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16 ACR (Lucas alternator) Bearing replacement data

To: mgs@autox.team.net
Subject: 16 ACR (Lucas alternator) Bearing replacement data
From: Bert Palte <palte@gmx.net>
Date: Sun, 20 May 2001 17:29:47 +0200
For those who want to know:

(a) The bearings are 2 pc. 6202 zz c3

(b) To replace the bearings, you need to make (or borrow) some special tools,

      - a 1/4" hex socket to remove the rear cover (not a common size here 
in Europe)
      - a device to hold the pulley (using the two 6 mm holes) while 
removing the 22 mm A/F nut.
        (Don't try to block the fan, it will only bend).
      - a puller to get the bearings off.

(c) If you exchange the alternator for another one, you may have to adjust 
/ shift the bush in
      the rear eyelet. For an adjustment tool, a piece op pipe, internal 
dia. slightly larger
      than the outer dia. of the said bush  with a (M8) bolt, nut and some 
washers will do just fine.

(d) To replace the rear bearing, you need a soldering iron to temporarily 
remove the axial commutator
       slip ring like thingy at the end of the shaft.

       (Q: Does anyone know if the melting point of this solder is higher 
than of normal electrical
        engineers' soldering wire? I had some difficulty removing the old 
joint)

(e) Don't assume that a "rebuilt" alternator is the best option (as I did, 
initially).

      Years ago, I had a breakdown (no battery charging).
      At the time, I just replaced the carbon brushes (they were the cause 
of the problem),
      but I noticed that the bearings were bad, too.

      Now, anticipating  a longer trip, I decided  to hand over the alt. 
for rebuilding.

      The guy at the repair shop suggested that I, instead, would exchange 
the alt.
      for a rebuilt one he had in stock. So I did.
      For about $ 65 he handed me a rebuilt alt, shining like new.

      I asked him what the deposit was for the old one that I would have to 
hand in ($16)
      and, then, fortunately, I decided to keep the old one, too.

      When fitting the rebuilt one last Fri evening, I found that the 
rebuilt one was no good.
      (will give the repair shop a VERY nasty phone call coming Monday 
morning...  :-(
      So I decided to rebuild the old one after all.
      It wasn't that difficult after all.
      So now the old one is in again, working just fine.




Bert
1970 MGB

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