Canon DADF-Q1 Service Manual page 106

Chapter 3
[8]
[2]
5) Remove the E-ring [2] and the bearing [3] of the manual feed registration
roller [1] (delivery assembly rear plate); then, pull out the manual feed
registration roller [1].
[3]
3-28
[7]
[6]
[5]
[1]
[4] [3]
F-3-190
[2]
[1]
F-3-191