Replacing the fan hub on a kirby classic omega 1CB

Question

hello

>I have a Classic omega but the closest model that you list to it is probably the Kirby Heritage model

>how do i replace the fan blade hub on the Omega Classic 1-CB?

>I'm able to get to both ends of the fan shaft but can't figure out how to keep it from turning while I try to unscrew the long retaining bolt that also drives the belt.

>The part that I can't figure out is how to grasp the armature side without damaging it.

>Is there a special tool or do I just stick the blade of a s***w driver into the gaps that run along the armature?

>thanks ,email [e-mail]