You need three people to lift the printer.
Be careful not to catch your fingers between the printer and the sheet feeder.
4. Tighten the two screws provided with the feeder using a coin or screw driver.
5. Secure the printer and the 550-sheet feeder with a plastic clamp-lock and the long screw provided with the feeder.
6. Insert the tray into the printer, and push it until it stops.
7. Remove the tray from the 550-sheet feeder.