Deere BP 72 Skid Steer Broom Brush Adjustment or Manual

Does anyone have any insight on how to adjust the brushes properly on a Deere BP72 skid steer sweeper? It seems as though one side is hanging lower than the other and is causing an inconsistent sweep. The brush looks to be evenly worn so it must be an issue with the adjustment. I'm not familiar with adjusting these, or using them in general. What should I be looking for? What would you recommend as an optimal operating setup etc.

Alternately, does anyone had a copy of the owners and...

Deere BP 72 Skid Steer Broom Brush Adjustment or Manual

Deere BP 72 Skid Steer Broom Brush Adjustment or Manual