I have a RCK60B-22BX mower deck that I just replaced the outer bearings, seals and spindle shaft on. When I try to tighten up the pulley nut on the top of the outer spindle shaft, it locks up at 65lbs of torque. I have removed and reinstalled the bearings and seals twice with no luck. I do have the spacer between the two bearings and reused all other parts. Can anyone help me get this figured out so I can use my tractor? Thanks in advance. John