I have a Hoover pet cyclonic upright model uh70085. the brush won't spin, I thought maybe the small belt was stretched, I ordered the correct replacement belt and replaced it, I still have slack and the brush won't turn. the floor and brush adjustment seems to be working correctly. Thanks, Tom

SOURCE: Hoover wind tunnel cyclonic U5780900

Well, the V belt is normally fairly slack until the handle is dropped below 45 degrees, which is when the belt tensioner assembly drops into place. If turning the brushroll by hand when the vacuum is in this position fails to rotate the self propel pulley, the tensioner is not functioning properly and will need to be replaced.
Also ensure that the brushroll can spin freely by hand, as these have a tendency to melt at the ends and seize the brushroll. I have also seen the groove that the v belt fits into melt itself out of round, which can cause the same symptom as you're describing.
Keep in mind as well that while the rubber belt may appear to be ok, it does have to be replaced every 3-6 months whether it breaks or not. Even though it hasn't broken, if you were to hold it up against a new belt, you would see that the old one has stretched significantly: which can decrease the machine's ability to rotate the self-propel transmission pulley and, in turn; the brushroll.

Feel free to contact me with any further questions.

-R

SOURCE: just bought a hoover upright windtunnel cylonic weird noise

no, brush roller shouldn't be touching anything,its under warrenty so take it to a hoover repair shop with your proof of purchase and they will fix it at no cost to you.something like that they might be able to fix it while your there because it won't take long. please leave feedback

SOURCE: My vacuum's cyclonic action is not spinning and

The following filter in your in your dump cup needs to be replaced.
F24 Dirt Devil "I" Bagless Upright Vacuum Replacement Filter Style F24 Part Number 2LT0360000

SOURCE: dirt devil vacuum cleaner--trouble vacuuming dirt

Try replacing the belt. Rubber belts stretch out after about a year.

SOURCE: Brush bar can't spin

Hi There,

Actually I just answered a question almost identical to yours! The belt on his model continiously snapped also.

I walked him through how to check the problem, and he was able to get his vacuum fixed. It really sounds to me like your brush roller has gone bad as well.

How to Replace the belt & Roller brush on a Dirt Devil Featherlite:
http://www.fixya.com/support/t4672507-eats_belts_immediately

Also here, another link to the exact roller brush that your model take on our website if you haven't already purchased one.
http://www.govacuum.com/rdd380.html

I hope this helped your your vacuum!

Chris Jones
GoVacuum.com

Here's the link:
http://www.dirtdevil.com/manuals/?id=5a3b999e-1922-401c-a419-69d2e2d13c78

Testimonial: "So grateful for your help!!!"