Brother HL 4570CDWT - Manual (Page 117)

Routine Maintenance
111
5
b
Hold the green handle of the drum unit. Pull the drum unit out until it stops.
c Turn the green lock lever (1) at the left of the machine counterclockwise to the release position. Holding
the green handles of the drum unit, lift the front of the drum unit and remove it from the machine.
d
Hold the green handle of the belt unit with both hands and lift the belt unit up, then pull it out.
1