Holds Vacuum on Low Side Only
Okay, I had to take my new compressor off in order to take out the PAG oil for r134a & add mineral oil for the R12 refrigerant.
I put everything back together.
Now the system only holds a vacuum on the low side, right @ 28 Hg.
When I turn the vacuum pump off with the low side (blue hose) open & the high side (red) closed, the system will hold a vacuum.
If I open the high side gauge, the low gauge loses its vacuum reading & goes back down to zero pretty quickly.
All the components on the high side are brand new (Pro6ten compressor, new dryer/receiver, new condenser, new hoses).
Also, when I have the vacuum pump on with the high side gauge open, the pump wonít ever stop putting out either steam or smoke (I canít tell which it is). When I close the high side gauge the steam/smoke stops right away.
I tried to be VERY CAREFUL about how much mineral oil I put in the new compressor. My problems started, right after I changed the oil.
I have sent off (via ebay) for a little leak detection dye kit.
If anyone has any suggested concerning these symptoms Iíve described, I would really appreciate your input.