HP LaserJet 4250 - Manual (Page 130)

9. Press down on the tab at the top of the stapler unit and push the unit into the stapler/
stacker.
10. Rotate the stapler unit toward the rear of the printer until the unit clicks into place.
11. If the stapler cartridge is not installed in the stapler unit, install it now. (See Loading
staples .)
118 Chapter 3 Managing and maintaining the printer ENWW