If that is an old regulator, give it your best to save it.
Before adjusting try filing the contacts with a point file. It's a very thin special file, probably have to order one.
The field contacts constantly arc when the voltage gets up to the set level, so they have a hard life. The arcing causes the surfaces to pit and burn, the file will dress the surfaces if there is enough plating left to dress. Don't use sandpaper!
That is the problem with the new regulators, the alloy on the contacts is very expensive, they shortcut with lesser materials.
Filing might correct the problem, especially if there is a point burned on one of the surfaces. File first, clean with brake or carb or contact cleaner, then adjust the voltage if necessary.
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Today's Featured Article - Stories From Old Farmer - by K. Pratt. Old Farmer, a.k.a. Dale Jensen began posting messages to our discussion forums at the grand age of 75. With extensive knowledge of farming and tractors, he valued the past and the ways that went with it. He shared these values with us until shortly before his passing. I spoke with Dale in his last days and requested his permission to share some of his stories with the readers of our magazine. He agreed, and provided the
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