You might try cleaning the contact points on the voltage regulator. I had the same thing happen - no charge until I cleaned the contact points. Use a business card or 1500 grit sandpaper if you have that. Do NOT use a file, as that's too aggressive. After cleaning my generator (which I rebuilt and tested) charged the battery. It does need to come off idle a bit before it shows a charge on the ammeter.

There's a specific procedure for adjusting the regulator, requiring both an ammeter and a voltmeter. It's outlined in the shop manual.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.