Any of you guys had a problem getting the pressure off the York YCAS screw compressor to change the oil filter??
If I recall correctly, you should be able to valve off the compressor and remove the pressure through the shrader port on the oil filter cover.
Well our tech says this ain't working. Looks like the service and/or check valves are not holding.
The York YCAS two volume service manual has very little info on compressor service.
I would appreciate any words of wisdom.