Dell 3115cn Color Laser Printer - Manual (Page 458)

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