how to fix vavles?

[cosworth34677]

I well when the servo closes the vavles they to seal and will not lock the arms. And one of the if I turn it way to far Pass the open point the the other two will work and move, good but not but not right! But they will not work if they are lined up in the right position. More then any thing they will not hold the arm. If it lifts the arm it will slowly fall .