I found the break recently. As I am always doing something on the coach I am certain it has not been very long. When I bought the coach the system did not cool. I have decided to restore it as I will now be using the coach in conditions that will require use of the defroster. Do you recommend flushi...

The drier is empty. The coach manufacturer states to add 1 oz PAG 10 or 20 for every 10' of coach length, if the system lost it's charge completely due to severe leaks. (broken comp. discharge header) This is in addition to the oil(PAG 150) in the compressor. In my case that would be 4 oz. Can I add...

The compressor was filled with oil. Just did not need/use the dash air for 10 years. Have not replaced the dryer yet, but will before putting the system back in service.

I replaced the compresser and drier on a class A diesel pusher motor home. The system has not been used for ten years. Following a good vacuum result do I need to add any oil or just add the R-134A.

Thanks,
Bob