I have a B2301 that just started having issues with the 3pt raising and lowering. It only raises when it hits 7 on the height indicator and lowers all the way when it just passes 7 on the linkage. I adjusted the linkage with no luck. It looks like the shaft coming out of the valve is square with a C clip and is turning when I actuated the raise/lower handle. I can see the bottom feedback shaft turning some but it turns only when I adjust to 7. Any ideas?