Two days ago, I posted, asking for help, on my DuAl loader, being jerky when lowering and raising. I was thinking that it must be my control valves, being as both cylinders, and the pump had recently been rebuilt. I was told by three of you guys, that the problem was more than likely lack of oil coming into the pump, either air being sucked in , low oil level, restricted hose diameter on the supply hose, ect. Adirondack Case guy seems to have hit it spot on! He said it might be my breather cap restricted. I pulled the breather cap, operated the loader, and it was much better. The breather cap has a brown hard filter element, about 2" OD, in it that was plugged with old oil, and dust. I now have to find a new filter element for it. I wrote this , to THANK you guys for the replies. THANK YOU SO VERY MUCH!