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amp meter

  1. 140 Amp Meter not moving - how to check?

    Hydrostatic Drive Tractors
    Hi - I had thought my amp meter on the dash of my '73 JD 140 was fine, but now notice it is not moving....and probably never did since i got it. How do I check it and possibly repair it? This tractor sat outside for 2 years....maybe just a little corrosion or something? Mulit meter...