Cleaning a Vacuum Cleaner’s Universal Motor Commutator to Reduce Sparks (and Stink!)
Lindsay Wilson had a vacuum cleaner with some gunk buildup on the motor’s brushes/commutator, a common experience with any piece of machinery used over a period of time (or if you keep a furball pet around). He disassembled the device to give it a proper cleaning, and in doing so also took a look at the unique suction mechanism (2nd image below, also in the video) used by this particular vacuum cleaner.
The vacuum cleaner in the garage was making one hell of a stink and producing a lot of sparking – seems that some gunk had become trapped in the motor brushes/commutator, burnt and caused the brushes to start sparking excessively. I stripped the whole thing down and gave it a clean up.