3406e Cranks Cranks but no start

Yessir when I brought the valves they both came with o rings already installed on them even took them out yesterday and check them and they looked fine since they’re brand new. On the verge of just giving up, but can’t have my ole girl sitting and just rotting away. I don’t know what else to try.

 

I don’t have a secondary fuel housing on my rig I just have the 1 main housing nor a fuel separator so the only too valves I have are on my main housing.

 

Update for future reference if anyone runs in this issue. Fuel lines weren’t crimped correctly as it was allowing air to come through one of them so I decided to change them all out and I’m finally getting fuel out the back of the return line and check valve is working as it should.

So if u ever decide to get lines made at any hydraulic place make sure to hook to a pump to see if it holds vacuum don’t be like me throwing money at random parts which u don’t need to.

Also thanks @wore out and everyone else for your help.