Canon W8400 Series, Service Manual, Page: 116 / 224

Chapter 4
4-16
4) Disconnect the flexible cable [2] extending to the cable mount [1] from the clamp and guide.
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5) When ink has been drained automatically, remove the ink tube unit joint [1] and ink tank unit joint [2]. Insert the ink-tube-unit-side joint in the ink
supply base having an ink absorber [3] so that the joint is not disconnected accidentally.
6) When ink has been drained automatically, unlock the print head lock lever to allow the ink for all six colors in the ink tubes to flow simultaneously to
the ink absorber [3].
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7) Remove the print head.
8) Remove the spring [1] and shaft [2] and then remove the slide the print head lock lever [3] by sliding it forward.
[1]
[2]
[2]
[1]
[3]