Dell 3100cn Color Laser Printer User Manual page 62

Removing Optional Tray Modules
CAUTION: To lift the printer safely and replace the optional 250-sheet tray module or 500-sheet tray module requires two people to stand in
front (operator panel side) and behind the printer and to lift at the same time. Do not try to lift the printer from the sides.
CAUTION: Make sure your fingers are not under the printer when you set it down.
NOTE: You can use a maximum of two trays with your printer (the standard 250-sheet tray module and one additional 250-sheet tray module or 500-
sheet tray module).
1. Turn off the printer and unplug the printer power cable.
2. Unlock the tray from the printer by removing the tray from the tray module and turning the locking mechanism, inside the printer, as shown in the
graphic.
3. Remove the printer from the tray.
CAUTION: Lift the printer with two people, one facing the front of the printer (operator panel side) and the other facing the back. Never try to lift
the printer while facing its right and left sides.
4. To unlock the trays, loosen the screws with a coin and remove them from the inside of the tray.