Re: Adler Barbour Cold Machine troubleshooting
It has been proven over many years that in small systems like yours R134a can be dropped in without an oil change. You don't need the automotive 134a fittings or anything.
As for the evaporator needing replacement, I have sucessfully repaired leaks on those aluminum plates using a special epoxy intended for that purpose.
The biggest problem you will have is evacuating the system, and then recharging with the correct amount of refrigerant because you need some specialized tools. Some people just replace the entire system because it is easier.
1979 Santana 30 Tall Rig