O-Gauge Steamer
NAXJA Forum User
- Location
- Colorado Springs, Colorado
I am having an issue whereby the volt meter in the cluster drops just below the 14V mark. I confirmed the voltage to be 13.2 so...
I lightly rapped the alternator with a long drift and the voltage promptly went back the the 14.2 it needs to be.
Verdict?
There is, at the least, one of the brushes that is not staying completely in contact with one of the slip rings in the unit.
Solution?
My replacement alternator will be here on the morrow and that will take care of the issue at hand.
Theory...
Over time, carbon dust builds in the brush holders that will eventually lead to a brush loosing contact with the slip ring. The carbon interferes with the spring being able to hold the now shorter than optimum brush in contact with the slip ring. The "proof" of the failure is to gently rap the alternator and look for the voltage to return to normal levels.
If I can remember to, I will take the alternator apart and photograph what I find.
I lightly rapped the alternator with a long drift and the voltage promptly went back the the 14.2 it needs to be.
Verdict?
There is, at the least, one of the brushes that is not staying completely in contact with one of the slip rings in the unit.
Solution?
My replacement alternator will be here on the morrow and that will take care of the issue at hand.
Theory...
Over time, carbon dust builds in the brush holders that will eventually lead to a brush loosing contact with the slip ring. The carbon interferes with the spring being able to hold the now shorter than optimum brush in contact with the slip ring. The "proof" of the failure is to gently rap the alternator and look for the voltage to return to normal levels.
If I can remember to, I will take the alternator apart and photograph what I find.