Watch new video tutorial and look for the FWS on those motor brushes!
When replacing the carbon motor brushes, replace both the top and bottom motor brush for motor balance. Also, be extra careful when unscrewing the motor cap screws if they are the original Bakelite style. Use a proper-sized screwdriver and carefully turn the screwdriver without applying too much pressure or force, because they can crack and break easily. Of course, should this happen, we have replacement motor cap screws available, too.