How to remove cages from the blower motor?

[DieselCJ]

I removed the blower motor from my 1986 190. Any tips on how to get the fragile plastic cages off of the rusted motor shaft?


BTW, the hardest part was getting the damn wiper out of the way, to do this I disconnected the wiper motor from the rest of the unit so I could leave the motor in the car, removing the rest (I could not see any way of getting it out whole).

One problem I forsee is finding the correct oreintation on the fine wiper motor splines.

Thanks,
John