I have a 2008 R65 combine with a Sisu engine. I was driving down the road and the alarm said low fuel filter pressure. Put new filters on and now they won't fill up with fuel. Got to checking and I don't think the fuel feed pump on top of the first filter is pumping(couldn't hear it or feel it). Tapped on it and it would run for a second and then go off. Has anyone had any trouble like this?