MTZ Tractor Talk

Main MTZ Talk => MTZ Tractors - Current Models => Topic started by: damengineer on July 02, 2019, 04:55:48 PM

Title: 1220.4 Air conditioner problems
Post by: damengineer on July 02, 2019, 04:55:48 PM
My 1220.4 A/C is blowing hot air.  The compressor high side pressure will rise to 500 lbs quickly when the switches are bypassed.  I suspect the dessicant bag in the filter drier has disentegrated.  It  probably has plugged the expansion valve.  Does anyone have a number on the expansion valve.  Ray has listings on all the parts except the expansion valve.