Equalizer WDH: what do the washers do?

In my equalizer WDH there's a washer system for adjusting the fit. I don't have the manual for this thing.

My dealer is having trouble adjusting the hitch because the torsion arms of the hitch are hitting the long bolt which holds the mechanism to the frame. It has been suggested that the torsion bars be trimmed back an inch or two so they clear the bolts. Dealer suggest trimming back the bolts (an idea I don't like because it gives you less cushion if one of the bolts works loose unexpectedly).

Finally, he said he thinks adding washers will take care of things. My question: exactly what axis does adding washers adjust? I need more "lift" since the rear of the TV and front of the TM are still sagging a bit.

Sorry if this is confusing - hard to find the right terms to use without a diagram .