Our power nozzle motor is dying. I cleaned it and that improved the situation, but one of the carbon motor brushes is badly warn and I'm sure that's what's causing the problem. I've searched everywhere on line for a source of the brushes and have so far come up empty. I'd hate to replace the who motor when it's such a simple fix with the right parts.
Anyone have an idea where I can get replacement motor brushes for a motor with the following information stamped on it:
G S Electric
120 V 60Hz
100 8000 500
A5412-10 LOT 3
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Re: Carbon motor brush source?
Unfortunatly the only way you could purchase the carbon brushes is from a vacuum parts dealer directly. the brushes will most likely end up costing you close toth price of a new motor anyway. sometimes its best to just get a new motor as the newer designes rotate teh brush much faster for better cleaning.
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That problem have 2 causes..#1 is loose electrical connection inside or on the power cord..#2 is worn out carbon brush inside of vacuum motor..
Carbon brush is the one of the most serviceable parts of a vacuum cleaner because our vacuum cleaner motor is very hard working parts so the brush inside will possible worn or not connected to the armature of rotor...
the motor carbon brushes need replacing which is a most difficult job to get the cleaner disassembled. Brushes are easy to fit if You have replaced carbon brushes in other appliances etc.. Getting to the brushes in the Kirby is very difficult... Lee in Australia
Try to see the motor and the carbon brush that connected to it..
This are the step on how to open or remove the cover of the vacuum to reveal the motor.
Take off the top panel.
Loosening all screws that you will see inside that top panel.
After that, the top cover of the vacuum release and the image of the motor reveal.
Now try to look at the motor and remove it to the unit by unscrewing it.
Next, try to spin it manually using your 2 fingers and hold the plate then spin it.If the plate is hard to spin,the motor is need to re-align.
To re-align the motor you have to loosen the screws at the 4 corners then release the rotor then back again.
After that,clean the bushing of motor and the rotor and apply the motor oil for lubrication.Then re-install it and tighten the screws on the 4 corners while you re-align the rotor.
Use a rubber mallet to align the rotor,hit the body of the motor while you tighten the 4 corners screws.
After that spin the plate again to test the alignment,if the plate spin it smoothly.the alignment is OK.
After that you have to test the resistance of the motor to make sure that the carbon brush is contact to the armature of the rotor.Use a multimeter (range in ohms) then point the test probe directly to the carbon brush wire.It should have not more than 25 ohms depends on the horse power of the motor.
When the reading is open the contact of the carbon brush is reaching the armature of the rotor.Replace the carbon brush.
If you accomplish all of the steps above and the you found a defective parts.Test the vacuum by powering it ON.
First - stop using the machine! The black material in the exhaust filter is carbon dust from the carbon brushes in the motor. The fact that the motor quickly smells hot and is shedding so much carbon indicates that the carbon brushes are worn to their limit (or damaged). They need replacing. Don't use the machine again until the new carbon brushes are in place or you risk causing irreparable damage and will be in line for a costly new motor. Carbon brushes are usually not expensive but, depending on your expertise, you may need someone to fit them for you.
You don't tell us the make or model of your vacuum so that's about all I can say. Good luck.
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
Try looking for a power tool repair shop, they usually have some brushes and can order more. I have put Hoover brushes in my Shop-Vac.
Look for some that are close to matching,( spring size,spring length, brush length). If the brushes are a little large they can be made smaller by dragging on a flat file. Carefully fit them so they slide into the brushholder nicely.
I have even soldered different ends onto the pigtails, whatever works----I am a pragmatist!
You could also look for an electric motor repair shop in your area- they have suppliers.
4 possible reasons. 1 – one or both bearings are worn so armature (rotating part) wobbles as it is spinning and cause motor brushes to wear fast. Solution – change bearings too. 2 – Whoever replaced brushes – did not use some brush seating sticks to make cmutator smother and contour brushes to the shape of the comutator (not likely). Solution – appropriately install new set of brushes. 3 – Comutator is so warped that seating sticks do not help anymore – solution – new armature or turn the old armature. 4 – The fact that ONLY ONE brush was worn may mean that there is something wrong with the brush or housing. Maybe it could not move freely within the housing? I think this may be most likely cause it it may be a combination of all 4.Is it worth to fix? Hmm depends how much will it be. If this is 100+ - I’d say get newer Kirby for 300 ad enjoy the tech drive (Heritage does not have tech drive so it is much harder to vacuum with than the newer models)