| Refrigerant oil questions [message #287108] |
Fri, 11 September 2015 20:16  |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
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I always use the correct oil to match what the vehicle had at manufacture time. The way I understand it there are basically 3 types of oil and several weights at least when PAG is used.
1. Mineral oil was used with R-12 and R-22.
2. PAG was sued in most R-134 applications.
3. Then there was Polyester (POE) oil was used where?
Here is why it is important to me.
When I got my coach about 14 or so years ago the PO had switched it to R-134. I left it that way until a hose rubbed through on the frame, leaked, and needed to be replaced. It is interesting that none of the o-rings were switched to green ones. Everyone I have looked at one it is black but never leaked. At that time seeing no oil leaks on the hose I replaced the hose and dryer and added no oil. I charged it with Duracool and it ran well until now when I developed another leak at the front compressor seal.
Now I am removing the compressor to fix the front seal and I'm sure to loose some oil in the process.
I will recharge it again with Duracool so oil type is not an issue there. What is an issue is what type of oil can I add and not cause a problem with what is already in there.
Can I add POE oil and not cause a problem or do I have to guess that the oil still in it is mineral oil and add some of that?
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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