Brother HL-4000CN Service Manual page 58

3) Take the protective material (made of cardboard) out of the paper tray.
Note:
Keep the protective material if a future move of the printer is anticipated.
4) Hold the paper tray by both hands and slide it into the printer along the slot.
5) Push the tray deep into to the printer.
Note:
Be careful not to push in the tray too hard. Otherwise, the printer or tray itself may
be damaged.
Fig.2-11
Fig.2-12
Fig.2-13
II-5