Hi everyone, I've been enjoying driving the Mondial 8 around when I've got the time, and generally things are working great! It's a ton of fun and a crowd favorite. The one thing I do need to address so my parents can enjoy the car as well is the A/C. The original compressor is seized but at least the system holds vacuum very well. I've sourced an updated compressor to attach to the original lines and bracket, plus I found a commercial R134 refrigerant which can be used with mineral oil. The one part of the system I'm not smart enough to wrap my head around is the receiver/drier. My car has separate high/low pressure switches and all the current replacement driers only have the combination switch. What exactly do I need to do in order to make the combo switch function correctly with an older car's wiring? And yes, I know the best approach with R134 is to install barrier hose, upgrade the condenser and so on but that isn't currently in the cards. Thanks!
I would assume that both the old pressure switches would break the circuit, so your new combined switch would need to do the same.
That's my basic thinking as well, so I'm wondering if I can make a short pigtail to loop the wires for one switch, then attach the other pair of wires to the new switch.
Do you have 2 or 4 wires from the old system ? If 4 then i assume you short wires to one old switch and use the other pair through the new combined switch.
I can only reuse one of the two original switches because the original design is no longer available (except for a silly amount of money).
Are you sure that you really have 4 separate wires? Usually when there are separate low and high pressure switches, there is an "in" wire, and "out" wire and then a jumper wire between the two switches. If so, just eliminate the jumper wire, and connect the "in" and "out" wires to the new combination switch (and the polarity does not matter).
Well I'll be darned, you're right. I'll see exactly how it's held together and what the least destructive way to bridge it will be.
I also did not want to pay $200+ for a replacement drier for my 85 mondial QV which had two switches...So I purchased a generic drier for about $20 that had the side ports for both switches (I think they are 3/8") and male in and out ports for the A/C hoses. I then had the A/C shop make up a female to female adapter (black on the left side of the drier below) which cost $15 - so $35 instead of $200+ and looks mostly stock Image Unavailable, Please Login
I also had the original Sanden compressor rebuilt and am using the original hoses, condenser (cleaned), etc. - Plan to use R-12 again: Image Unavailable, Please Login
They looks very nice! Do you know how long ago you found that receiver drier? I couldn't find a generic one with the two sensor ports.
Michael - The drier was purchased e-bay - This is the listing: https://www.ebay.com/itm/310813787066?hash=item485df203ba:g:iDgAAOSw3YNXb0Xu&amdata=enc%3AAQAIAAAA4Exw8CLPX2hNQnv4HDaTsJIUEsst9zzFnqJf8PS4UtWTyYWinoMMouA%2BNcNa%2FwMIX1zTHTokX0hqo7l1QoDPUHFDv2qUrv6Zpmr8ZpOLFiaS8mW2kSTg0v8ynzqukvrWIa9ZqCZIIk1tESP76A5zHq%2B6g%2FIqgQq7hOjR%2BWCHDF8Ug0Ljg1K9TlmUmiuUyKSc6YCEDex1nYqQoYgpLASOmqwvdhBeQ2ABG8DhXu0PSDKMHsgk3FEqU2dQQYyJFYozRsMrtqhfZWAysjMjnrw3VgDdIcm82ryV3TvQQWKXjipi%7Ctkp%3ABk9SR-zlz-2kYg
also, I searched high and low for a generic drier with the correct female and male A/C hose inputs and this seemed to be the best solution (with the little adapter that I had made)
