The Model H 18-36 HART-PARR

By Staff
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Box I8, Route i Ryder, ND 58779

The 18-36 Hart Parr tractor tested in Nebraska in 1926 was the
model G, the two speed model that was built in 1926 and 1927.
Tractor number 26145 was used in the test with a test weight of
7325 pounds. The maximum pound pull was 5535 pounds. This tractor
used the four cycle, two cylinder horizontal engine with the head
toward the rear. The cylinders are 63/4 x 7
inches giving it a 251 cubic inch displacement with the rated
engine speed of 800 revolutions per minute. The company rated it to
pull a four bottom plow or operate a 30 inch threshing machine.

The engine is oiled by a force feed Madison Kipp lubricator,
uses a Robert Bosch high tension magneto type
ZU4/2 and a Stromberg MB3 carburetor. The
fuel tank capacity is 34 gallons and the radiator capacity is 11
gallons. Also in the specifications it is stated that the exhaust
valve closes when the center mark on the flywheel rim is from one
to two inches passed the arrow on the magneto during the exhaust

In a 1929 Hart Parr tractor book put out by the Hart Parr
Company, Charles City, Iowa, the Hart Parr 18-36 tractor is
described as a three-fuel tractor with surplus power. In the
Nebraska test using distillate fuel the horsepower hours per gallon
of fuel was 6.50 in the rated load test.

In the above mentioned book the tractor is pictured with flat
spokes in both the front and rear wheels while the industrial model
is pictured with round spokes in both wheels. The

book ‘Progress in Tractor Power’, by Hart Parr Tractors,
the 18-36 model is also pictured with flat spokes in both the front
and rear wheels. Many 18-36 tractors at shows have the heavy cast
front wheels.

The lowest serial number I know of for the three speed 18-36
Hart Parr is 28879 while the highest number I am aware of is serial
number 90590. The three speed model began at number 28851 in 1927
and ended at number 90698 in 1930. There were 11,844 tractors of
this model built according to serial number production records.

The company specifications give the tractor weight as 6100
pounds and the sale price as $1350.

The two cylinder horizontal engines were discontinued in 1930 by
Oliver Hart Parr and the four cylinder vertical in line engines
were introduced in the tractor models such as the 17-28 row crop
and the 28-44 standard. The New Hart Parr light weight tractor was
first introduced in 1918. This two cylinder horizontal engine
tractor was produced in around ten different models or variations
of models.

The tractor pictured is owned by Don Olson of  Parshall,
North Dakota, and appeared for the first time at our show here in
Makoti in 1987. It is tractor number 90587, a 1930 model. Another
18-36 at our show is owned by Robert Helsted of Minot, North
Dakota, tractor number 90359, also a 1930 model that is beautifully

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