Posted by Scott Swanson on February 14, 2008 at 09:36:59 from (70.91.177.45):
In Reply to: Farmall H All Fuel?? posted by Arnettbros on February 14, 2008 at 09:14:51:
What you have is an old Kerosene/Distillate burner. Gas was rationed during the war so various tractor models sported small starting gas tanks and large mega manifolds with heat shields. The tractors were started on gas (Small Tank) and then switched to Distillate (Large Tank)for field work. They had a coolant Temperature gauge to prevent engine seizure at high temp ranges. The carburetor was also designed for the exotic Distillate metering range. A Distillate carb has a small petcock to drain the carb if the engine killed or it was accidently turned off with distillate in the running system. Tractors could not be started on Distillate. It is not combustible enough at regular air temps. That is what the heat shield did, heat the manifold white hot to atomize the fuel. Gas does not need this pre-heating. There is also a shutter built in to operate in front of the radiator to restrict air flow throught the fins. Closing the shutters would cause a increase in heat rapidly to warm the engine and increase the heat of the manifold to the detonation temperature of Kerosene or distillate.
Regular gas can be ran throught the distillate tractor but the head is lower compression and the tractor has less power than its gas cousins. A gas tractor is denoted in the serial number with a X1.
While we were bombing Germany and Japan, farmers were burning distillate in their tractors to feed the War effort. You have a piece of that history under you whenever you drive your tractor.
I would have to also say you probably have a cast Iron Shifter Knob. Rubber and Aluminum were being used to build planes.
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