I’ve got a Raptor w/52” deck. I need to replace the middle blade spindle. My problem is I can’t figure out how to remove the nut holding the pulley to the top of the spindle. I’ve used a pneumatic impact wrench and an open ended wrench w/cheater bar. The nut loosened just enough to make the spindle shaft loose, but no more. Now I am having difficulty securing the shaft so I can put loosening torque on the dang nut. I’ve attached a picture. Any advice?