Canon MultiPASS C5000 User Manual page 207

Remove the The color BJ tank is on the left; the black BJ tank is on the
right.
empty BJ tank.
Grasp the tab on the top of the tank and pull forward to
release the BJ tank.
Then lift the BJ tank up and out of the BJ cartridge unit.
Dispose of the BJ tank properly. You may want to place it
in a plastic bag to keep from spilling any residual ink.
Take the new Remove the orange protective cap.
BJ tank out of
Do not touch the bottom of the BJ tank; you may get ink
its packaging.
on your hands.
Chapter 9
Maintaining the MultiPASS C5000 9-17