< 7 steps in all >
Open the front cover.
Squeeze the green parts of the staple case and pull the case up and then out.

Remove the empty staple cartridge.
Press the lock button to release the staple case cover and then remove the staple cartridge.
When staples remain, the staple cartridge cannot be removed.

Insert a new staple cartridge into the staple case.
Push the staple cartridge in until it clicks into place.
Do not remove the seal from the cartridge before inserting the cartridge into the case.

Pull the seal that holds the staples straight out.

Push the staple case firmly back in.
Push the staple case in until it clicks into place.

Close the front cover.

Make a proof copy in staple sort function to verify that stapling takes place correctly.
Replacing the staple cartridge (saddle stitch unit)
Before starting this procedure, remove all output from the output tray of the saddle finisher (large stacker). Do not replace removed output back in the output tray.
< 8 steps in all >
Open the front cover.
Grasp the handle on the saddle stitch unit and pull it slowly out until it stops.

Pull the staple unit in the saddle stitch unit out and then rotate it up.

Grasp the left and right side of each empty staple cartridge and remove the cartridges.

Load new staple cartridges.
Replace both staple cartridges.
Remove the cover from each staple cartridge and then install the cartridge.

Pull the staple unit of the saddle finisher forward and then rotate it back to its original position.

Push the saddle stitch unit in.

Close the front cover of the saddle finisher.

Make a test print or copy using the saddle stitch function to verify that stapling takes place correctly.