Hi. So I was hoping someone could shed some light on my issue. I bought this 2010 Carlton 2512 (2000hrs) second hand and it worked great, as far as I knew(this is my first chipper and I have never operated any other chipper before) , but It looks like I might have an issue with my feeder wheel system. My chippers hydraulic yoke only goes up and down when I move the lever in or out. Now from what I am gathering as of late is that the top feeder wheel should move up on its own to allow various sizes of lumber to go through without me having to push the lever in to move the roller up. Is this correct? Is there some switch I need to locate to put the top feeder into a float mode? Or what else might I look at to fix this?