Canon DR-5010C - Manual (Page 75)

Regular Maintenance 73
Removing and Attaching the Feed Roller
Follow the procedure below to remove and attach the feed roller unit for
cleaning or replacement.
CAUTION
Do not use excessive force when removing or attaching the
rollers. Doing so may damage them.
Removing the Feed Roller
1.
Hold the Upper unit as shown in the diagram, and open it slowly until it stops.
CAUTION
The pickup roller is located in the middle of the Upper unit. Do not
hold the protrusion on the Upper unit when you lift it up. Doing so
may deform the pickup roller or cause a feeding error.
2.
Remove the roller cover.