Our beater brush makes a really loud grinding sound when turned on.

Could be the brush roll, remove brush roll and see if noise is still there when brush roll motor is running.

Hello Louis Casado,

Most of these motors make noise because the bearings have gone bad and need replacing...
(loss of lubricant or other-than-round ball bearings).

Alternatively... the rotor brushes have picked up something that is clashing with the housing... and needs to be resolved.

Clean it all... really good & run it without a load...

If all else fails to remedy your situation... pull the beater brush and cut everything but the fixed bristle rotor brush... clean it... cut it free... check out all clearances... and return it to service

Hope this helps!

Happy hunting!

Sounds like the roller brush bearings may have gone out. It difficult to find just the bearings for the Rainbow vacuum roller brush. Your best bet may be to just buy a new brush.

http://www.vacuumpartsmall.com/noname2.html

<A href="http://www.vacuumpartsmall.com/noname2.html">Rainbow vacuum roller
brush</A>

Sounds like the beater brush is frozen and won't turn. Remove the beater brush and clean off all debris, especially at both ends. You will find a square(?) piece at each end of the beater brush that holds it in place. This need to turn freely. Put a little WD40 on these where the center rod of the beater brush enters the small holders and turn by hand until they turn freely. Once this is done, assemble with new belt, making sure the belt is put on properly. If the belt is missing and you need to replace, I would still do the cleaning on the beater brush. It should move freely when you turn it by hand.

Sounds like the beater brush is frozen and won't turn. Remove the beater brush and clean off all debris, especially at both ends. You will find a square(?) piece at each end of the beater brush that holds it in place. This need to turn freely. Put a little WD40 on these where the center rod of the beater brush enters the small holders and turn by hand until they turn freely. Once this is done, assemble with new belt, making sure the belt is put on properly.

Sounds like the beater brush is frozen and won't turn. Remove the beater brush and clean off all debris, especially at both ends. You will find a square(?) piece at each end of the beater brush that holds it in place. This need to turn freely. Put a little WD40 on these where the center rod of the beater brush enters the small holders and turn by hand until they turn freely. Once this is done, assemble with new belt, making sure the belt is put on properly.

Sounds like the beater brush is frozen and won't turn. Remove the beater brush and clean off all debris, especially at both ends. You will find a square(?) piece at each end of the beater brush that holds it in place. This need to turn freely. Put a little WD40 on these where the center rod of the beater brush enters the small holders and turn by hand until they turn freely. Once this is done, assemble with new belt, making sure the belt is put on properly.

This machine has a clutch assy. that slips and makes a loud noise
when something gets stuck in the roller brush. If you have nothing stuck in the roller brush chances are the clutch is worn and needs
replacing. Not an easy job and best done by a repair tech. You can find a video on youtube showing how to replace the clutch if you are
inclined to try to do it yourself.

Tom

The belt that rotates the beater bar may be damaged - call the Dyson helpline for troubleshooting and for a solution to the problem.

Sounds like a bad motor, you have a years warranty on this, take it in for warranty repair. You will void the warranty if you mess with it.