How to change carbon brushes
You need to know that very seldom will new carbon brushes alone `FIX`a motor in todays vacuums as they are higher RPM than those of 30 years ago.
On a salvageable motor a good rebuild procedure will generally include repacking bearings, cleaning suction fans and reseating new brushes with an abrasive seating stone at low speed with a motor run in device with variable voltage
That said, I have not done a HENRY in years but it likely will contain a generic AMTEK Lamb type motor as it is sold as more durable vac.
On a traditional vac motor, carbon brushes are removed by releasing a clamp over the brush. The brush holder will have either a flag terminal on it where the wiring will disconnect from the side, or a flat flag terminal which slides into a pocket on the carbon brush housing.
. If you are going to the trouble of replacing the brushes, remove and inspect the old ones for wear and chipping. Also inspect the commutator surface on the motor where the brushes contact. If there are any curved gaps between segments, or if the com is worn like an apple core , you need a motor complete.
If the motor has simply worn to the point where a brush has stuck or worn to nothing, you may be bale to reseat the new brushes, however any evidednce of BLUE sparks or noise is not a good sign . Best of luck. Post back if you need more help
Nov 01, 2009 |
Henry Numatic "" Canister Vacuum