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Old 07-29-2007, 12:36 PM
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Default Alternator, Bearings?

I think there is an alternator fairly common that has a bearing built into the back of the case I think, not removable. Anyone know which this is?
I am thinking about buying a barrel of used/junk alternators for a couple bucks each. Should be good practice for anodizing and powder coating now and sellable later.

What to do if the rear bearing can not be removed I am not sure about. I should probably avoid that one? Will anodizing the case or baking it destroy that bearing? I don't think it would be good for it.

I'm wanting Ford, GM, Dodge types to work on, I think it was one of those that had that bearing perhaps, anyone know which one?
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Old 07-30-2007, 12:02 AM
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Default Re: Alternator, Bearings?

Even with my limited experience with alternators, they've all had bearings of one type or another and were removable. As far back as 1919 too! And yes, baking will burn the grease and seals out of them. Remove the bearings and electronics before any work.
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Old 07-30-2007, 12:34 AM
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Default Re: Alternator, Bearings?

Yes, I take a lot of them apart for projects and parts.
Most alternators have a pressed on bearing on the armature shaft, front and rear, but that one I was asking about is considered a non-replaceable bearing but I forget exactly why. Maybe a needle type bearing or the way it's made or pressed into the case?
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Old 07-30-2007, 12:37 AM
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Default Re: Alternator, Bearings?

I've been inside quite a lot of Ford alternators over the last 3 decades, and never had any trouble removing/replacing the bearings in them. I've been inside a few Mopar alternators and don't recall any without replaeable bearings. Dunno about GM/Chevy... they irritate me too much and I stay away as best I can.

Even cheap **** alternator with non replaceable bearings, you should be able to plug/mask off the steel bearing part with a little effort and anodize the rest.

I've had good luck using rubber cement to mask off steel inserts or fittings in parts to be anodized. Let it dry good first...
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Old 07-30-2007, 01:38 AM
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Default Re: Alternator, Bearings?

I haven't run across that yet either. May be like the late model Dodge truck front wheel bearings. They are non servicable not because it can't be done but because Chrysler has it setup with the bearing companies for them not to have the bearings available to the public. A Timken bearing at that. Don't you just love all the proprietary hogwash.
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Old 07-31-2007, 11:31 AM
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Default Re: Alternator, Bearings?

SSWEE

You may have a point there. I think it was my 77 or 78 Tornado (last year for the big ones) that I could not buy bearings for the front spindle. Dealers and everyone said it was made as a unit and bearings could not be replaced. I did though
Pressed them out myself, had a friend working at Timken bearing pick me up a new set and I pressed them back in myself. Was a common bearing too I found out after he run the numbers for the Timken bearings.

Maybe that alternator bearing is the same type deal? I know I had one once even the rebuild shop told me it was not replaceable and to get a new alternator, can't remember what car that was though.
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