In the early years, Farm Tractors were referred to as
*Note: These Hart-Parr Tractors are listed by their tractor
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)
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)
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)
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)
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) ? ? ?
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
Charles Hart and Charles Parr were credited for
Hart-Parr built the 1st Row Crop tractor in 1930.
They are also credited with introducing the word
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.
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.
Also the large Hart-Parr and small Oliver on
The view also shows the choke wire position
Exceptions are the dual front wheels, the indi-
You will also notice the rear wheels have an
Hart-Parr Tractor Series Paint Codes
Many Misc. Tractor Parts Files .pdf
Dudley Diebold's Toplands Farm
Double D Living History Farm maintains the
© 2011 ~ 2022
site was designed built and is maintained by
|