Author Topic: Alternator Bracket / Reinforcement / image  (Read 1848 times)

Paul Cain

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Alternator Bracket / Reinforcement / image
« on: January 31, 2020, 04:50:42 »
I am rebuilding the charging system on the new BaT 1965 230SL.  The forward bolt on the bracket to the engine block was broken off at the base. Some innovative welder found a way to get his wire welder all the way in there to weld the broken off stud to the bracket.  This lasts maybe a week.  Pretty frightening.

I got the broken of stud out and put a grade 10 hardened all thread into the block, in both original locations.

Looking closely on this image I fabricated a new -third- mounting point on to the forward face of the engine block. There was an unused threaded female boss already in the block.  We made two small brackets in the same gage as the bracket and welded it into place.  The allen headed bolt was small enough in OD to clear the harmonic balancer.

With three mounting locations and with the new one being in a separate axis, I am hopeful it will last more than a week.

Possible someone else has come across this issue?  I'd like to add this one to the list of non-factory approved solutions.

ja17

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Re: Alternator Bracket / Reinforcement / image
« Reply #1 on: January 31, 2020, 06:11:56 »
The latter W113's used a improved cast iron bracket which never fails. It can bolt right up after you change to slightly longer block mounting studs. It is also simplified in that the sequence of two rubber mountings and spacers are no longer required. Nice job on your modification. It looks like it should be the last one you need!
Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback

UJJ

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Re: Alternator Bracket / Reinforcement / image
« Reply #2 on: January 31, 2020, 15:28:41 »
Just in case you want the original:
I just bought this bracket from the Classic Center
MB# 130-155-00-35   $100.00
Cast Iron just as Joe says. I also used new studs (bel-metric)
Urban Janssen
Grass Valley, CA
1968 280 SL - 4speed manual
173 anthracite grey