Re-gasing Old Original Air-Conditioning Units HJ HX

[Beast Master]

Has anybody re-gased old original aircon unit{HJ,HX} with new gas and do you need to upgrade anything to make it work or comply.

[wbute]

They say the hoses are too porous for the new gas but they will work. I converted our old 12r gas AC systems on our tractors over to 134a gas and they didn't change anything. My wb runs on as well but I got it re-gases with that propane mix stuff and it promptly froze up and wrecked the compressor.

[cheesygrinner]

I too thought the hoses had to be changed. Mine was done about 15 years ago from R12 to 134a.

[agr071]

Can still use original hoses.
Drain the oil from the compressor and put a PAG oil in it.
Change receiver drier and charge fittings.
Regas on R134a and away you go.
I put 550g in mine and it's just right. Head pressures are good as well.

BUT BEWARE.... as of July 1 A/C regassing WILL be going up. There is a new type of gas on the market and buying prices will increase by 300 to 400%. R134a WILL be getting phased out.