Cub Charging system-problem?

Posted by awander on September 25, 2005 at 18:25:01 from (209.74.0.8):

When I bought my '52 Cub, it had a 12V battery on it, and the generator belt had been loosened by the PO.

I put the proper battery on it, repolarized the generator, and tightened the belt. It did not appear to be charging, per the ammeter, which stayed at -10A with the ignition switch on, engine running or not.

Then ireplaced the old, rusty 3-unit regulator with an aftermarket one. Still no charging.

Last night I went through the steps listed on
the "Generator/Regu;lator Troubleshooting Flow Chart" found at

and halfway through, I noticed that the ammeter jumped up from -10 (discharge) to just about "zero". It stayed on "zero", even if I turned the lights on. After running for a while, it crept up to "+2" or so.

My question is, does this sound like something that new brushes and a cleanup of the commutator could solve? I assume that there should be more positive charge shown-though it does keep up when I switch the lights on.....

Andy Wander

Follow Ups:

• Re: Cub Charging system-problem? John T 20:17:22 09/25/05 (2)
  • Re: Cub Charging system-problem? awander 05:55:05 09/26/05 (0)
  • Re: Cub Charging system-problem? Dellbertt 21:27:34 09/25/05 (0)

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