Epson WF-C878R Series User Manual page 193

Maintaining the Printer
6. Slide out two used maintenance rollers, and remove both of them.
7. 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.
8. Fasten the screws to reattach the cover.
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Replacing Maintenance Rollers in Paper Cassette 2 to 4
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