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Thu Mar 18, 2010 12:54 pm

I recently replaced the brushes on the generator of my '70 Squareback, but now when the car is idling, it makes a horrible screeching noise, seems to come from the gennie - any ideas what I should do?

Thu Mar 18, 2010 1:26 pm

Make sure your crank pulley is tight.....

Thu Mar 18, 2010 5:34 pm

Your generator has a mark on it that MUST meet up with the "dot" on the gen stap. If not the cooling air isnt going into the gen, but to the side of the hole.... Your gen may be overheating because of this. Another easy way to tell is your post's for the gen should be pointed toward the driver side of the vehicle. Hope this helps.

Thu Mar 18, 2010 6:16 pm

Did you turn the armature and re-surface it when you put the new brushes in?
If not, could be that the brushes just need to seat in on the old commutator.

Thu Mar 18, 2010 8:28 pm

Could also be dried bearings in the gen.

Thu Mar 18, 2010 8:37 pm

KTPhil wrote: Could also be dried bearings in the gen. And how does one take care of that? I think I have it going on in the fasty.

Sat Mar 20, 2010 7:22 am

notchback wrote: KTPhil wrote: Could also be dried bearings in the gen. And how does one take care of that? I think I have it going on in the fasty.

Replace the bearings. Jim Adney has them in stock, and sells them cheaper than my local bearing house. :shock:

Sat Mar 20, 2010 9:12 am

I got by for about two years by cleaning and regreasing the bearings. But they eventually totally gave up the ghost and I found replacements.

Sat Mar 20, 2010 9:29 am

Bearings are off the shelf 6202 bearings.

Sat Mar 20, 2010 9:29 am

We replaced them on my son's car 2 years ago. Man, the old ones were so noisy that we thought a main bearing in the engine was bad. Took the belt off, and the noise went away. I knew right then what the problem was. Took us about an hour to replace them. Cleaned up the armature while we were in there as well. Pretty easy to do. I guess that's a plus for keeping the generator. :wink: