I noticed that our central vac didn't sound right today. I took the plastic housing off the top of the motor so the commutator and brushes were visible and started it up. After a few seconds of operation I start to see the blue spark between the brushes and commutator start to extend almost 1/2" in the direction of rotation around the commutator. As this happens the speed of the motor slowly begins to drop. The motor was overhauled last April; new bearings and brushes.The vacuum is 22 yrs old so the commutator on the motor has seen a lot of wear but it looks in reasonable shape. Anybody have an idea what might be happening here? Thanks, Mike
- posted
17 years ago