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Our Hoover U8172-900 brush motor is not working. Do you have a wiring diagram so I can determine if the motor circuit board is the problem or the motor?

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No diagrram is necessary unless you have dismandled.
Check if the brushes are touching the mtor commutator. If not you can easily remove both the brushes and polish the surface evenly .Insert only after cleaning the motor commutator till the copper shines.
Use can check for the continuity of the brushes to show that the armature is working Ok.
Now check the filed winding. Both the windiings must snot show any leak or short to the body. If so the motor is fault.
If field is ok with the resistance check then check for power supply to mtor when switch is triggered . If not check cord and switch.
Hope this tip helps.

Posted on Aug 29, 2010

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