Dell C3760dn Color Laser Printer - Manual (Page 333)

Maintaining Your Printer 331
4 Slide the retard roller to the left to remove it from tray1.
Installing a Retard Roller in Tray1
1 Slide the two axles of the retard roller into the holes on tray1.
2 Press down the retard roller until it snaps.
3 Load paper in tray1, and then insert the tray into the printer and push until it stops.