Dell 3110 Color Laser User Manual page 294

NOTE: The roller is located approximately 165 mm (6.5 in.) inside the machine as measured from the
face of the paper tray opening.
3. Pull the separator roller hook out of the groove on the axle, and then slide the separator roller to the
left.
4. Repeat steps 2 and 3 to remove the other separator roller from the inside of the printer.