Use the belt to lift the drum a few inches.

Swing the drum out of the front of the dryer.

Note which end of the drum faces the front.

If the belt is broken, stand in front of the drum and put your arms inside it. Lift it up and pull it through the front opening of the machine. Having someone to help you with this is a good idea.

Make sure you get your drum back on the rollers when you reinstall the lower front bulkhead. Take your time and don't force it.