Canon imageRUNNER ADVANCE 4551i Service Manual page 964

2. Push the button to open the Right Cover.
CAUTION:
To avoid any damage on the Drum Unit, keep the Right
Cover open by 5 cm or more during installation.
3. Turn the Lock Lever as shown in the figure. Remove
the Waste Toner Container.
4. Remove 1 screw from the Developing Pressure
Lever. Turn the Developing Pressure Lever as
shown in the figure and release the Drum Unit.
• 1 Screw
1x
5. Remove the Drum Unit.
CAUTION:
Do not touch the drum surface during the work. Be sure
to block light to the removed Drum Unit using paper.
951
9. Installation