Brother HL-3040CN Service Manual page 168

<Installing procedure>
(1) Align the shaft of the roller holder ASSY to the hole of the Paper feed unit and insert it into
the hole.
Paper feed unit
Roller holder ASSY
(2) Slide the Roller holder ASSY in the direction of the arrow 2a and 2b in this order, and fit
the "B" of the Roller holder ASSY into the "A" of the Paper feed unit.
2a
1a
Shaft
Hole
Fig. 4-29
Paper feed unit
"A"
2b
Roller holder ASSY
Fig. 4-30
4-18
Paper feed unit
1b
1a
"B"
Confidential