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

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The bar brush does not spin. I opened the vacuum head and the drive belt to the bar brush is loose. I don't see how you remove the slack from the belt.

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You have to have it in the carpet setting in order to put pressure on the v-belt. there is no way to tighten up the v-belt, but i would try to replace the big flat belt. if you haven't changed this belt in over 6 months, i would change it. ( on average belts need to be changed every 6-8 months). the reason is that the belt streches over time and doesn't have enough tention to ingage the v-belt in order for the brush to work. hope this helps

Posted on Aug 06, 2009

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Posted on Jan 02, 2017

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My beater bar is not spinning on my Dyson DC39. Ive taken the head apart and see no reason why it wont spin. Any ideas


Hello, this is Ava with Think Crucial.

There are a number of reasons why your brush roller has stopped moving. General maintenance to your vacuum is crucial and will help it work at peak performance.

First things first lets focus on the brush roller. Unplug the vacuum and turn it on its side. Look for any noticeable clumps of debris or hair strands that may be caught in the brush roller. Remove these obstructions, probably best to do so with a scissor if it's hair or long pieces of carpet fibers. After removing the debris try manually rotating the brush roller to uncover other hidden clogs. Another thing to take note of is the condition of the bristles on the roll itself. Are they loose or worn down? These are signs that your brush roller is in need of replacing.

While checking out your brush roll you might as well take a look at your vacuums belt. Your belt should be replaced about every three months. After regular usage, the belt will stretch out, lessening the tension on the brush roller. Lesser tension diminishes the brush roller's turn rate and speed. If the belt feels loose then it certainly is affecting your vacuums suction as well as your brush roll not moving at all.

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hope this was helpful.

Ava B.
Think Crucial Customer Care
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Jan 03, 2017 | Dyson Vacuums

1 Answer

Dyson DC25 brush won't spin when touching the floor. If I lift it off the floor it spins, once it touches the floor it stops. Any idea what the problem is?


I can think of three things that could be wrong.

The easiest one is that the brush has hair and fluff wrapped around its bearing. This happened to me and was causing a burning rubber smell. Turn it over and remove the base plate. Lift the belt by putting a piece of cord under it and slide the brush out. Remove one end of the brush and slide the spindle out. Clean all the hair out and reassemble.

The internal drive belt is worn, or the nylon bush that it runs on.

The clutch is worn out.

The last two are not as easy to fix as the main drive belt is enclosed in the centre of the clutch. There are videos though that show you the process. Have a read and a watch, but try my first tip first.

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  • Mar 18, 2016 | Dyson Vacuums

    1 Answer

    How do I get the brush bar to spin?


    Is it belt driven? Have you disassembled that part to make sure its not clogged with much and pet hair? Is the belt slack? it has to be tight.

    May 16, 2015 | Dyson Dc50 Animal Bagless Upright Vacuum -...

    2 Answers

    When the head is down and the brush is engage for carpet use, the brush does not spin. At the same time there is a high pitch squeal that is heard. If I lift the handle up, lifting the head and the...


    This sounds like a belt issue to me. The belt usually runs from a drive shaft to the rotating beater bar / brush. Both the drive shaft and beater bar / brush that are contact with the belt must be clean. Oils, etc. can interfere with the grip on the belt. If the belt is squealing for very long, the drive shaft can damage the belt. make sure you're using the correct belt - and have all the parts in their right places. Recheck your work and provide the vacuum make and model if you're unable to get it working properly.

    Feb 24, 2015 | Vacuums

    1 Answer

    How do i know if the belt needs to be replaced in my hoover spin scrub


    Remove the brush cover. Check belt for cuts or stressed areas.
    Is the belt taut or stretched to the point of being loose. If you see
    any of this replace with the correct size. Pull brush bar out of the
    side slots and remove belt from motor pulley. Place new belt on
    pulley and onto grooved area on the bar....stretch forward and
    push back down into side slots. Remember....groove in brush bar
    must line up with pulley. This is also a good time to remove hair
    and other stuff from the brushes and bar.

    Regards,
    Dennis

    Aug 22, 2014 | Hoover SteamVac F5914-900 SpinScrub...

    1 Answer

    Why does Beater Bar Fail to turn


    Per owner's manual
    1. Make sure the brush control is set on carpet mode.
    2. The brush will only spin when the handle is reclined.
    Others:
    The belt has worn out and needs replaced. Although it appears okay, stretching is possible, which would result in too loose a grip to turn the bar.
    If the belt was replaced, it may not have been pulled tight enough to turn the bar. To tighten on many vacuums, simply loosen the screws on each end of the brush, pull toward the front of the power head and hold while tightening the screws.

    Jul 25, 2014 | Dyson DC14 All Floors Upright Vacuum...

    1 Answer

    Belt no longer turns the brush


    JKGonzo:
    You'll need to open the vacuum head and remove the beater bar. Clean up the bearings at each end of the beater bar and reassemble the head.

    May 25, 2013 | Rainbow Vacuums

    3 Answers

    Why wont the brushes spin? I have had this machine for about 3 years and it has always worked great, tonight the brushes will not spin at all, it still sprays and sucks up the water. We took the brushes...


    In this machine there is no belt. The brushes actually spin by vacuum and in the turbine assembly there is a small wheel bearign which rusts out. You will need to remove and repair or replace the turbine and gear assembly P/N should be 43191009

    Feb 10, 2010 | Hoover SteamVac Carpet/Upholstery Deep...

    1 Answer

    Twirly thing under the vacuum has stopped spinning


    there is a belt that drives the beater brush. flip the unit over, you can remove the bottom cover by removing a couple of screws. to one side of the brush you will see a channel where the belt should be. go to you local walmart, sears or hardware store and in the vaccume section they will have belts, on each bag of belts will be a list of vaccumes that belt fits simply find yours. with the new belt simply lift the beater brush out at the belt channel side and install the belt around motor shaft and brush. then place brush back in place , be suer brush guides are in properly. this should do ya.

    Aug 18, 2009 | Dirt Devil Featherlite Bagless Vacuum...

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