Brother HL-8050N - Manual (Page 153)

6 - 13 ROUTINE MAINTENANCE AND CONSUMABLE ITEMS REPLACEMENT
3
Hold the toner cartridge by the grip and pull it out slowly.
To prevent the toner from dirtying the surface, lay a piece
of paper on the surface first before putting the toner
cartridge down.
4
While pushing down on the shaft of the feed roller as
shown in the illustration, widen the tab of the feed roller to
loosen it (1) and then slowly remove the feed roller from
the shaft.
5
Hold the new feed roller with the tab as shown in the
illustration and slowly push it on to the shaft of the paper
tray.
6
Align the small tab on the feed roller with the slot of the
shaft, and then push the feed roller completely in so that
the tab fits into the slot.