Mine was doing that and after looking at the outside, there is an adjustment screw outside underneath. Loosen the bolts and turn it 1/4 turn, then retighten. See if its better or if it needs more. I marked everything so I could put it back if it didn't work. Mine quit rubbing though.
Martin & Cheryl
40 Foot 2009 Damon Tuscany 4076
Cummins 360, Hyundai Santa Fe
Full timing since 2010.