Kirby Heritage II Vacuum\015 I have a Kirby Heritage II vacuum cleaner that was repaired a few months ago. \302\240 The problem was that the carbon brushes had worn down, thus the motor would not operate. \302\240..Now, a few months later, the vacuum was in use when the motor started to die and finally stopped. \302\240I opened up the vacuum and noticed that one of the carbon brushes appeared to be worn again — so I wasn’t getting good conductivity across the motor. \302\240 This appears to be suspect that the new carbon brush would wear down so quickly...What could be wrong with the motor, and is it really worth fixing?..–Clarke\015

How to Identify and Fix Common Vacuum Problems ?

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Common Causes Of Carbon Brush Wear In DC Motors

Brushes being installed incorrectly or the wrong sized brush being fitted. Brushes experiencing damage due to electrical underloading or overloading. Winding faults. Voltage surges to the motor.

If your motor brushes are sparking, it may be a sign excessive brush wear, a damaged or dirty commutator, or an incorrectly installed or incompatible brush. Some sparking is normal within a tool, but if it starts to get worse, it`s likely a sign that the carbon brush is wearing.
Carbon brushes typically last between two and ten years on most machines depending on frequency of use.
If the brush displays signs of breakage, crumbling or burning then it should be replaced. If there is any change in colour to the spring (such as rainbow patterns), this could indicate that there is a broken lead in the spring, and so should be replaced.
In DC machines, the causes of rapid brush wear are: Severe sparking. Rough commutator surface. Imperfect contact.
The typical life expectancy of vacuum motor brushes is around 800 to 900 hours of use; the bearings or the armature usually fails shortly after.
A small amount of sparking is normal. Small sparks may occur until the carbon brushes bed in properly. Little minute sparks are often present but as long as they are very small should not indicate a problem.
For slightly greasy commutators, it is advisable to thoroughly clean with a clean dry cloth. If a greasy film remains, one can use a clean cloth moistened with a dry chlorine-free solvent leaving no residues after evaporation. However make sure to remove all the carbon brushes first as they are very absorbent.

A suitable brush can last up to three years and help to extend the service life of other components such as the slip ring; however, unsuitable brushes can lead to drastically increased costs and unnecessary downtime.

While not all carbon brushes look the same or are accessed in the same ways, this explanation should assist you no matter what DC motor you`re working with. For reference, here are a couple of examples of carbon brushes: To locate your motor`s carbon brushes, consult your motor`s manual or wiring diagram.
Many universal motor malfunctions are caused by wearing down of the carbon brushes, the soft blocks of carbon that complete the electrical contact to the motor`s commutator. When these brushes become worn, the motor will spark, and electrical contact may be incomplete.
Which material is commonly used in brushes? Explanation: Carbon is the most commonly used material in the manufacture of brushes. It is because carbon has high melting point, and is also less prone to high temperatures.
A carbon brush is a really just a small square of carbon that is used to carry a current through your electric motor. Without a carbon brush, the electric motor wouldn`t work.
There is no need to bed in brushes, as once installed they should be up and running immediately, with no need to wear them in at all.
Carbon brushes will on average last between 1 and 5 years in most power tools but this is all dependant on how much they are used in number of hours, the more daily use the power tool has the quicker it will wear over a certain period of time.
Many brushed motors – especially large ones – have replaceable brushes, typically made of carbon, which are designed to maintain good contact as the wear. These motors require periodic maintenance. Even with replaceable brushes, eventually the commutator also wears to the point that the motor must be replaced.
Brushed motors on average achieve a service life of 1000-3000 hours whereas brushless motors should be able to achieve 20000 hours providing they are operated within their specification. The output speed is also a key factor when choosing a brushed or brushless motor.
Why do the brushes heat up and how can the heating be reduced? As mentioned earlier, the brushes of the slip ring rub against the conductive rings which induces friction. Due to this friction, the carbon brushes heat up, and since they are brittle, they tend to get corroded due to friction.
Ballistol: Ballistol is a multipurpose cleaner used on various surfaces, including firearms. It`s effective in removing carbon build-up and also helps to protect your firearm against corrosion. Birchwood Casey Firearm Scrubber: This solvent quickly removes carbon build-up from firearms.
Remember that active carbon filters cannot be washed, they must be replaced instead. These filters have an important anti-odor action and water immersion will very likely damage them, with loss of their purifying action!
Washing the filter with water can only remove the dust in the carbon filter but we do not have experiments to verify whether it can remove the VOC absorbed. We do not recommend washing the carbon filter.
Our carbon footprint has a negative impact on the environment in multiple ways: It is the main cause of human-induced climate change, it contributes to urban air pollution, it leads to toxic acid rain, it adds to coastal and ocean acidification, and it worsens the melting of glaciers and polar ice.
Carbon brushes are available in four main grade categories: carbon graphite, electrographitic, graphite, and metal graphite.
Test the brushes for DC power excitement by removing either wire from the brush holder and scratching it against its connection to notice a bright blue spark. This is only 12 volts DC so there is no danger or electrical shock. (Flash test.) If no spark appears, then remove the brush assembly and check for damage.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Carbon Brushes wearing out quickly on Kirby Heritage II
ANSWER : 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)

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My model F5906-900 — problem is the brushes have stoped working… I pulled the brush assembly out by holding the two tabs, and all seems clean and the brush assembly rotates easly… onced the brush assembly is removed. What I did notice is the female driver slot (found in the main assembly unit) that drives the brushes seems stuck..Is that normal when the machine is not hooked up to power? How can I get the brushed going??? it is a good machine, but the brush options is important too it’s ab
ANSWER : (1) Assure the Brush Control on the hood is NOT set to the OFF position.
.(2) Remove the brush assembly by pulling/unlatching it from base on each side.
.(3) Does one of the brushes have the drive pin present? It should be about ¼ inch square, and two inches long. It attaches the brushes to the drive mechanism.
.(4) Remove and clean the intake filter. One the base of the cleaner, behind the brushes, squeeze the two red abs together and pull the panel down to access the screen. Clean the hair/debris off the screen and reassemble.

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Electrolux vacuum brush not turning problem:

was vacuuming and rug got caught auto shut off kicked off power to brush. instead of hitting red button to restart brush I disconnected brush to vacuum some hair in Conner. after i reconnected the brush and hit the red button but no power to brush. Light won’t even switch on. Hope you can help

ANSWER : Under the vacuum, there is a guard..remove the guard , either by 2 screws or by 2 clips..there is a belt under the guard..that is connected to the brush..the belt need to be replaced.

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Kirby Heritage II Vacuum Carbon Brush Placement
ANSWER : Yes the carbon brushes float on the commutator and are spring loaded. the spring washer goes in the housing first then the other washer. let me know if you have any other questions

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Just purchased this Dyson dc24 today. brush doesn’t spin after gettin tangled in a cord. removed the cord from the brush OK.
I have several times:
removed the brush and replaced it OK.
pushed the red button by the brush.
pressed the brush power switch.
ANSWER : When you removed the brush roller dod you examine the end of the actual roller that is opposite from the removal opening. There is a gear that the roller fits over that may have gotten stripped when it became tangled. Check that the gear has not rounded off and look inside the roller bar to see if the area where the gear fits into may have gotten stripped as well. You might try to operate the vacuum without the roller brush installed for a few seconds just to see if the gear turns. When I say gear, it is actually a somall “post” about 1-2″ long that the roller brush fits over. Hope this helps!

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How to remove a Kirby Heritage II Armature
ANSWER : The armature that holds the fan on is reverse threaded. It turns to the right to remove it. You can put a nail or nail punch in the hole on the armature and tap it gently to the right. this should loosen it enough to unscrew. There’s a washer, then the fan, and a spacer that fit over the shaft.

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Kirby Vacuum Hi Bruce, In my opinion, yes the Kirby would be worth it, as long as you are not replacing the motor. The switch would be the most expensive part besides the motor that would need to be replaced. The switch costs USD 49.99, the cord is roughly $39.99, and the carbon brushes are $29.99. I can easily walk you through any of these repairs should you need help. Kirby’s are great vacuum cleaners, that usually last 30+ years. Brand new these machines sell in the US for $1600 or more,
ANSWER : You can get better prices from

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Now that I just fixed my Lux Legacy canister vacuum, I need help on my other Electrolux Regency Series upright! The vacuum works fine but the rotating brush does not work and the brush motor does not turn on. Tried cleaning the brush and hitting hte reset button to no avail. This upright has a triple setting switch and I checked the each of the wires seem to be attached. Tried rotating the brush by hand and it would not budge. Was going to “encourage” the brush to turn with a set of articula
ANSWER : There are a couple rectangular holes on the bottom of the power nozzle, beside the wheels. These have tabs in them that need released with a standard screwdriver.
.rogerpotts_10.jpg.Once they release, turn the vacuum over and lift cover of power nozzle at the back. This pulls the front of the cover out of the lip on the “bumper”.
.Once this is done, you’ll need to unscrew the screw at each end of the brush. Lift the brush out and thoroughly clean it, including the ends.
. rogerpotts_9.jpg.
.Check the wiring to make sure they’re connected to the terminals of the motor. Also, check the belt for wear and tear. These belts can last for five years or more, but if it looks bad a good time to replace it is while you have the power head apart.
.When reassembling the vacuum, ensure the belt is fitted properly around the motor shaft and brush.
.Insert the front of the cover first, ensuring the edge fits neatly beneath the lip on the bumper all the way around. It takes a little manipulating to press the back into place. Make sure both tabs click into the locked position. Turn the vacuum over and reinstall screws. Try to rotate brush by hand a few times.
.At this point, plug the vacuum in and turn it on. If the power head doesn’t run, press the reset button. If the power head motor still doesn’t run, it could be due to loose or disconnected wires that lead to the reset switch, a bad reset switch, or even a bad motor. The vacuum needs to be taken to the nearest Aerus Electrolux store for further diagnosis and repair.

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