[Vwdiesel] Alternator mix and match

[MLightner]

Date: Tue, 23 Jan 2007 11:54:31 EST
From: LBaird119 at aol.com
To: vwdiesel at vwfans.com
Subject: Re: [Vwdiesel]Alternator mix and match 

>  Sounds like you're on the right path but I'd suspect a 
>different amperage of alternator could just as easily 
>have different rotors(?) as well as stators.

Maybe just wishful thinking, but they don't have anything obviously different, including the size of what little wiring I can see, and since not much current has to run through
the rotor, it maybe that the same sized one is still used for higher current alternators At any rate, the 65 A armature paired with the 90 A stator seems to work as well as the original combo, ie , it's charging the battery at around 13.5 VDc; plus, it hasn't eaten another belt yet :) 

>  How about just using new bearings?  

That was the original plan, but I couldn't find the rear bearing locally, so instead I swapped the stator windings assy. and once I get the new bearings installed on the old rotor, I'll swap everything back, then get some new bearings for the 65A one and also add a W terminal to it.  

>I wouldn't go to all 
>the trouble of tearing one down just to put some "better" 
>used bearings in there.  

It ate two belts in two weeks, I had to do something and, since the units both came apart without much trouble, that seemed the least painful way to go without having to leave the car parked again for a couple days.  

>If things are worn sloppy how about 
>a little JB weld to tighten up the bearing to case fit?

I like that idea, I was thinking along those lines.

> I had a good 90A with a spun bearing surface on the shaft.  I'd 
>intended to have it turned and a smaller ID bearing put in.  
>Sure enough the local rebuilder has the bearings in stock.  
>One of the uncles on the orchard had decided it needed 
>thrown away.

Ouch, some people have no idea of the value of good junk  :)