Brother mfc 8860dn, what is the difference between drum and toner.

On this machine the toner cartridge is installed into the drum unit so they are separate units. After opening the front door you can lift and then pull out the toner cartridge/drum unit assembly. There is a blue release lever thet is used to release the toner cartridge from the drum unit. As far as the difference? Well the toner cartridge contains the toner, and the drum unit contains the drum as well as other parts that make up the print "process". The toner is good for about 5,000 pages while the drum unit is good for about 18,000 pages. The drum unit life indicator can be reset to get additional life from the drum unit. To do this, open the front door and leave it open. The press the clear/stop key, then press 1
Good Luck and Thank You for using Fixya.