Ok I bought a new expansion valve for the evap on my rebuilt AC unit, also bought the R134 Tank and replaced all the valve stems. My question is, the new replacment Screen for the expansion valve, which side does that go into. the side of the evap or the side of the Dryer tank? the screen is real small and is like a filter. Can anyone help me on infomation as to how or where I can get parts for the 69 AC Box.. thanks.