Tom,
I have never performed the task that you are referring to, but from what I understand, the adjustment that you want to perform is accomplished by jacking the slide up enough to move it over one tooth on the equalizer bar. However I am not positive that is what you need to do. I would call Ken Carpenter at BCS (Beaver Coach Sales) before I got too involved.
Also check the pin or keyway (both styles are used) that holds the gears to the equalizer shaft, because if one of these are broken, it will cause the same problem.
Gerald