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

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We have a Hoover Windtunnel vac, Model U6432-900, and the brush roll will not turn. The v-belt seems too loose to turn the brushroll. The flat belt seems to be tight and working properly. I replaced the v-belt and the brushroll but it's the same as before. Is there a way to adjust the tension on the burshroll v-belt?

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  • Contributor
  • 7 Answers

The V belt will stay " loose" until you lower the handle. Try replacing the flat belt and that should work.

Posted on Dec 04, 2017

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Posted on Jan 02, 2017

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reddevil6
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SOURCE: Hoover windtunnel Self-propelled - brush roll stops

There is a idler wheel that will drive the V belt, sometimes they jam and you just have to reach in, push and make sure if comes in contact with the belt. Alot of times tho it is the other flat belt, 38528035 that will stretch and can cause you to have problems with the brush roll not turning.

Posted on Feb 12, 2008

reddevil6
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SOURCE: Brush Roll belt won't engage on WindTunnel self-propelled

When you had the brush roll off, did the ends turn freely? If not then the brush won't turn and the belt will just slip. You would have to replace the brush roll if either of the ends are frozen. Other then that you would have to remove the top cover to see if there any broken parts, there is a spring loaded asm, it has a black wheel that will push the V belt when it is in the carpet setting and the handle is in the down position, it could be jammed so the roller is stuck.

Posted on Sep 18, 2008

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SOURCE: brush roller on windtunnel won't spin

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.

Posted on Jun 04, 2009

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SOURCE: auto brush on hoover windtunnel doesn't spin anymore

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.

Posted on Jul 09, 2009

  • 2 Answers

SOURCE: My Hoover steam vac spin scrub model 4060-900 brushes are not spinning and I have lost the manual. Any ideas. Thanks. bushteachers@yahoo.com

To fix mine: I removed the brush assembly, showing that when the machine was powered on, the square of the drive gear was not spinning. I used a flat heat screwdriver and inserted it into the square, then gently worked it back and forth until the turbine was free. Then I squirted household oil down into the hole before replacing the brushes. Has been working fine ever since.

Posted on Jul 01, 2010

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1 Answer

Why does my brush roller stop and heat up belts?


Hi! If you have replaced the belt with a new one and your brush-roll is still not spinning, your brush-roll may need to be replaced. Remove the brushroll and clear it of hair and debris. Spin the end caps with your hand. They should spin easily with no tension. Inspect the area on the brushroll where the belt rests on for damages. To order a replacement brushroll click on this link. Search Results It could also be that the incorrect belt is being used with the vacuum. Make sure you are using genuine Hoover parts when replacing the belt. Click on this link to order a replacement belt. Search Results & Search Results

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Hi! If you have replaced the belt with a new one and your brush-roll is still not spinning, your brush-roll may need to be replaced. Remove the brushroll and clear it of hair and debris. Spin the end caps with your hand. They should spin easily with no tension. Inspect the area on the brushroll where the belt rests on for damages. To order a replacement brushroll click on this link. Search Results It could also be that the incorrect belt is being used with the vacuum. Make sure you are using genuine Hoover parts when replacing the belt. Click on these links to order a replacement belt. Search Results & Search Results

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1 Answer

Belt won't stay on


A belt will slip off because it is stretched, or the brush bearings are worn, or the motor drive shaft is misaligned.
Hoover belts fit snug.
After as little as week they begin to stretch. Even though they are not broken, they will spin loose. IF you can stop the brush with little effort and the belt keeps moving the belt is stretched. Do not buy a belt buy size, buy it by model. But 2 and store your spare under the hood of the vac if possible.For best cleaning results,change every 3-4 months if you vacuum weekly. 6 months at most.
Most times your old belt will be stretched as much as 30% oversize. If it looks shiny inside it has likely been slipping.
Before reinstalling check that your brush rolls freely and clean the bearings at the end of the brush roll.. Once reinstalled check it again before turning on the vac.

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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.

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When you put the flat belt on, is the print on the outside of the belt? Is the brush correctly positioned?

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1 Answer

Brush Roll belt won't engage on WindTunnel self-propelled


When you had the brush roll off, did the ends turn freely? If not then the brush won't turn and the belt will just slip. You would have to replace the brush roll if either of the ends are frozen. Other then that you would have to remove the top cover to see if there any broken parts, there is a spring loaded asm, it has a black wheel that will push the V belt when it is in the carpet setting and the handle is in the down position, it could be jammed so the roller is stuck.

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1 Answer

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If the belt is getting hot, then it is slipping instead of turning the brush roll. Check thge brush roll, make sure the ends are turning freely. Is the motor running ok? If it is then either the brush roll is bad, need a new belt, or something is catching the belt, not letting it move.

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1 Answer

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Turn vac over, remove the 4 screws holding the bottom plate covering the brush roll. There are 2 belts, one is a V belt ( 38528034) for the brush roll, the other is a flat belt (38528035) that goes from the larger pulley and the motor shat, put it on the motor shaft then stretch it to go over the pulley.

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Most Hoovers if you turn the vac over, remove the plate covering the brush roll, then you can get to the belt and brushroll.

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Turn vac. over, remove the buttom plate over the brush roll, then at the bottom edge of the top cover, using a flat blade screwdriver, insert into the slots and pry up to unlock the tabs, then the top cover will come off. Put the belt on the brush roll and feed the belt thru the opening and put stretch it over the motor shaft. Put the top cover back on and push to lock the tabs.

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