you might wanna open the back and make sure there isnt a little e or c clamp that got loose.
those pushers dont look like screw ins.
some of them are held in to the case with a tiny e clamp on the inside of the case.
if its loose in there, it can get caught up in the gears and trash your movement.
i had this happen but caught it immediately after it happened.
open the back and push in the other pusher. see how its held in. if theres a little C shaped clamp on it, then you have one in your movement somewhere.
shake and hope to god it falls out.
edit:
heres what it would look like
that little c shaped thing.
good luck