Check the voltage at the battery, Voltage at the generator really means very little, as it does not take into account any voltage drop in the wiring. At the battery posts, 14.2 is ideal, while up to 15V is a little hot, but will be OK.
If you do need to adjust the regulator, first make sure the ground wire from generator to regulator is clean and tight, as a poor ground will send a false low voltage signal to the regulator and cause high charging voltage.
The cover must be on the regulator when checking voltage after adjustment, as the magnetic field carried by the cover changes the regulsator setting a bit.
Another thought, what is the outside temp when you are reading this high voltage ? A battery needs higher voltage to charge at low temps, so the regulators are designed to compensate for low temp and increase charging voltage somewhat when it is cold. Once again, check the voltage at the battery posts, you may have no problem at all, as checking at the generator may well give a false high voltage reading. The voltage at the battery is what counts.
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Today's Featured Article - Fabrication (Who Me? Make it myself?) - by Chris Pratt. First of all, what are the reasons for not fabricatin your own parts? Most judgements on what should be purchased rather than fabricated stem from: Originality - If the tractor restoration is to be 100% original, it is likely that you should spend the time and money to locate the component in the used or New-old-stock market. Since this can be extremely difficult, you may want to fabricate the item or purchase a modern replacement temporarily, but eventually, you s
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