[87MH]

Ray:

Check the pressure in your tank via the Schrader valve on the very bottom of the volume tank. If it is still holding pressure, everything is copasetic. There is a relief valve that exhausts to atmosphere whenever the compressor cuts out. This is designed so that the compressor does not start against a pressure head. The relief valve blows off the line to the volume tank, and a check valve on top of the volume tank holds pressure in the tank.

If you lose pressure thru the blow down valve, you might want to repair/replace the check valve. Mine on the ’87 was chock a block full of some sort of sticky substance. After cleaning, all is working OK.