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SW Iowa | High pressure is dependant on ambient them and humidity. The hotter more humid the day, the higher the high pressure is. What is low pressure at say 1800-2000 rpms? As long as its over 12 psi or so, it would indicate to me that there is enough freon in it. If the high pressure was very high(think nearing 300 psi) then that would indicate a condensor problem. That is not the case though. I wonder if the expansion valve is not doing its job, as you don't have much temp change at the evaporator it sounds like. Whatever you do, if you open the system again, change the dryer, it should have been changed with the compressor.
Its been a long time since I worked on a 55 series Deere, but I usually shoot for 35* evaporator temps with the engine at 1800 rpms. This way I know the a/c will work when the tractor is at WOT working all day in the field.
Michael | |
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4055 A/C problems...
