Epson Stylus Pro 7450 User Manual page 278

4. For Stylus Pro 9880/9880C/9450 users:
Make sure that the casters at the base unit are locked.
For Stylus Pro 7880/7880C/7450 users:
Make sure that the casters at the base unit are locked, and that
the stabilizer knobs of the base unit are extended to the floor.
Note:
Place the casters sideways and lock them so they will not move.
5. Remove the left and right side wing nuts. Keep them in a safe
place.
Maintenance and Transportation
278