I was vacuuming and started to smell burning rubber, so we took the floor brush out to clean it out and we also checked the belt. The belt looked fine and the brush was all cleaned out, but when we put it all back together the brush wouldn't spin. By looking at the parts, we don't understand how it can spin (granted, we aren't vacuum experts). The ends of the brush fit into these grooves and we don't understand how it spins when the ends fit tightly into these grooves. When put all together the vacuum still runs, motor pulley still turns, but the belt doesn't turn, and we still get the burning smell (from the pulley rubbing against the belt). We think the solution must be simple, but we're stumped!
I just fixed mine. It took me all of 10 minutes. Pull the brush out. Stand the brush on end on the edge of your study work bench/table top. while holding the brush vertical( on end) take a small phillips screwdriver and tap using a hammer on the metal pin you see in the middle of the brush. Keep tamping and the whole assembly will come apart. What you will have then is a long metal shaft, 2 bearings(they are acutally skateboard wheel bearings same number same make). Clean the gobbed up hair with a razor blade and then reassemble by tapping back together. The bearing wont be worn out because they are way too tough for a vaccum. We used ride down hills on them! a ten minute fix wow and you wont have to drive to vacuum shop and spend $$ and time
I had the identical problem. One side of my end cap/bearing had actually melted together so that it appeared to be one piece and thus making it impossible for the roller brush to turn. Even though I was able to get the end cap and bearing apart using channel locks the parts were too damaged to use so I've ordered a new brush.
If you take out the brush roll, holding the ends, make sure that it spins freely, if not, replace it. Belts stretch after a short time of use and need to be replaced often. A slipping belt is what can cause the rubber smell. So you either have a bad brush roll and/or a stretched belt.
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Your belt is burning and will eventually wear down and break. The green light comes from copper brushes on your roller creating an electrical current that lights the little green light. As long as the roller is turning, the light will stay on. There may be something jamming the roller (hair, string, paper, etc). Clean the roller off and replace your belt. If you don't replace the belt it will break soon enough. Once you start smelling the "rubber burning" smell it's and indication that your belt has deteriorated at some point and has a weak spot in it. Clean the roller and replace the belt and it should be fine.
A. If your model has a floor selector switch (Bare floor/tools - Carpet) your clutch could be worn. (there is a rubber clutch pad between your cam and roller shell) - Fix would be to replace the clutch pad and belt.
B. If you don't have one of the above models, your belt could be stretched. The belt slipping could cause a rubber burning smell. Fix - Change belt.
C. Have you got any new carpet you are vacuuming or have you moved? Some of the newer style frieze carpets can cause burning rubber smell. The fibers of the carpet are longer and cause the brush to slow down causing the belt to burn. (Imagine brushing long hair with a thick brush, the hair easily gets tangled in the brush, same effect with this carpet.) Some of the newer rugs can do this as well. Some newer carpets with the thicker felt backing and/or the "pet padding" under the carpet can too. it doesn't allow enough air to flow through causing the cleaner head to seal itself to the carpet causing a burning smell. The fix is Move to another home, replace your carpets or replace your vacuum. The vacuum is the cheaper option but be cautious as most vacuums now do this with these carpets. We have had really good response from customers using the Simplicity Tandem Air models, (Synchrony and Synergy models.)
Hope this helps, if you need to talk further feel free to contact me.
If you can notice a smell of burned rubber near the sweeper, then you most likely have a slightly stretched belt. The belt would be spinning against the beater brush, causing the squeaking noise -- as it heats up, the belt will begin to smoke, or at least give off the smell of burned rubber. This will be the most noticeable if you use the vacuum for a few minutes and then turn it off -- most times the suction from the vacuum will pull the smell into the vacuum and keep you from noticing it until it has been going on for quite some time. Replacing the belt should fix the problem.
Before going out and buying the belt, you might want to check between the belt and the beater brush -- if there is a lot of debris between the belt and the beater brush, it will cause the same type of slipping as a stretched belt, and could also be the cause of your problem. Either way, to fix the issue, you have to open the bottom of the vacuum and take a look at the belt -- if it looks to be in good shape, move it around a little. If it has a lot of room to move, it's probably stretched. If you notice a big hair clog under the belt, this is most likely to be your problem -- clean that out and you should be good to go.
first check if the brush motor is turning before you spend money on a new brush roller and belt. remove the belt by unscrewing the screws holding the brush cover ( the part touching the floor ) and slip the belt of the rotor. turn the vacuum on, and the brush on while the vacuum is in a reclined position. if the motor is not moving, you need a new motor.
belt doesnt have to be broken, check the metal arm on the vacuum, see if there is build up of old rubber from previous belts, clean the arm that spins the belt and double check to make sure u have the correct belt
The brushroll may spin when looking at it but stops when pressure of the floor is applied. The belts stretch, so they look fine but are not. The smell - if it's a rubber smell - would also be the belt. Some, or most, brushrolls can get hair in the ends that could also cause a smell and belt problem.