HP LaserJet Enterprise M4555 MFP series - Manual (Page 129)

4. Remove the new print cartridge from its
protective bag.
NOTE: Be careful not to damage the
memory tag (callout 1) on the print cartridge.
5. Grasp both sides of the print cartridge and
distribute the toner by gently rocking the print
cartridge five or six times.
6. Remove the orange, plastic shipping lock from
the bottom of the new print cartridge.
ENWW Replacement instructions 109