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#1
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has anyone succeeded in repairing old-style driver's vacuum lock cylinder?
this tiny part for early chasses (1168000473) is twice as expensive as the later-style one. before i buy a replacement, has anyone taken one apart?
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'77 240D, 504H, OM617.952, etc. |
#2
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I didn't write this guide personally, just posted it on behalf of someone over on benzworld who did this. He reports it is working well a year later.
https://www.ifixit.com/Guide/Repairing+Mercedes+W123+Door+Lock+Master+Vacuum+Switch/20887
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1979 300D 040 Black on Black - 1985 300D Maaco job (sadly sprayed over 199 Black Pearl Metallic) on Palamino http://i.imgur.com/LslW733.jpg The Baja Arizona Oil Burners Send a message if you'd like to join the fun Left to Right - UberWasser, Iridium, Stuttgart-->Seattle,, mannys9130 Visit the W123 page on iFixit for over 70 helpful DIY guides! |
#3
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Quote:
So, no parts are required to rebuild it... I'd try spraying brake cleaner in it, and moving it around a lot then dribble some silicone spray in there to lube it up...
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#4
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Seemingly, yes, nothing more than new o-ring/seals.
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1979 300D 040 Black on Black - 1985 300D Maaco job (sadly sprayed over 199 Black Pearl Metallic) on Palamino http://i.imgur.com/LslW733.jpg The Baja Arizona Oil Burners Send a message if you'd like to join the fun Left to Right - UberWasser, Iridium, Stuttgart-->Seattle,, mannys9130 Visit the W123 page on iFixit for over 70 helpful DIY guides! |
#5
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If you look closely at the pics in the link you provided, it appears to be not a simple o-ring, but a seal with a lip. I have not taken one apart so I am not 100% certain. But from my recent work on installing keyless entry and observing how the master vacuum switch behaves to vacuum, leads me to believe it is not an o-ring.
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85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked |
#6
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I think I'm combining two sets of information on this. The person who wrote this guide re-installed the old seals after cleaning and found it to be sufficient. Someone else replaced the seals with o-rings, and found them to work adequately. They are over on benzworld as well. They bought a bunch of o-rings that they said were just the right size, and then offered to mail them for free to anyone who asked, since they had lots of extras. A nice gesture...
Anyway I have two of these o-rings in hand now thanks to him. I guess I'll try them sometime, if the need arises. I only learned about the possibility to refresh the old one AFTER already buying my new one for my '79. My '85 uses the new, cheaper style.
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1979 300D 040 Black on Black - 1985 300D Maaco job (sadly sprayed over 199 Black Pearl Metallic) on Palamino http://i.imgur.com/LslW733.jpg The Baja Arizona Oil Burners Send a message if you'd like to join the fun Left to Right - UberWasser, Iridium, Stuttgart-->Seattle,, mannys9130 Visit the W123 page on iFixit for over 70 helpful DIY guides! |
#7
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Just cut one of mine open that was leaking, they aren't just o-rings but seals as was said, I am not sure if an o-ring could do the job, but it is worth a try.
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#8
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great info everyone. it's definitely time to try the o-rings. thanks!
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'77 240D, 504H, OM617.952, etc. |
#9
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each of the seals has a kind of step in it so that they fit over the transitional edge between two shaft diameters, and then a soft flange at the end. hard to replicate this with o-rings. it seems like the most prudent thing might be to use several in two sizes - both smaller than what i had on hand. hmmm....
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'77 240D, 504H, OM617.952, etc. |
#10
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if the generous o-ring donor can be identified i will definitely offer to pay for postage....
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'77 240D, 504H, OM617.952, etc. |
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