The Early Hart-Parr Tractors

In 1901 Hart-Parr began production of their first tractor. It was rated at 17-30. The 17-30 models were built until 1906

Production of the 22-40 began in 1903 and went through 1907. By 1908 it had evolved into the 22-45. This change was due to an increased compression ratio. Production of the 22-45 lasted until 1911.

In 1908 Hart-Parr built a 4-cylinder model rated at 40-80 horsepower. This machine was too large and complicated for the average customer. Only 10 of them were built and none are known to exist today.

The 15-30 was the first model built by Hart-Parr that was intended to be a smaller tractor. The first year the tractor equipped with a horizontal engine and a single wheel. This was not a successful tractor resulting in a recall. The next model used a vertical engine and was built until 1911.

The 20-40 replaced the 15-30 in 1911 with some minor improvements. The only known example of this model resides in the Floyd County Historical Society in Charles City, Iowa. It was built from 1911-1914.

The 30-60 was an updated model of the 22-45 and was so successful that it was nicknamed “Old Reliable”. This model was built from 1911-1916.

While the 30-60 was in production, Hart-Parr developed their largest model, the 60-100. This was also a 4-cylinder model but it never went into production. It is believed there were only one or two built.

The 12-27 was also a small model of the early Hart-Parrs using a tricycle configuration but with two small front wheels. I used a single cylinder vertical engine. In 1914 the engine was bored out and it became the 18-35. It was also known as the Oil King. The Oil King was built until 1919.

In 1914 Hart-Parr made an unsuccessful attempt to build a completely redesigned small tractor. It was a 3-wheel unit with the single wheel being in the rear with the operator sitting off to the side of the wheel. It was known as the Hart-Parr Little Devil. It was rated as a 15-22. There were many problems with the tractor and it was eventually recalled by the company. Only a few models still exist today and one is in the Floyd County Historical Society in Charles City, IA.


Serial Numbers:

Model 17-30
1901 Described as No. 1
1902 Described as No. 1
1902 Described as No. 2
1903 1 206 - 1 219
1904 1 339 - 1 340
1905 1 349 - 1 347
1905 1 420 & 1 422
1906 1 435 - 1 444
1906 1 446 - 1 454

Model 22-40
1903 1 222 - 1 245
1904 1 306 - 1 338
1904 1 341 - 1 345
1905 1 364 - 1 388
1905 1 390 - 1 393
1905 1 415 - 1 419
1905 1 421
1905 1 423 - 1 434
1906 1 445
1906 1 455 - 1 604
1907 1 605 - 1 810

Model 22-45
1908 1 811 - 2 014
1909 2 025 - 2 324
1910 2 432 - 3 310
1911 3 311 - 3 811

Model 30-60
1911 3 812 - 4 111
1911 4 212 - 4 300
1912 4 301 - 4 711
1912 4 814 - 4 913
1913 4 916 - 5 415
1914 5 416 - 5 480
1915 5 481 - 5 674
1916 5 675 - 5 715

Model 40-80
1908 2 015 - 2 018
1909 2 019 - 2 024

Model 15-30 (Horizontal Cylinders)
1909 2 325 - 2 331 (Recalled)

Model 15-30 (Vertical Cylinders)
1910 2 332 - 2 403
1911 2 404 - 2 431

Model 20-40 (Vertical Cylinders)
1911 4 112 - 4 211
1912 4 714 - 4 736
1913 4 737 - 4 793
1914 4 794 - 4 813

Model 12-27
1913 5 816 - 5 934
1914 5 935 - 6 039

Model 118-35
1914 6 040 - 6 063
1915 6 064 - 6 153
1916 6 154 - 6 199
1917 6 200 - 6 215
1917 8 201 - 8 358
1918 8 359 - 8 400
1919 20 001 - 20 050

Little Devil (15-22)
1914 6 219 - 6 244
1915 6 245 - 6 743
1916 6 744 - 6 943