Canon imageRUNNER ADVANCE C5500 Series Service Manual page 344

4. Disassembly/Assembly
3. Remove the Developing Unit [2] upward while pulling the stopper [1].
[2]
[1]
CAUTION:
Fit the 2 pins [1] of the Developing Unit into the holes [2] of the Process Unit, and insert the 2 pins [3] of the stopper in the
holes [4] of the Developing Unit when assembling.
[1]
[2]
[4]
[3]
CAUTION:
Be careful not to damage the contact point of the drum (on the host machine side) when installing the Developing Unit.
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