Canon imageRUNNER C5051 ADVANCE Maintenance Manual page 46

3
Pull the stapler unit of the saddle stitcher unit towards you, and then push it up .
1
4
Pull out the empty staple cartridge, holding it by its left and right sides .
5
Insert the new staple cartridge .
Push the staple cartridge in until it clicks into place.
Only one staple cartridge can be inserted at a time.
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Staple Finisher-C1/Booklet Finisher-C1/Puncher (Optional)
Stapler Unit of the
Saddle Stitcher Unit