The reason why this vacuum cleaner is to noisy and not sucking dirt is need to replace the ball bearing which found inside the vacuum motor.
If you have a vacuum that the sound is like in this video or any vacuum cleaner, stop using it unless already repair.
If the sound is like in this video and you still using, maybe sooner or later you can't use your vacuum anymore because if you ignore that sound 100% the whole vacuum motor is damaging.
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