Fujitsu fi-7300NX Consumable Replacement And Cleaning Instructions page 21

6. Remove the pick rollers (x 2) one by one from the shaft.
a. Pull out the pick roller from the shaft as you lift the retaining clip.
b. Pull out the other pick roller from the shaft as you lift the retaining clip.
7. Attach new pick rollers (x 2) on the shaft one by one.
a. Insert the retaining clip of the pick roller into the slot.
b. Insert the retaining clip of the other pick roller into the slot.
ATTENTION
Confirm that the pick rollers are attached properly. Otherwise, paper jams or other feeding errors may occur.
Make sure you insert the pick rollers until they lock in place.