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Super A radiator blinds

D

David Lampman

Member
Hi again guys,
On a parts tractor I acquired a few years ago, it had what I can only describe as like venetian blinds for the radiator. I assume it's to allow you to regulate the temperature by closing off the air flow. My Super A has the non-water pump cooling system. Is this thing for water pump systems or for non water pump systems? What is the advantage of using it? Might it be for cold weather operation?
Dave
 
They are called radiator "shutters". They were popular in the 30's & 40's when tractors were ordered as "distillate" or "all fuel" tractors. They had a small 1 gallon tank that held gasoline. The tractor would be started on gasoline and warmed to operating temperature then switched over to the distillate tank. The engine had to be run on distillate at a certain high operating temperature to completely burn this fuel, unlike gasoline, if the temperature was not kept up, the unburnt fuel would flow past the rings and dillute the engine oil, thus causing bearing failures.
This is why most "all fuel" tractors had two petcocks on the oil pan, in the morning you would open the lower one and drain the distillate which was lighter than engine oil off ( around 1 quart) close it, then open the top one & add engine oil until it started dripping out of the top petcock, close it & you were good for the day.

These shutters were also a popular option in the northern states to keep the engines warmed to operating temperature while operating in the wintertime.
 
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