1971 c10 coverted to R134 pressures too high?

[bautino95]

Replace with a new A6 aluminum compressor. Replaced all lines with new. New dryer. Flushed evaporator and condenser. Recalibrated POA valve for r134. Have a little.more then 24 oz of refrigerant. Only things I reused was the POa, expansion valve, evaporator and condenser. Hoping the oil just needs to be distributed through the system and the pressures will come down. But I'm gonna try a differnat set of gauges to make sure.
Thanks for the help everyone.

[bautino95]

Well, no luck with the differant gauge set. Still getting too high of pressures. I'm going to evacuate the system and start with the expansion valve. I have an old AC repair book and it days there is a screen in there that is serviceable. Fingers crossed.

[weq92f]

Originally Posted by bautino95

Well, no luck with the differant gauge set. Still getting too high of pressures. I'm going to evacuate the system and start with the expansion valve. I have an old AC repair book and it days there is a screen in there that is serviceable. Fingers crossed.

.

I'll concur, a plugged TXV can manifest as an overpressure. Didn't know they were serviceable though?

-Kevin

[bautino95]

Here a Pic.

[Steeveedee]

Friend @Richard here on the board pointed out to me that the factory R12 condenser isn't up to the job of cooling the high side when using R134. I'd check deeper before draining, evacuating and refilling your system.