A Ford 9N
The first tractor of the series was the 9N, the first tractor to have both three-point hitch and a rear power take-off (PTO).
The 9N was first demonstrated in Dearborn, Michigan on June 29, 1939. Its model name reflected a model-naming system using the last digit of the year of introduction and a letter for product type, with "N" for tractors (hence 9N).
Like the Farmall, it was designed to be a general-purpose row-crop tractor for use on smaller farms.
An extremely simple tractor, the 9N was fitted with the Ferguson system three-point hitch, a three-speed transmission, and featured footpegs instead of running boards.
The 9N's relatively tall and wide-spaced front wheel design resulted in somewhat sluggish steering and reduced maneuverability compared to competing machines such as John Deere's Models A and B, and the Farmall "Letter series".
The 9N had variable front track, a valuable feature for row-crop cultivation, via front half-axles that could be slid in and out and pinned in place.
It also had variable rear track via the reversible offset of the rear wheel design (flipping the rear wheels around 180°, moving the formerly inboard side to the outboard side, widened the rear track).
Uniquely, the exhaust was routed underneath the tractor, much like an automobile.
All 9N tractors were painted dark grey.
This tractor has a rear PTO, which could be used to drive three-point or towed implements.
The Ferguson hitch was designed to solve some of the problems found in the earlier Fordson tractors, such as flipping over if the plow hit an obstruction.
The upper link also would adjust the hydraulic lift to use the drag of the plow to improve traction. This was known as draft control.
The original 9N engine was a four-cylinder engine and was designed to be powered by distillate fuels.
The engine shares the same bore and stroke sizes as one bank of the Ford V8 automobile engines.
A few standard Ford auto and truck parts, such as timing gears and valve tappets, were used in this engine.
The ford 9N engine was a side-valve, four-cylinder engine, with a 3.19-inch (81 mm) bore, 3.75-inch (95 mm) stroke, providing a displacement of 120 cubic inches (2,000 cm3).
The transmission was the standard three-speed.
The finished tractor weighed 2,340 pounds (1,060 kg), and initially sold for US$585.
This was an advantage, as tractors from other manufactures cost almost twice as much.