If it indicates a significant charge while you run the tractor, then you've got a bad battery.
If it indicates a discharge while you run the tractor, then the alternator is not working or it is hooked up incorrectly.
If it does not indicate anything then it is not hooked up, and your alternator probably isn't hooked up either.
Your alternator is probably toast in the last two options, regardless. Alternators don't like to be run without a battery being hooked up. They tend to run away and burn themselves out trying to charge a "0 Volts" battery.
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Today's Featured Article - A Lifetime of Farm Machinery - by Joe Michaels. I am a mechanical engineer by profession, specializing in powerplant work. I worked as a machinist and engine erector, with time spent overseas. I have always had a love for machinery, and an appreciation for farming and farm machinery. I was born and raised in Brooklyn, New York. Not a place one would associate with farms or farm machinery. I credit my parents for instilling a lot of good values, a respect for learning, a knowledge of various skills and a little knowledge of farming in me, amo
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