Hp-41C card reader - dead

[Vintage63]

Hi Andy, you mean the bits that are mentioned in this old post ?

https://www.hpmuseum.org/forum/thread-13512.html

Coupling repair ? It looks obscure to me as to what to do.
Ihave to remove the motor from its support first and then check this component if it moves freely or not before applying super glue ?

I really don't like having to reopen this thing for the n-th time :-(

Marco