Hot Electrical Smell, Seems to be Excessive Arcing?
by Shawn L
6 gal oil-free Bostitch pancake compressor
6 gal oil-free pancake compressor. About 4 years old, used infrequently.
Air issues are fine but recently it's begun to smell really hot electrically.
I opened the motor cover and powered it on. Seemed there was excessive arcing between the brushes & commutator although I don't know how much there should be. The commutator was quite dark. I polished it gently back to bright look and verified all seemed to be fine with the brushes. Powered it back on and the commutator was quickly darkened and the arcing was the same amount.
Hot electrical smell is reduced but I've only had the motor on 20-30 seconds.
Commutator is hot; sizzles when touched with a wet finger.
Would like to get input here first before running long and possibly damaging it?