Lexmark E450DN - E 450dn B/W Laser Printer Service Manual page 107

9.
Remove the six screws (D).
10.
Lift the right side (opposite the coupler) and remove the duplex.
Note: At re-installation, before tightening the screws, locate the duplex unit against the left side frame. (Left side
relative to the picture above.)
4512-630
4-19
Repair information