Yep, there should be a brass bushing, that per the plans (note 1) "must be 1/64 - 1/32 longer than the steel bellcrank tube. Shorten brass bushing or steel tube as required."
They don't show it in the exploded view, I guess it would be hidden inside the bellcrank anyways, but it is called out along with the bolt specs, and also in Note 1, just to the upper right of the exploded drawing, (Dwg 9, Detail B)