Brother HL-4000CN Service Manual page 106

5.3 Housing ASSY Retard
5.3.1 Major functions
Clutch turn (MSI turn clutch)
Transmits the drive from the main drive ASSY to the roll turn.
Roll turn
The roll turn is rotated by the drive from the main drive ASSY through the clutch turn
(MSI turn clutch) to feed the paper from the manual feed tray to the chute REGI (REGI
roll) (refer to "5.8 Xerographics").
5.3.2 Reference diagram
ROLL TURN
CLUTCH TURN(MSI Turn Clutch)
Fig.3-36
III-28