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Many Hart-Parr Tractors
Hart-Parr Heaven Albert City, Iowa 2015


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*Note: Hart-Parr info is limited, if anyone has more accurate
info that can be added below, send me a email at
thetractorguysct@gmail.com Thanks, George

In the early years, Farm Tractors were referred to as
"Traction Engines." In the spring of 1907, the Hart-
Parr Co. determined to find a shorter name and
eventually hit on the word, "Tractor," mean-
ing a machine for pulling or hauling.
From that time on all manufact-
urers began using the term
"Farm Tractors."


Hart-Parr Tractor Serial Numbers
Models & Specifications
1901 Thru 1937

*Note: These Hart-Parr Tractors are listed by their tractor
series number, numerical order, not by the year they
were built.


12-24 Series

Model

Year

Serial #

Units

    Mfg: Hart-Parr 12-24 Standard 26 hp

1924

(E) 36001 - 36074

73

    Plant: Charles City, Iowa

1925

(E) 36075 - 36580

505

Hart-Parr 5.1L 2 Cylinder Gasoline

1926

(E) 36581 - 37100

519

Hart-Parr 5.5L 2 Cylinder Gasoline

1926

(G) 37101 - 37189

88

Gears: 2 Forward and 1 Reverse

1927

(G) 37190 - 37900

710

Drawbar (Tested): 17.54 hp

1927

(H) 37901 - 38118

217

Belt (Tested): 26.97 hp

1928

(H) 38119 - 39686

1,567

Weight: 4,440 lbs

1929

(H) 39687 - 42278

2,591

    Original Price: $1050 (1930)

1930

(H) 42279 - 43253

974

  Total Units Built:   6,725 (Est)



15-22 Series

Model

Year

Serial #

Units

    Mfg: Hart-Parr (15-22) Standard 22 hp

1914

6219 - 6244

25

    Plant: Charles City, Iowa

1915

6245 - 6743

498

Hart-Parr 5.5L 2 Cylinder Kerosene

1916

6744 - 6943

199

Gears: 2 Forward and 1 Reverse

Drawbar (Claimed): 15 hp

Belt (Claimed): 22 hp

Weight: 6,647 lbs

    Tractor Known As The "Little Devil"

    Original Price: $1390 (1914)

  Total Units Built:  722 (Est)



15-30 Series

Model

Year

Serial #

Units

    Mfg: Hart-Parr (15-30) Standard 33 hp

1918

8401 - 9382

981

    Plant: Charles City, Iowa

1919

9383 - 11499

2,116

Hart-Parr 7.6L 2 Cylinder Gasoline

Gears: 2 Forward and 1 Reverse

Drawbar (Claimed): 15 hp

Belt (Claimed): 30 hp

Weight: 5,158 lbs

3 Plows

    Tractor Known As The "Little Gray Tractor"

    Mfg. Tractor Name: "New Hart-Parr"

  Total Units Built:  3,097 (Est)



16-30 Series

Model

Year

Serial #

Units

    Mfg: Hart-Parr 16-30 Standard 33 hp

1924

(E) 22501 - 22600

99

    Plant: Charles City, Iowa

1925

(E) 22601 - 24000

1,399

Hart-Parr 7.6L 2 Cylinder Gasoline

1926

(F) 24001 - 26000

1,999

Gears: 2 Forward and 1 Reverse

Drawbar (Tested): 24 hp

Belt (Tested): 37 hp

Weight: 5,450 lbs

    Original Price: $1350 (1926)

  Total Units Built:   3,497 (Est)



17-30 Series

Model

Year

Serial #

Units

    Mfg: Hart-Parr 17-30 Standard 33 hp

1901

Described as No. 1

1 (?)

    Plant: Charles City, Iowa

1902

Described as No. 1

1 (?)

Hart-Parr 27.1L 2 Cylinder Gasoline

1902

Described as No. 2

1 (?)

(Above Estimated)

1903

1206 - 1219

13

Drawbar (Claimed): 17 hp

1904

1339 - 1340

1

Belt (Claimed): 30 hp

1905

1346 - 1349

3

1905

1420 - 1422

2

    *First "Traction Engine" Hart-Parr Produced

1906

1435 - 1444

9

1906

1446 - 1454

8

  Total Units Built:   39 (Est) ? ? ?



18-27 Series

Model

Year

Serial #

Units

    Mfg: Oliver/Hart-Parr 18-27 R.C. 22 hp

1930

(S) 100001 - 102648

2,647

    Plant: Charles City, Iowa

1931

102649 - 103300

651

Oliver 4.6L 4 Cylinder Kerosene

Gears: 3 Forward and 1 Reverse

1031

(D) 103301 - 103318

17

Drawbar (Tested): 18.10 hp

1932

103319 - 103617

298

Belt (Tested): 29.72 hp

1933

103618 - 104038

420

Weight: 3,500 lbs

1934

104039 - 104850

811

1935

104851 - 107311

2,460

*1930-31 Single (S) & *1931-37 Duel (D) FT. Wheels

1936

107312 - 108573

1,261

1st Row Crop Tractor Ever Produced

1937

108574 - 109151

577

  Total Units Built:   9,142 (Est)



18-28 Series

Model

Year

Serial #

Units

    Mfg: Oliver/Hart-Parr 18-28 Sandard 22 hp

1930

800001 - 800459

458

    Plant: Charles City, Iowa

1931

800460 - 800963

503

Oliver 4.6L 4 Cylinder Kerosene

1932

800964 - 800984

20

Gears: 3 Forward and 1 Reverse

1933

800985 - 801050

65

Drawbar (Tested): 18.10 hp

1934

801051 - 801240

189

Belt (Tested): 29.72 hp

1935

801241 - 801989

748

Weight: 4,000 lbs

1936

801990 - 802937

947

1937

802938 - 803928

990

  Total Units Built:   3,920 (Est)



18-36 Series

Model

Year

Serial #

Units

    Mfg: Hart-Parr 18-36 Standard 40 hp

1926

(G) 26001 - 26361

360

    Plant: Charles City, Iowa

1927

(G) 26362 - 28850

2,488

Hart-Parr 8.2L 2 Cylinder Gasoline

1927

(H) 28851 - 29635

784

Gears: 2 Forward and 1 Reverse

1928

(H) 29636 - 33752

4,116

Drawbar (Tested): 32.2 hp

1928

(I) 33753 - 34566

813

Belt (Tested): 42.85 hp

1929

(I) 34567 - 35000

433

Weight: 6,100 lbs

1929

(I) 85001 - 89159

4,158

    Original Price: $1350 (1930)

1930

(I) 89160 - 90698

1,538

Export: New Zealand & Australia special use

  Total Units Built:   14,690 (Est)



20 Series

Model

Year

Serial #

Units

    Mfg: Hart-Parr 20 (10-20) Standard 22 hp

1920

(B) 35001 - 35024

23

    Plant: Charles City, Iowa

1921

(B) 35025 - 35199

174

Hart-Parr 4.6L 2 Cylinder Gasoline

1922

(B) 35200 - 35319

119

Gears: 2 Forward and 1 Reverse

1922

(C) 35501 - 35521

20

Drawbar (Tested): 14 hp

1923

(C) 35522 - 35749

227

Belt (Tested): 23 hp

1924

(C) 35750 - 35922

172

Weight: 4,440 lbs

    Original Price: $1,195 (1924)

  Total Units Built:   735 (Est)



20-40 Series

Model

Year

Serial #

Units

    Mfg: Hart-Parr 20-40 Standard 44 hp

1911

4111 - 4212

1

    Plant: Charles City, Iowa

1912

4713 - 4736

23

Hart-Parr 2 Cylinder Kerosene

1913

4737 - 4793

56

Drawbar (Claimed): 20 hp

1914

4794 - 4813

19

Belt (Claimed): 40 hp

  Total Units Built:   99 (Est)



22-45 Series

Model

Year

Serial #

Units

    Mfg: Hart-Parr 22-45 Standard 50 hp

1908

1811 - 2014

3

    Plant: Charles City, Iowa

1909

2025 - 2324

299

Hart-Parr 2 Cylinder Kerosene

1910

2432 - 3310

878

Drawbar (Claimed): 22 hp

1911

3311 - 3811

500

Belt (Claimed): 45 hp

  Total Units Built:   1,676 (Est)



28-44 Series

Model

Year

Serial #

Units

    Mfg: Oliver/Hart-Parr 28-44 STD 48 hp

1930

500001 - 503599

3,598

    Plant: Charles City, Iowa

1931

503600 - 506184

2,584

Hart-Parr 7.4L 4 Cylinder Kerosene

1932

506185 - 506211

26

Gears: 3 Forward and 1 Reverse

1933

506212 - 506254

42

1936 - 1937 High Compression

1934

506255 - 506400

145

Drawbar (Tested): 34.21 hp

1935

506401 - 507175

774

Belt (Tested): 49.04 hp

1936

507176 - 508015

839

Weight: 6,415 lbs

1937

508016 - 508917

901

  Total Units Built:   8,909 (Est)



28-50 Series

Model

Year

Serial #

Units

    Mfg: Hart-Parr 28-50 Standard 55 hp

1927

70501 - 70741

240

    Plant: Charles City, Iowa

1928

70742 - 70951

209

Hart-Parr 11.1L 4 Cylinder Gasoline

1928

70952 - 70967

115

Gears: 2 Forward and 1 Reverse

1929

70968 - 71401

433

1927 - 1928 Narrow Radiator

1930

71402 - 71701

299

1928 - 1930 Wide Radiator

Drawbar (Tested): 46 hp

Belt (Tested): 64 hp

Weight: 8,600 lbs

    Original Price: $2085 (1930)

  Total Units Built:   1,386 (Est)



Hart-Parr 30-60 Tractor
1913 Hart-Parr 30-60 "Old Reliable" Tractor

30-60 Series

Model

Year

Serial #

Units

    Mfg: Hart-Parr 30-60 Standard 60 hp

1911

3812 - 4111

299

    Plant: Charles City, Iowa

1911

4212 - 4300

88

Hart-Parr 38.6L 2 Cylinder Kerosene & Gasoline

1912

4301 - 4711

410

Gears: 1 Forward and 1 Reverse

1912

4814 - 4913

99

Drawbar (Claimed): 30 hp

1913

4916 - 5415

499

Belt (Claimed): 60 hp

1914

5416 - 5480

64

Weight: 20,100 lbs

1915

5481 - 5674

193

    Tractor Known As "Old Reliable"

1916

5675 - 5715

40

  Total Units Built:  1,692 (Est)



30 Series

Model

Year

Serial #

Units

    Mfg: Hart-Parr 30 (15-30) Standard 33 hp

1918

(A) 8401 - 9232

831

    Plant: Charles City, Iowa

1919

(A) 9383 - 13017

3,634

Hart-Parr 7.6L 2 Cylinder Gasoline

1920

(A) 13018 - 14198

1,180

Gears: 2 Forward and 1 Reverse

1920

(A) 15550 - 18474

2,924

1921

(A) 18475 - 18841

366

Drawbar (Tested): 19 hp

1922

(A) 18842 - 19125

283

Belt (Tested): 31 hp

1922

(C) 21001 - 21392

391

Weight: 5,570 lbs

1923

(C) 21393 - 21864

471

    Original Price: $1,395 (1924)

1924

(C)21865 - 22300

435

  Total Units Built:  10,515 (Est)



40 Series

Model

Year

Serial #

Units

    Mfg: Hart-Parr 40 (22-40) Standard 44 hp

1923

70001 - 70019

18

    Plant: Charles City, Iowa

1924

70020 - 70094

74

Hart-Parr 10.1L 4 Cylinder Gasoline

1925

70095 - 70250

155

Gears: 2 Forward and 1 Reverse

1926

70251 - 70490

239

1927

70491 - 70500

9

Drawbar (Tested): 28.23 hp

Belt (Tested): 46.40 hp

Weight: 7,500 lbs

    Original Price: $2,250 (1927)

  Total Units Built:  495 (Est)



40-80 Series

Model

Year

Serial #

Units

    Mfg: Hart-Parr 40-80 Standard 110 hp

1908

2015 - 2018

3

    Plant: Charles City, Iowa

1909

2019 - 2024

5

Hart-Parr 54.2L 4 Cylinder Kerosene

Drawbar (Claimed): 40 hp

Belt (Claimed): 80 hp

Weight: 34,000 lbs

  Total Units Built:  8 (Est)



60-100 Series

Model

Year

Serial #

Units

    Mfg: Hart-Parr 60-100 Standard 111 hp

1911

4000

1

    Plant: Charles City, Iowa

1912

4101

1

Hart-Parr 4 Cylinder (Vertical)

Drawbar (Claimed): 60 hp

Belt (Claimed): 100 hp

Weight: 52,000 lbs

    Largest Tractor Ever Built For Its Time

    No Production Runs - None Known To Exist

  Total Units Built:  2 (Est)




1908 30-60 Hart-Parr Oil Pull "Old Reliable"


Hart-Parr Factory
The Hart-Parr Factory, Charles City, Iowa

Charles Hart and Charles Parr were credited for
being the first successful mass production
gasoline traction engine company.

Hart-Parr built the 1st Row Crop tractor in 1930.

They are also credited with introducing the word
"Tractor" to the English language.

The Hart-Parr Company
Charles Walter Hart and Charles H. Parr met at the Univ. of Wisconsin and became very close friends. Close to the end of their college career they decided to work cooperatively on a thesis that brought about the development of their first engine.

Their thesis dealt with the limitations of early internal combustion engines and Hart-Parr developed an engine that eliminated those limitations (or most of them). They were so successful in their ideas that the Hart-Parr company was organized in Madison, Wisconsin on April 29, 1897.

Until 1901 they operated their engine factory, perfected their valve-in-head engine design, as well as a cooling system employing oil as the cooling medium.

They continued building superior engines until they needed larger facilities and because they lacked the capital to build, Hart's father financed the factory if they moved to Charles City, Iowa. The Hart-Parr Company was organized on June 12, 1901 at Charles City. Ground was broken for a new factory July 5th of the same year.

Their development of steam and gas powered tractors caused the company to grow very rapidly. By 1911 the Hart-Parr Company employed 1,100 people and tractor production was growing every year. By 1915 the company was capitalized at $2.5 million.

The 1929 merger of Hart-Parr into the Oliver Farm Equipment Company brought about the Oliver Hart-Parr "Row Crop" tractor, an entirely new model with a unit frame design and vertical engine.



Oliver Hart-Parr
18-27 Row Crop Tractors
1930 - 1937

Photo of 1930 Hart-Parr 18-27 Tractor
1930 Hart-Parr 18-27, 1st Row Crop Tractor Produced

This new Oliver Hart-Parr 18-27 Row Crop, Olivers first general-purpose tractor, went into production in February of 1930, it was the first model of three to be introduced in 1930.

Later in 1930, Oliver Hart-Parr introduced two more standard tractors, the Model 18-28 and the Model 28-44. The 18-28 and the Row Crop remained in production until 1937 when the 28-44 was transformed into the Model 90 tractor, which remained in production until 1952.

The front steel wheel was of unique design being of concave shape. This single front wheel combined with the fact that this tractor had no turning brakes, provided a challenge turning in loose soil with an implement in tow. Then late in 1930 at approximately s/n 102130, turning brakes were added to the rear axle. Many early Row Crops were field equiped with these add on turning brakes, which helped a great deal for turning.

In 1931 the dual front wheel Row Crop appeared and these tractors featured differential shaft brakes to assist in turning.

The engine in the Row Crop tractor was a valve-in-head de- sign, 4 cylinder built by Waukesha. Actually, the engine blocks cast HART-PARR into them, were built in the Charles City plant and the heads were made in Milwaukee, Wisconsin and then the blocks and heads were shipped to Waukesha for assembly and then back to Charles City, Iowa.

With the coming of the Row Crop also came the introduction of the famous "Tip Toe Wheel". This proved to be a great for traction and usually there was no problem with this style of wheel. It was a simple idea with lugs bolted on either side of a band of 9/16 wide steel. With this style, compaction was to a bare minimum without sacrificing traction.


1930 Row Crop -1
This tractors serial number is 100328 and was
built built on April 7, 1930 in Charles
City, Iowa. Notice "Tip Toe" steel
wheels with a mud scraper
behind the front wheel.

Also the large Hart-Parr and small Oliver on
front of the radiator.




1930 Row Crop -2
This picture shows the left side of the tractor
with the cast iron air cleaner cover. This
was a unique feature on the first 350
Row Crops built.




1930 Cast iron air cleaner cover -3
This shows the cast iron air cleaner cover of
which has disappeared from many of
these early row crop tractors.

The view also shows the choke wire position
and the hood decal used on the first
models.




1935 row crop -4

This is a 1935 Row Crop serial number 105340.
It is basically the same as the single
wheel models.

Exceptions are the dual front wheels, the indi-
vidual turning brakes, and an oil bath
air cleaner.

You will also notice the rear wheels have an
extra reinforcing ring put half way
between the hub & the outer
band.




Photo of  Oliver Hart-Parr Tractor Hood
Photo of Orange Red ArrowOliver Hart-Parr Audio History Tour .mp3
        ( Floyd County Museum, Charles City, Iowa 3:47 mins )





MORE HART-PARR TRACTOR INFO BELOW

All Hart-Parr Tractors Listed By Model
Photo of Orange Red ArrowTractorData Hart-Parr Tractor Series Info Here

Hart-Parr Tractor Series Paint Codes
Photo of Orange Red ArrowTTG Paint Codes Here

Many Misc. Tractor Parts Files .pdf
Photo of Orange Red ArrowTTG Parts Files Etc. Here

100 Years of University of Nebraska Tractor Tests
Photo of Orange Red ArrowFarm Tractor Tests 1903 Thru 2009 Here




Toplands & Double D Living History Farm 2015

1st Sunday In June Open House & Antique Tractor Show
( Admission Free )

Dudley Diebold's Toplands Farm
102 Painter Hill Road,
Roxbury, Ct.

Double D Living History Farm maintains the
largest collection of restored antique
tractors and farm equipment
in the Northeast.
View Toplands Farm & D & D's Living History Info




Made In The USA Button

*Note: Hart-Parr info is limited, if anyone has more accurate
info that can be added above, send me a email at
gtstoday@gmail.com Thanks, George

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