If you are indicating that you know for a fact that the brushes are good, that indicates that you are knowledgeable and handy. That being the case, hot wire the motor directly to the mains and see if motor runs. That test will tell you all you need to know and where else to look for remedy.
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If you are indicating that you know for a fact that the brushes are good, that indicates that you are knowledgeable and handy. That being the case, hot wire the motor directly to the mains and see if motor runs. That test will tell you all you need to know and where else to look for remedy.