Originally Posted by
klricks
Kinda confusing but the DFR -IS- a selector valve. As you said it works in conjunction with the in-tank pumps. Here is a photo of the inside of my old DFR ('86) Showing the 2 valves and diaphragm.
I see your point/view on the valves. Dealing with these trucks, when someone is talking about a fuel selector valve, I think of the newer electric fuel switching valves and not the older DFR's that are in this model truck.
I do agree that the DFR is the switching valve for the duel tanks, but that is not its proper name and I just do not want to confuse anyone with the wrong wording of part names.