Ricoh FT6645 Manual page 303

PAPER FEED
[C]
11. Fully draw out the paper tray
12. Remove the two screws [A] fixing the tray feed unit [B].
14. Disconnect the connectors [C].
15. Loosen the two Allen screws [D].
NOTE: When re-installing the tray feed clutch, set the stopper [F] of the
clutch on the edge of the bracket [G] then fully push in the clutch
on the feed roller shaft [H] and secure the Allen screws [D].