Posted by Steve@Advance on August 22, 2022 at 19:16:55 from (99.190.215.237):
In Reply to: Alternator questions posted by grandpa Love on August 22, 2022 at 18:29:24:
Go on Youtube, look up 'Rebuilding a Delco Alternator', I'm sure there are plenty of videos.
Usually the diode trio goes out. That will reduce the output.
The rectifier can burn out, usually a result of connecting the battery backward or running with a dead/shorted battery.
The windings can also short or burn out, also from running with a dead battery or being packed with dirt and under heavy load, or too small alternator for the demand.
Brushes, my theory... If the brushes are worn to the point of being gone, so short they popped out of the holder, there is a reason, a shorted stator overloaded them. Every time I have encountered this, new brushes did not fix it!
You do know the trick to get the brushes back in? A straightened-out paper clip through the hole to hold them in.
Also pay close attention to where the screws and insulating washers go that hold in the regulator and brush holder. They must go in the right places. Often that is why an alternator is not working, someone has had it apart before!
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