Quote:
|
What does it take to go from R134a back to R12?
|
It is an all day job for me. Disassemble everything, blow everything out with the proper flush materials, replace the dryer, add the proper amount of mineral oil, make sure mineral oil is in compressor, replace and lube up o-rings and button it up. Vacuum, typically overnight, then charge with the proper amount of refrigerant and you should be good to go. I typically will install a new compressor too.
Plug for Rollguy here. Over past couple years I have gone through one 300D with a new r4 compress and dryer and putting it back to r12. On another 300CD I went with Rollguy's Sanden conversion kit in addition to a new pflow condener and dryer and running r134. Hands down the unit running the Sanden a/c works better than the one running the original r12.
Make sure you address hose issues while the system is apart.