Brother DCP-L8400CDN Service Manual page 260

(3) Turn the ADF unit upside down.
(4) Remove the Taptite cup B M3x10 screw from the ADF unit.
(5) Turn the ADF unit right side up.
(6) Remove the five Taptite cup B M3x10 screws from the Upper ADF chute.
(7) Remove the Upper ADF chute from the ADF unit.
Taptite cup B M3x10
ADF unit
Taptite cup B M3x10
Fig. 3-113
Fig. 3-114
3-96
ADF unit
Taptite cup B M3x10
Upper ADF chute
Confidential