Throw out bearing question.

[Sharps40]

Got an S10 throwout bearing in my Astro Van clutch assembly on John Lee.

Occasinally getting sticky at the floor board.

Pulled the inspection pan.

The groove that the fork rides in......

looks like a pulley.

The rear lip is loose, slides in and out of the bearing by hand.

Basically its like the groove of the pully can be wide or narrow.........

It shouldn't be that way right?

i.e. the groove for the fork shouldn't be adjustable width....press fit together to stay the same width of the tines on the fork not slipping in and out and changing width.