Canon iR4570 Series Service Manual page 289

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When fitting the sleeve bushing, be sure to take note
of the following:
The protrusion [4] of the sleeve bushing must fit the
recess in the gear unit side plate. (Otherwise, the
protrusion can come into contact with the surface of
the photosensitive drum.)
Pay attention to the orientation of the sleeve bushing.
(Be sure that the longer protrusion [5] is on the
developing cylinder side. Otherwise, you will not be
able to fit the gear unit.)
7) Remove the 2 screws [1], and detach the washer
[2]; then, detach the transfer upper guide [3].
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8) Remove the 2 screws [1], and detach the blade unit
[2].
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9) Remove the 2 screws [1]; then, remove the 2
bearings [2] and the sleeve holder (rear) [3].
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10) Remove the grip ring [1] and the screw [2]; then,
remove the washer [3], bearings [4] [5], and sleeve
holder (front) [6].
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11) Remove the developing cylinder [1].
Chapter 7
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