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A/C question 900 1992

posted by  patsusedparts on  Sun May 2 14:04 CST 2004
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Long build up to a couple simple questions - please bear with me. I am not a Volvo guy. I have been mostly GM for the last 20 years and have done several repairs and refits 134a etc. on GM cars. I am helping a friend repair the AC in a 92 900 series station wagon with Turbo. Prior to his owning it, it was converted from R12 to R134a and I believe it was done with the Volvo kit. It has the factory fill fitting, but the 134a low side fitting has been mounted to the drier anyway. In researching Volvo AC I find that Volvo moved the factory location of the orifice tube from the evap inlet itself to the middle of the line from the the condenser. This was right around the time this car was built, I think.

So we got a new acc/drier, a VOV, and the line that was leaking, as well. In the process of getting it apart I found and removed the orifice in the mid tube location, as expected. However, I also see what appears to be another one in the evap inlet. So here's the question(s).....

Is it possible that the evap inlet item is some type of "filter only" piece to protect the compressor? (I haven't removed it yet) I'm inclined to pull it out and leave it out, using only the VOV in the mid tube location. Any suggestions? Hints?

And finally, I read that some retrofitted Volvos have no High Side fitting. I assume this is one of them, so my plan is to charge (after evac and leak test) recharge it with 950 grams and just leave it at that. Is there something I am missing to read the high side during charging?

Thanks in advance for any answers you can provide.






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