Originally Posted by mstephens
Below the on and off handle is a bolt which tightens the plate friction. It is what you are calling a screw. When mounting this one has to extend the sliding plate by hand. Impossible unless that bolt is practically removed, thereby losing factory setting.
It should not be necessary to change the setting of the adjusting bolt to get the bar to slide. The adjusting bolt usually is factory-adjusted for a typical amount of friction force.
The on/off bolt might need to be unscrewed several turns. If you back it off enough, the bar should side. If that fails, something must be causing the bar to stick.
I towed 70,000 mile with a DrawTite friction sway control which is essentially the same as the one you have. I never encountered the kind of problem you're having.