Oki C 5500n - Manual (Page 54)

C5500n User’s Guide
Replace a Toner Cartridge • 54
7. Hold the cartridge by its top center with the colored
release lever to the right. Insert the left end of the
cartridge into the top of the image drum. Push it firmly
against the spring on the drum unit.
c53_80_tonrout.jpg and c53_73_tonerdrum.jpg