Hart-Parr 40
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| Production | |
| Manufacturer | Hart-Parr |
| Standard-tread tractor | |
| Built in Charles City, Iowa, USA | |
| Original price was $2,250 in 1927 | |
| Hart-Parr 40 Engine | |
| Hart-Parr 10.1L 4-cyl gasoline | |
 Engine details ... |
| Hart-Parr 40 Transmission | |
| 2-speed gear | |
 Transmission details ... |
| Hart-Parr 40 Power | |
| Drawbar (claimed) | 22 hp 16.4 kW |
| Belt (claimed) | 40 hp 29.8 kW |
| Drawbar (tested) | 28.23 hp 21.1 kW |
| Belt (tested) | 46.40 hp 34.6 kW |
 Performance test details ... | |
| Mechanical | |
| Two-wheel drive | |
| Manual steering | |
| Open operator station. |
| Photos | |
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 Hart-Parr 40 photos... | |
| Dimensions & Tires | |
| Weight | 7500 lbs 3402 kg |
| Front tire | 28x5 |
| Rear tire | 52x13 |
 Full dimensions and tires ... | |
| 40 Serial Numbers | |
| 1923 | 70001 |
| 1924 | 70020 |
| 1925 | 70095 |
| 1926 | 70251 |
| 1927 | 70491 |
| Final | 70500 |
FAQ: How to read a serial number table. | |
| Belt Pulley | |
| Diameter | 14 inches 35 cm |
| Width | 9 inches 22 cm |
| RPM | 800 |
| Speed | 2750 ft/min 838.20 meters/min |
| Page information | |
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| Peter Easterlund - owner/author | |
| Email: Peter@TractorData.com | |
| Updated on December 5, 2020 |