Air Valve for Vacuum

[chaaur2]

There is a air valve located on the right front of my 81FC35 that I
believe is used to produce vacuum. There are 4 pressure lines connected
to the valve and a diaphragm fitting with three push connections for
rubber tubing. The problem is that pressure air is leaking from the
push on connection.
Does anyone have any experience with this valve?
Thanks

Charlie Shannon
81FC35
St. Albans, WV