Reply To: Oliver fuel pump

[frankr]

I’m thinking that pump might just be too simple for us to grasp.  Looking at the inlet and outlet nipples, one leads to a round hole and the other leads to that long, recessed channel.  Reckon the diaphragm material lying flat on that round hole acts as a check valve as it is allowed to deflect a bit into the channel (open) and alternately lie flat across the hole (closed)?  Just wondering.  Wish I had it here in front of me.