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

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Belt tension adjustment

My Hoover upright vacuum, model U6476-900, has a front agiator belt that is loose and slips on the agiator so it will not turn under a load. I replaced the beld, 385280-34, but its the same problem, too loose. Is there a tension adjustment on the tension roller? How is this tension problem corrected?

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If you are looking at the belt while the vacuum is in the upright and locked position, the belt will be loose. The idler removes tension so the brush doesn't spin while you walk away and put heat marks in the carpet. Hit the lever that allows you to move the handle low, like you are vacuuming under the bed, and the belt gets tight.

Posted on Feb 01, 2013

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Make sure brush setting is ON (carpet) not OFF (floor)

Posted on Jan 19, 2013

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Hi
There is no tension adjustment.
Id say you uswed the wrong belt. Hoover have many many sizes of belt. Check with your dealer

Rob

Posted on May 25, 2009

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Posted on Jan 02, 2017

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SOURCE: New Hoover belt nbr 385280-34 installed, belt still too loose.

There is no adjustment. As they wear they cut the groove in the roller deeper. Sure fix,and what Hoover will tell you to do is to replace the roller. If your like me though that isn't any good. so what I did was wind wax coated dental floss into the groove that the belt rides in and in and then put a couple of drops of super glue to hold the end and it works like a charm. Don't put too much in there the belt has to have a groove to ride in.

Posted on May 25, 2009

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1 Answer

How to repair windtunnel hoover agitator that will not turn


Likely a broken belt. Also check the agitator brush roll bearings (in either end under the end caps) for hair, strong, thread, etc. as this will make the brush roll harder to turn and wear/break belts prematurely. If all these check okay, then observe the tensioning roller that causes the V belt (runs from the idler pulley to the brush roller) to be sure it is swinging down when the handle is released to hold tension on the belt, causing it to rotate. These tensioning rollers can break, but often are locked into the "Bare Floor" setting without the user noticing. Slide the carpet brush roll selector (located on top, next to the floor height slide adjustment) back and forth and make certain it is all the way into the "Carpet" setting to allow the tensioning roller to engage. [Note: The tensioning roller is always retracted (in the neutral or off position) when the handle is in the upright position. You must release the handle to allow this tensioing assembly to engage.]

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The V-Belt is not adjustable. There are two ways the belt has no tension: (1) when the handle is upright, a mechanical lever takes the drive tension off the belt, and (2) the brush roll lever setting you described. The upper handle would have to be in the floor cleaning position to check the belt, not in the storage position.

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When upside down there is no resistance,on carpet there is.
You need to try a a fresh, genuine hoover belt and buy a spare, belts stretch and slip after 30 -90 a days of normal use, often to 25-30% oversize Hoover belts generally fit very snug. If your belt looks shiny inside, that is likely the issue. Try that and post results

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New Hoover belt nbr 385280-34 installed, belt still too loose.


There is no adjustment. As they wear they cut the groove in the roller deeper. Sure fix,and what Hoover will tell you to do is to replace the roller. If your like me though that isn't any good. so what I did was wind wax coated dental floss into the groove that the belt rides in and in and then put a couple of drops of super glue to hold the end and it works like a charm. Don't put too much in there the belt has to have a groove to ride in.

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There should be a belt tensioner for the V belt, maybe it is not contacting the belt when you tilt the handle back. If this is less then 1 year old, then it is under warranty, take it in to a warranty servicer for warranty repair.

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