Author Topic: crank pully for installing A/C  (Read 4692 times)

n/a

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crank pully for installing A/C
« on: June 17, 2003, 11:37:29 »
 :?: Hello I am in the early stages of installing an A/C in my 66 230 sl
I have acquired most of the pieces necessary but i am missing the crank pully with the additional belt slot.
if anyone can help me locate one it would sure save the day.
thanks in advance. :?:  :?:

Jerry P.

n/a

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Re: crank pully for installing A/C
« Reply #1 on: June 17, 2003, 18:55:06 »
Bud's Benz has new ones in stock for about $80.

pkiefert

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Re: crank pully for installing A/C
« Reply #2 on: June 18, 2003, 22:43:10 »
FYI, I believe someone on Yahoo had opined that the 4 main bearing 230 motor did not have sufficient strength on the front of the crankshaft for the additional load of A/C

ja17

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Re: crank pully for installing A/C
« Reply #3 on: June 20, 2003, 22:05:59 »
Good point Phil,
 These early six cylinder engines with the three bolt pulley attachment were more suseptable to problems. A crankshaft pulley/vibration dampner assembly which comes loose can ruin the crankshaft. I know many of these engines with AC which never had problems and I know some that did. It is most critical that everything be correctly assembled on the M127 (230-SL) engine when installing the multiple crank pulley. Be sure to correctly torque the crankshaft bolt and the three pulley bolts. The correct strength hardware should be used. The factory shop manual reccomends using some thread locking compound (Locktite or such). Modifications and upgrades to the fastening hardware and re-assembly in detail is covered in section 03-10/1 to 03-10/4 of the Workshop Manual "Passenger Cars Starting August 1959" This section covers vibration dampners and counterweights on six cylinder models from 220 b to 250-SL. It looks like there is an improved crankshaft "strech bolt" and washers which can be used to prevent problems. I can scan the information for you if you do not have it.


Joe Alexander
Blacklick, Ohio
« Last Edit: June 21, 2003, 04:59:09 by ja17 »
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

Naj ✝︎

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Re: crank pully for installing A/C
« Reply #4 on: June 21, 2003, 01:19:34 »
Jerry,
One other mod was that 3 big cupped washers were used on the main balance weight bolt instead of only one. You may already have these on as my '65 230sl had them on when I had a look.


naj
'Kloines Scheisserle'
65 230SL
68 280SL
68 280SL

ja17

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Re: crank pully for installing A/C
« Reply #5 on: December 12, 2003, 21:06:42 »
Hello George Des,
I am bring9ing this topic to the front page so you can review the information. Maybe Jerry can update us on his progress also.

Joe Alexander
Blacklick, Ohio
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

Benz Dr.

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Re: crank pully for installing A/C
« Reply #6 on: December 13, 2003, 00:06:29 »
New what? Surely not a crankshaft for 80 bucks.

  In all fairness some break and some don't. I suppose proper instalation over the past 40 years makes a big difference. The 220SEb uses the same crank and I've seen a number of them break or come loose so it's not an isolated problem.
On the other hand I've never seen the 250 or 280 fly apart like that so I guess the new style crank and screw with cupped washers did the trick.

I'd inspect the end of the crank carefully and use the new style parts if they fit. I say that bcause I've not done that and don't know for sure.

Dan c

Daniel G Caron
1966 230SL 5 speed, LSD, header pipes, 300SE distributor, ported, polished and balanced, AKA  ''The Red Rocket ''
Dan Caron's SL Barn

1970  3.5 Coupe
1961  190SL
1985   300CD  Turbo Coupe
1981  300SD
2013  GMC  Sierra
1965  230SL
1967 250SL
1970 280SL
1988 560SEC