[W126 Coupe] Air conditioning Issues

[Dick Spellman]

Hi Cal:

A short list of questions that need answers first...

What components did you replace on the system prior to evacuation and 
recharge?
What refrigerant type are you using?  Did you add any oil, how much, 
which type?
 Did you add a leak detection dye of any kind on the recharge?
What are you using to determine the correct pressures and to confirm 
that you have no leak?
Do you have a set of gauges?
Where your 83SEC is outfitted with the GM/Harrison A-6 compressor, can 
you see that the clutch is engaged when cooling is called for?
Does it cycle with any frequency or stay engaged at all times?
Can you feel cold low pressure hose up on the driver's fender or see a 
sweating hose when the ac has been on for a while?
What is the cabin's center vent temp?
Have you replaced and confirmed that the vacuum elements are all working 
properly for the ACC?

Happy to help, but feel like I've done this more than a few times and 
wish the questions were answered before anyone asks for help to make the 
process of troubleshooting quick and easy.  As for the 86 with the Denso 
compressor, the same questions apply but the compressor service is 
different if that is what is determined to be needed.

Regards,

Dick
You can call me today if that's a help at 508-641-8477 EST

.Calvin Young wrote:

>I would appreciate some help on my Air Conditioning.  I evacuated the system
>and installed an alternative to Freon, but the system still is not cooling.
>Initially I got some cooling, but system does not work like it is supposed
>to.  Any suggestions?
>
>A mechanic I spoke with mentioned that the system orifice tube is probably
>clogged except I read in the archives that the MB system does not have one.
>I read  a post from Satish, Sat Apr 17 1999 - 23:41:34 EDT, that suggested
>procedures that I do not really feel qualified to make since I do not know
>where some of the parts are located.  Does anyone have the written
>procedures he referred to that would appear in the Star?  Are there pictures
>attached?  If so, I would like to obtain a copy.  
>
>Any other help would be appreciated.  Good news is that I evacuated the
>system and there does not seem to be a leak.  Recharge of system simply does
>not improve system. 
>
>I am working on my 83 SEC, but the 86 has similar issues, only not as bad
>even though the systems does have leaks that I need to repair.  I really
>would like to do this right.
>
>Cal
>
>
>The MB Coupes Website!
>W126 SEC Mailing List
>Postings remain property of MB Coupes, L.L.C.
>
>  
>