt (claimed) | 44 hp | 32.8 kW |
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| Plows | 3-5 |
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| Drawbar (tested) | 34.21 hp | 25.5 kW |
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| Belt (tested) | 49.04 hp | 36.6 kW |
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Mechanical| (no label) | Two-wheel drive |
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| (no label) | Manual steering |
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| (no label) | Open operator station. |
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Dimensions| Wheelbase | 80 inches | 203 cm |
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| Weight | 5565 to 6415 pounds |
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| Front tire | 29x6 |
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| Rear tire | 46x12 (steel) |
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Belt pulley| Diameter | 16.75 inches | 42 cm |
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| Width | 8.25 inches | 20 cm |
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| RPM | 596 |
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| Speed | 2600 ft/min | 792.48 meters/min |
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Engine
Engine detail| (no label) | Hart-Parr |
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| (no label) | kerosene |
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| (no label) | 4-cylinder |
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| (no label) | liquid-cooled |
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| Displacement | 443 ci | 7.3 L |
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| Bore/Stroke | 4.75x6.25 inches | 121 x 159 mm |
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| Rated RPM | 1125 |
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| Coolant capacity (Coolant) | 42 qts | 39.7 L |
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Transmission
Transmission| Type | gear |
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| Gears | 3 forward and 1 reverse |
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Dimensions
Tires| Ag front | 29x6 (steel) |
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| Ag rear | 46x12 (steel) |
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Dimensions| Wheelbase | 80 inches | 203 cm |
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| Length | 125.75 inches | 319 cm |
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| Width | 65 inches | 165 cm |
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| Height (hood) | 59.5 inches | 151 cm |
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| Shipping weight | 5565 lbs | 2524 kg |
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| Operating weight | 6415 lbs | 2909 kg |
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