Canon i-SENSYS MF244dw - Manual (Page 395)

4
Shake the toner cartridge 5 or 6 times as shown below to evenly distribute the toner
inside the cartridge.
5
Install the toner cartridge.
● Align the right and left projections ( ) with the toner cartridge guides, and push securely all the way in.
6
Close the toner cover, and lower the operation panel.
If you cannot close the toner cover
Make sure that the toner cartridge is inserted properly.
Forcing it closed may cause damage.
LINKS
Replacing Toner Cartridges(P. 386)
Maintenance
389