Recently while plowing snow with my 2n, the small pivot bar on the end of the control valve has been pulling out of my control fork. After draining the fluid and inspecting the bar and fork, it doesn't appear overly worn and I can slightly spread the fork and re-install the bar and everything works fine - for awhile. With the snow banks higher than ever, I think what is happening as I raise the backblade, it is putting too much force on the bar in the up position and causing it to "un-hook." Is something out of adjustment or am I missing something? I completely rebuilt and restored this tractor off of the knowledge and tips I learned from this awesome forum/website. Not to mention the $1-2K I spent on parts here! LOL THanks in advance....