(ET) Mower motor bearing replacement

[Tom Coate <tcoate coate org>]

I want to change the bearings on a large style mower motor.  In order to do 
that, you need to pull off the flange gadget at the end of the shaft where 
the blade attaches.  Is there some trick that I'm missing in order to doing 
that?

I put a bearing separator under the flange and pulled about as hard as I 
dared with a good size puller.  the thing didn't budge at all.  Is there 
any sort of key down in the slot on the shaft that needs to come out 
first?  If so, how?  Or is it likely to be rust?  And if it is, is there 
anything I can do about that?

- Tom Coate
   E-20
   Leesburg, VA