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Hoover WindTunnel S3765. The motor spins and the belt turns when I turn the brushes on, and the brushes will spin. The problem is that when I do this on carpet, the brushes stop spinning. As soon as I pull the "head" off the carpet, the brushes spin again. It's almost as if the vacuum suction is too great. I took the head apart and watched the motor turn the metal spindle that the belt rests on, and the belt turns as well.
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Replace the Roller Brush. Sounds like bearing in it is locking up and the the belt is slipping and not turning the Roller Brush as it has a locked up bearing. You will need to go ahead and get a replacement belt just in case you have stretched the older belt to a bigger size. I had this same experience with a Hoover and it solved my problems of "rubber burnt smell".
Hi carolinearch...
Sounds like you have a broken belt...remove the bottom of your vacuum and replace the broken belt and you should be good to go.
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this is the part for the belt, 38528036. you can get it at sears website or service center. also make sure you clean the caps on the side of the brush. take them out and remove hair and dirt. put a little or mineral oil and install them back.
I also have a loose belt and have bought additional belts but have the same problem. I put the it around the metal rotor and around the brush roller a shown by he Hoover video, and it is loose.
That means that the belt is stretched and it is slipping on the motor shaft, that is why it is hot and smells like burning rubber. You need to replace the belt. Here is the correct belt you need:
Probably the belt..
Turn it over so the bottom is facing up..
Remove the plate that surounds the brush..
Check to se if brush is spinning frely and that the belt is on there poroper
The Hoover Windtunnel™ Self-Propelled models have two belts, a flat belt and the V-Belt. This V-Belt is the one that drives the Brush Roller.
After about three months, most belts stretch out causing them to slip. This means the brushroll turns slower or not at all and the self-propelled becomes increasingly harder to push.
It is recommended that both belts should be changed at the same time.
I have a Windtunnel S3765 with the same problem - and it has very little use so I'm confident it isn't wear. I find that the wheels do not raise the agitator brush sufficiently high to reduce the drag caused by excessive contact with the carpet. If I raise the front a bit the brush spins as it should. It also works if I take the housing apart and use it without ..... but this is tricky.
Unfortunately I haven't figured out a way to hold it up efficiently. I am toying with afixing something to the bottom of the housing to raise the front enough to give the brush a little more room.
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