this motor was cleaned but it was not cleaned with liquid except for the fans. again the motor was benched for over an hour at 120v on a variac transformer and then again straight from the outlet for another 20 min. The brushes were checked, reseated and bearings were greased. when the motor was sent out there was nothing at all wrong with it. I had helped nick previously with the installation of the other motor via face time, which when he sent the first motor the commutator was extremely black and a little charred. I had started it on a variac, cleaned the commutator, and reseated the brushes and that motor was run for about an hour and a half at 120v from the outlet Directly and no issues. The motor was sent back out and lasted about 5 min in his machine which I am extremely boggled by considering that, when both motors were sent out the commutators were PERFECT and gold nonetheless running absolutely beautifully. where this all went wrong is beyond me. I service hundreds of motors yearly and am no novice when it comes to servicing motors but I guarantee that if both motors were sent back to me and I were to reseat the brushes, polish the commutators and bench them BOTH for over an hour they will not fail on my bench.