Epson Stylus Pro 7450 User Manual page 264

9. Carefully remove the old cutter from the printer.
10. Remove the new paper cutter from its package.
11. Make sure the spring coil is inside the cutter holder and if
necessary, reinstall the coil.
12. Fully insert the new cutter into the paper cutter holder in the
direction as shown below.
Maintenance and Transportation
264