Re: 1941 Farmall A Question

Posted by Roger Mills on January 05, 2007 at 06:37:10 from (71.213.68.25):

In Reply to: 1941 Farmall A Question posted by Old Bob on January 05, 2007 at 06:22:42:

If it is a '41 A it was a mechanical temp gauge, not electric and the "wire" is a thin tube from an expansion bulb. If it is broken or crushed it must be professionally rebuilt or replaced as a unit. They are filled with a liquid that expands when heated and the gauge is actually a pressure gauge that reacts to the expanding liquid. Today they use a blend of freons to calibrate the scale and are not adjustable in the field.

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