Vibrating – that usually happens on some short fiber or very dense carpets. When nozzle goes against the carpet fiber Kirby starts jumping. Try vacuuming the same place while facing opposite way.
Belt – red arrows means DISENGAGE. When you install the nozzle on the Kirby unit while green arrows match you will not be able to turn it on red. You must follow sequence (starting from nozzle off the Kirby, green arrows match, Kirby front lifter all the way up by pressing one of the pedals):
1. Turn Kirby knob to match red arrows. You will feel some tension and hook inside of the nozzle is supposed to catch the belt and stretch forming a loop for the Kirby shaft.
2. Put the nozzle on the Kirby and lock it on with the latch.
3. Twist the knob back to match the green arrows. YOU ARE DONE
Go to
GoodVac.com Kirby vacuum online manual. There are some small details that you may want to pay attention to if you have removed the brush roll to install a new belt. Also there are some pictures that will help you understanding the process.
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