Epson WorkForce Pro WF-R8590 DTWF - Manual (Page 126)

3. Lift up the ink supply unit.
Note:
If you cannot lift up the ink supply unit, pull the handle forward.
4. Unpack the new ink supply unit from its package.
c
Important:
Do not touch the sections shown in the illustration. Doing so may prevent normal operation and printing.
User's Guide
Replacing Ink Supply Units and Other Consumables
126