Dell 3110 Color Laser User Manual page 304

CAUTION: Since the used print cartridge may spill some toner, do not shake it.
Removing the Used Print Cartridge
1. Push the side button and open the front cover.
2. Grasp the handles at both ends of the print cartridge that you want to replace and pull it out.
CAUTION: Since the used print cartridge may spill some toner, do not shake it.
Installing a New Print Cartridge
1. Select the new print cartridge which color matches the color of the handles on the printer cartridge to
be replaced and shake it 5 or 6 times to distribute the toner evenly.