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Posted by Andy Martin on July 03, 2001 at 07:07:36 from (38.31.74.103):
In Reply to: [email protected] posted by John N on July 03, 2001 at 06:12:05:
I think the Super's all had water pumps, not thermosiphon. The water inlet tube in the radiator prevents you from seeing much flow. But a lot of flow takes place. My old JD has the big cast iron cap and with it off you can see a lot of water flowing nicely. The thermosiphon principle provides a surprisingly strong driving force, but a slipping fan belt or restrictions in the system inhibit it significantly. The tractors built without water pumps were modern equipment built by companies with good engineering departments, and were built about the time of the B-17 and 100 mph+ locomotives. These tractors were well engineered, using very modern carburetion principles and cast steel. Remember the model A Farmall was built without a fuel pump long after the F-12 was discontinued (with a fuel pump). And all the A's, B's, C's, H's, and M's had the "old fashioned" updraft carburetor after the previous generation had down-draft carburetors. I think about that improvement every time a float sticks and gas drips out of the vent hole. Where does the gas go in a down draft setup? They also are more fuel efficient than their water-pump cousins who have to expend gasoline to drive a useless water pump.
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Memories of a Farmall C - by Monty Bradley. When I was a child, my grandparents lived on a farm owned by a Mr. Walters. The crops raised were cotton and soybeans, with about forty head of mixed breed cattle. Mr. Walters owned two tractors then. A Farmall 300 on gasoline and a Farmall C, that had once belonged to his father-in-law, and had been converted from gasoline to LP Gas. Many times, as a small boy, I would cross the fence behind the house my grandparents lived in and walk down the turn row to where granddaddy would be cultivati
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