Canon DR-6010C - Manual (Page 45)

Maintenance 41
C
hapt
er
3
4
Wipe the removed retard roller with a cloth that has been moistened
with water and throughly wrung out.
5
Position the retard roller so the notch in the roller is facing the
scanner’s shaft.
6
Slide the roller lock lever to the left, and insert it into the retard roller
slot.