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Re: My Hoover U6439-900 also losing belts
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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Hi! The brush-roll feature needs to be engaged for the belt to tighten, so when checking the belt it will appear to be loose. Be sure you have replaced both belts on the vacuum with genuine Hoover parts. This unit takes belt 38528034 and 38528035. Also, make sure the vacuum is on carpet mode. Follow the link to view the instruction manual which provides instructions and illustrations on changing the belt to be sure it is assembled properly. http://hoover.com/file/509/
Hello! If you are using the cleaner on carpet, it is necessary for the brushes to rotate to assist the motor with maximum pick up. If your brushes are not spinning check the belt to make sure it isn't broken or stretched. The belt will need replacing about once a year. Below are steps for checking the belt on your U5399-900.
1.Place handle in low position and turn cleaner over so bottom side is up. 2.Remove the 4 screws. Lift off bottom plate. 3. Inspect the belt for rips and tears. If it is damaged in any way, broken or stretched replace the belt
This unit takes belt 38528033. Be sure you replace belt with genuine Hoover parts. Here is a link where you may go to order a replacement belt.
Turn the unit upside down and on each side of the roller brush is a red piece of plastic with screws remove and take off roller then you will see the belt drive stem place around stem and on roller and pop back in, Reassemble. Steve
Replace the belt with afresh, proper sized one. Yours is stretched. It will be shiny on the underside. hoover belts are meant to fit snug. Check the bearings on the end of the brush roll to remove dirt and thread. The proper belt will need to be stretched into place using the brush for leverage. Likely that your low carpet is more dense causing enough drag to throw the stretched belt.
Turn the carpet head upside down and look for visible screws at the front edge of the bottom plate. Inspect for others further back .Once removed the plate should hinge forward and separate from the base. Clean burned rubber from motor shaft and spin brush roll when replacing belt to check for wobble or hair and fibre wound in to ends of brush.
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.
when you released the end to slide the new belt on it allows the tension roller to slide into the wrong position. Remove the top so that you can see the roller, at the left side of the roller mechanism there is a screw, loosen it enough to allow the roller to return to the correct position.
You got the second hardest part done; the hardest part is what you're asking about. To get the new belt onto the drive shaft I used a long screwdriver for leverage and wrapped the end close to the shaft and with some elbow grease, got it to "slip" on to the shaft. It took a couple of tries, but once I overcame the fear of the belt breaking (because it has to stretch big time), I managed to get it one. Of course, the other end of the belt has to be wrapped around the roller first. I found a link for a tech manual for this model, but it didn't help much.... good luck.
·Sometimes grabs the carpet for no reason. ·Comes back too fast when I push it back.
I would advise you to ALWAYS to FIRST UNPLUG YOUR VACUUM before beginning any service procedure.
Self-Propelled WindTunnel by Hoover U6445906
Without knowing the brand name or model number you may have the height adjustment to low and the vacuum will say “bite down” on the carpet of which will make the belt burn and might leave marks on the carpet – and if you have a self-propelled vacuum it does come back fast if you because you have a transmission just like a car and you have to control the speed of the vacuum or because it may have a weak belt the vacuum will pull back easier – I really would like to know the brand name and model number so that I could accurately give a better answer . Recommended belt change for flat belt(s) are 4 to 6 months for better cleaning and one a year for a geared belt – both can stretch and lose their cleaning function
You should not use this powerhead on any natural or oriental fibre carpet. If you check the brush roller, you will see that the bristle extends out the bottom of the powerhead quite far and that the bristle is very stiff. This is o.k. for synthetic carpets, but will be too aggressive on natural carpet. It will pull material out of the carpet and eventually thin it out. You should use a passive air turbo or a carpet tool for this rug.
As far as the belt is concerned, if it is over a year old, it is due to be replaced. Old belts are stretched and will come off because they are worn out. You might also check to make sure the motor is in place correctly. It is very common that when people want to check the inside of the powerhead, they commonly remove the three screws that secure the motor, thinking that these screws will open the powerhead. If you observe the area between the screws, you will notice that there is a "no screwdriver" warning there. The four screws for the hood are recessed and not as obvious as the motor screws, so this mistake happens quite a bit.