i have a bit of a problem. i got a wireless vacuette and the motor/gearbox was seized. i took the cover off the back of the gear box. caked like melted wax look like it hadn't seen a good checkup in decades. i picked most of the old junk out and got the wheels to turn backwards but not forwards. still stuck. took the big screw out the bottom picked some more and the bearing just fell apart. any hope for it?