Epson Stylus Pro 4000 Field Repair Manual page 23

Stylus Pro 4000 Field Repair Guide
12. Install the new Damper(s).
13. Re-connect the Ink Tubes to the new Dampers, and manually prime all the Dampers.
With the Damper openings facing
up, draw the air out of the each
Damper.
14. Reconnect the Print Head to the Damper Assembly.
Connect the Print Head and
fasten with 3 Screws.
Damper Removal Printer Component, Software Item, LCD Display, Printer Button
4/28/05
Page 23.