Pagoda SL Group
W113 Pagoda SL Group => Drive train, fuel, suspension, steering & brakes => Topic started by: Esmo on February 22, 2023, 16:05:05
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Hi My 1967 SL230 automatic,has been set up by a specialist who tells me that the idle speed control 000 072 05 00 has failed and any used ones are not worth it as it’s a common problem . Having checked MB main dealer , SLShop ,SLS all confirm not available . Niemoller in Germany do offer a rebuild 8weeks and over a £1000 including tax exc shipping . My question is does anyone know of a rebuild service in the U.K. ?
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I can probably make yours work again.
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What you call "idle speed control" is also called "constant speed solenoid" or CSS. I see you are a full member, so here in the Tech Manual you will find a part number for an interior seal. See if it is still available. https://www.sl113.org/wiki/Restricted/Linkage-tour#ConstantSpeedSolenoid
How do these work internally? They get the signal from the auto transmission and/or air conditioner, then what pushes the rod out? Is there an electromagnet and spring inside? I would think a bimetallic spring heated by electricity would not have the necessary force.
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Might just be worth testing it yourself, easy to confirm if it's working electrically or not, good advice on this post
https://www.sl113.org/forums/index.php?topic=451.0#:~:text=The%20solenoid%20works%20electrically%20through%20contacts%20of%20the,it%20might%20just%20be%20the%20idle%20switch%20adjustment.
How do these work internally? They get the signal from the auto transmission and/or air conditioner, then what pushes the rod out? Is there an electromagnet and spring inside? I would think a bimetallic spring heated by electricity would not have the necessary force.
it's a solenoid, so, an electromagnet, attracts or repels the pin/rod
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So, I looked up solenoid and found this basic, easy to understand video: https://www.tlxtech.com/articles/solenoid-101-what-is-a-solenoid
Why would that fail? All I can think of is moisture gets in there and corrosion happens. Any other reasons they fail? Such a simple device. Oh, and the moisture issue goes back to what I found in the Tech Manual about a seal.