Brother DCP-J4110DW Service Manual page 170

(2) Rotate the document feed roller shaft until the boss of the document separation roller gear
faces upward.
(3) Open the hook and pull out the document separation roller gear to the rear.
(4) Release the two hooks and remove the document separation roller ASSY.
Document separation roller ASSY
Hook
Boss
Document separation roller gear
3-43
Hook
Hook
(3_019_E)
Confidential