All gasoline engines have a system to relieve pressure and fumes in the crankcase/cylinder head area. This (in old engines) was a road draft tube with a liquid vapor separator at the top of it. This allows combustion gasses, condensation, and oil vapors to be expelled down and out. Some manufacturers used a passive system to draw combustion gasses into the air cleaner (after the cleaners filter so combustion gasses were directed into the intake. The use of Positive Crankcase Ventilation (PCV) was introduced as early as the 1950s but was uncommon until environmental laws required combustion bypass gasses to be burnt. I am sure that the tractor has one of these systems, probably either a road draft type or a Passive air intake device/connection. Jim
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Today's Featured Article - A Farmall Story - by Ed Meadors. The year was 1978. Our young family had recently moved to rural Chesapeake, Virginia to a plot of land which would finally allow us to realize our dreams of a huge garden, critters and more lawn and pasture than we would ever use! We needed a TRACTOR; not a riding mower or tractor wannabe, but a real TRACTOR. The answer to our needs materialized in the form of a '44 Farmall A, complete with cultivators, discs, single plow, a 5ft.Woods belly mower and one, mounted spare 9.00x24 rear wheel.
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