Canon BJC 3000 Reference Manual page 152

4
Grip the bottom of the ink tank as shown in the figure and twist off the
orange protective cap in the direction of the arrow.
Do not press this side of the ink tank, to prevent ink spills.
• Never attempt to reattach a protective cap to an ink tank. Discard the
Note
protective cap according to the local laws and regulations regarding dis
posal of consumables.
Protective cap
Replacing the Ink Tanks
Routine Maintenance 152