455g runs fine for about an hour then dies

Finally to my loader out and used it clearing for about an hour then it suddenly died, bled the fuel system and finally got it to crank after about an hour of messing with it, ran fine for another hour then died again, rebled system and it fired up, so far I've checked the rubber line from tank to fuel pump and can't see anything wrong with it. I'm also replacing the screen in the bottom of the tank to see if that solves the issue, anybody have any other ideas? Or had the same problem?

455g runs fine for about an hour then dies