How does the Kirby belt work?
Kirby Powerhead belt lifter- The Kirby system uses a belt lifter (on the powerhead) and a pulley (on the vacuum side). The point of the belt lifter is to lift off the belt from the pulley when you don't want the brushroll to spin (for example using the vacuum on hardwood).
Also know, how does Kirby vacuum work?
VACUUMING. When you are vacuuming or using the carpet shampooer in the upright position, push down the Drive (D) pedal.