Question about Hoover U6437-900 / U6439-900 Windtunnel Bagged Upright Vacuum

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Hoover WindTunnel Canister: Roller brush motor not turning

Hoover WindTunnel Canister model S3639: I replaced the belt for the roller brush but the motor that powers it doesn't appear to working. The motor's spindle doesn't turn (and there's no smoke or burning smell). The power cord from the handle to the power nozzle is plugged in tightly because the light in the power nozzle works. Does this model have a record of faulty roller brush motors? I'm not about to start replacing parts unless I know what the problem is. Jim, New Bern NC

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Re: Hoover WindTunnel Canister: Roller brush motor not...

These motors have a fuse incorporated in the field winding and it sounds like that blew. These motors sometimes overheat at the front bearing and the bearing will melt into the plastic housing. This will cause the fuse to blow. It sounds like that's your problem. You can remove the motor by removing the three screws on the bottom of the powerhead and then check the front bearing for any bubbling or blistering in the plastic housing. The shaft of the motor should turn easily.

Posted on Jan 27, 2008

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How do you replace the beater bar belt on the hoover u 6626-900

It is not a "Beater Bar". Hoovers have brush rollers and are easy to replace. Turn the machine over and remove the 4 screws which hold the cover on, over the brush. Remove the brush roller. Slide the new roller through the small belt (self propelled models) and secure into slots (note: slots are different, match roller sides to correct slot.

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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.

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That means that you need to replace the belt. Here is the belt you need for your model.

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1 Answer

The bottom of the hoover wont work. its not picking anything up and not spinning round.

You most likely will need to replace the belt on this model. There are 4 screws in the corners of the bottom power nozzle. DO NOT remove the 3 that are grouped together (these are the motor screws). once the top is removed then remove 3 roller cover screws. replce belt and reassemble in reverse order.

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Describe how to replace belt on hoover windtunnel bagless

If you turn the vacuum so the bottom is facing up you will see the base plate that covers the roller brush. There will be four screws (usually phillips head), remove the screws and the base plate will lift off. You now have access to the roller brush and belt. Lift the roller brush up and remove the old belt. Place one end of the new belt over the motor shaft and the other end over the roller brush and put the roller brush back in place. Now simply replace the base plate and you're done! This models requires Hoover belt # 38528033 (single) or Hoover belt #40201160 (2 pack). You can get this belt at

Here's the pages:

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Belt will not stay on hoover windtunnel s3765

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.

May 23, 2009 | Hoover S3765-040 WindTunnel Bagless...

1 Answer

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It sounds like you need to replace the actuator arm or the cable to it. Look for Hoover part 43143046 for a start. I've got a similar problem.

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Aug 17, 2008 | Hoover S3639 WindTunnel Bagged Canister...

1 Answer

Belt Stretched on my Hoover Windtunnel Farrington upright model U6431-900

hi, In order to to replace the V belt the one that turns the brush, One must take off the bigger belt " drive belt" that goes over that hugh wheel towards the back. When a belt gets stretched they will not turn the brush very well. If you have bought replacement belts the bigger belt Drive comes 2 in a package. Then you have your little V belt that helps turn your roller brush over. Yes the belts don't last long on my hoover. For kpatr22101 When you rpelace that V belt it goes over the roller brush into a little groove on the brush and then over a plastic round wheel then you must put on that bigger drive belt that must fit over that hugh wheel towards back and smaller on in front. Yes it is hard to get on. the I hope this helps. Cindy G.

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1 Answer

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I don't know how old your machine is, but the belt should be changed at least once a year and you should check to make sure the roller spins freely. There are bearings at either end of the roller and they will become contaminated with dirt and hair after a while and will need to be serviced. A new belt will help, but won't last if the roller is in need of service.

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