Posted by rhtx55 on August 27, 2011 at 12:13:12 from (207.119.49.64):
In Reply to: Super A radiator blinds posted by David Lampman on August 27, 2011 at 11:29:58:
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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