Epson WorkForce Pro WF-R8590 DTWF - Manual (Page 133)

7. Slide out the two used maintenance rollers, and remove them.
8. Insert two new maintenance rollers until they click into place.
Note:
Insert the maintenance rollers by rolling them so that you can insert them smoothly.
9. Reattach the cover inside the back of the printer.
10. Hold up the maintenance roller for the paper cassette by rolling it up, and then remove it.
User's Guide
Replacing Ink Supply Units and Other Consumables
133