4720 Low AC

[jcalla]

I,m replacing my ac compressor for the 4th time on my 2010 4720 tractor. How do I get the right sub-cooling charge into the system?

JPC

 

[Tx Jim]

AC systems that have failed compressors need to have interior components flushed very well. Are you keeping refrigerant charge pressures within chart pressures. The radiator, condenser & evaporator external fines need to be keep clean similar to their automobile counterparts.https://www.electronicshub.org/ac-pressure-chart/

I have a '91 JD 4255 with 12,000 hrs of use that I've owned since Feb '93 on it's 2nd compressor due to AC clutch failure & a '11 Kubota M7040 with 2000 hrs of use with original AC compressor.

 

[jcalla]

AC systems that have failed compressors need to have interior components flushed very well. Are you keeping refrigerant charge pressures within chart pressures. The radiator, condenser & evaporator external fines need to be keep clean similar to their automobile counterparts.https://www.electronicshub.org/ac-pressure-chart/

I have a '91 JD 4255 with 12,000 hrs of use that I've owned since Feb '93 on it's 2nd compressor due to AC clutch failure & a '11 Kubota M7040 with 2000 hrs of use with original AC compressor.

How do I clean the expansion valve? Should I replace it?