need help with 401a
 

i got the parts for my 401 today boy those brushes can really fly accross the room, ha i brought a sealed bearing for motor shaft but cant get the set screw out of worm gear until i get a different screw driver, from there how do i get the bearing off the shaft? is there a c ring holding bearing on?will i need a press of some sort or tool? thanks for any help you can give. motor still runs slowwww and smokes after a couple sec.