Terex ta27 getting air in fuel filter Cummins

Hello, after running my haul truck (cummins powered terex) for a few hours it starts trying to stall. I've figured out that when it does this the fuel filter is half empty or more and bleeding the air out of it gets it going again. Also the filter is very hot but it's In with hydraulic accumulator.
My guesses are either boiling the fuel, clugged pickup sock, or fitting letting air In between filter and tank...
Anyone have thoughts about this or how to diagnose?
Thanks

Terex ta27 getting air in fuel filter Cummins