Having problems with your Hoover U6630-900 WindTunnel Bagless Upright Vacuum ?

Hoover self-propelled windtunnel belt pops off

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Answers :

The correct belt is a 38528035. If the belt does not have this number printed on it, it is a generic belt and probably the wrong one. The pulley on the transmission is "convex" because this pulley design keeps the belt running in the middle. (a belt will always try to "climb up a hill") If the motor shaft and the pulley are not aligned properly, the belt will constantly throw off. This can be a result of a bad motor mount (located inside the motor compartment.) The motor shaft end has a rubber cover that absorbs vibration and keeps the motor positioned squarely. The handle could also be loose on the pivot. It is held down by two metal clamps that screw securely to the bottom, holding the handle on to the base and allowing for the handle to pivot backwards. This problem can be difficult to diagnose and I have had many in my shop for repair. It takes a seasoned and experienced repairman to find a solution to this problem, in most cases. The disadvantage I have here is that I cannot see your machines to inspect all the various things that effect the belt alignment. I hope that some of this information will help.
Same problem of belt coming off metal shaft. Before giving up on vac decided to dig a little deeper. Removed the outer cover then the two little wheel assembly by bending the plastic catch back then popping out. Removed 4 screws holding the shaft with the black wheel that the two belts ride on. Quickly realized the nut that holds on the black wheel was missing. The guide wheel didn't fall off because it had no room to fall off the end. If the black wheel seems to rock around the bolt is possibly loose or missing. Realized the bolt is left handed threads. When I checked my indoor mini tool box amazingly here was one left handed extremely rare 1/4 nut that I must of found on the floor and saved. Runs like new now. To prevent the nut from rattling off again put some 2 part epoxy on the end of the nut/bolt. Lock tite, pvc cement, may also work. The nut seats into plastic so a lock washer is a waste. For my vac, the problem has seemed to get worse over time so I suspect the nut was slowly working its way off the long shaft. The design flaw is not putting lock tite at the factory or maybe the locktite degraded with the heat. Best solution would be a second left handed nut to lock them together. The threaded shaft is plenty long enough. Something to check if your belt is falling off.......
Repair Help & Product Troubleshooting for Hoover U6630-900 WindTunnel Bagless Upright Vacuum

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Suggested Questions/Answers :

Hoover self-propelled windtunnel belt pops off


The correct belt is a 38528035. If the belt does not have this number printed on it, it is a generic belt and probably the wrong one. The pulley on the transmission is "convex" because this pulley design keeps the belt running in the middle. (a belt ... Hoover U6630-900 WindTunnel Bagless Upright Vacuum

V-belt flapping on Hoover Self-Propelled WindTunnel Bagged Vacuum


... Hoover U6441-940 WindTunnel Bagged Upright Vacuum

Hoover WindTunnel Self-Propelled V Belt


I had this same problem with the V belt on my Hoover Vaccuum.\012\012There are three (3) basic things that will cause the brush roll not to spin.\012\0121. When handle is upright, brush roll is OFF.\0122. When switch is set for HARD surfa ... Hoover U6441-940 WindTunnel Bagged Upright Vacuum

Hoover Upright Bagless WindTunnel does not self propel (U6625-900). Belts are new, Brush turns strongly. Wheels propel forward very weakly and do not reverse when the handle is pulled backward. Is there a mechanical link from the self propel switch to the "transmission" ? Are there any gears that could be worn or not engaging properly?


... Hoover Self-Propelled WindTunnel Bagless Upright VacuumVacuum

Just replaced the belts on my Hoover Windtunnel II self-propelled vacuum. The brushes are now turning ok, but the self propelled feature is not working. Squeals when when you lock it in the upright position.


Check the plastic part, which the the self propelled cable is attached to. (release the handle, tilt it back. You should be able to see the cable attached by a screw to a black plastic arm.) It is either broken or the cable is lose. ... Hoover U6630-900 WindTunnel Bagless Upright Vacuum

Self-propelled Hoover windtunnel (with bags) will not self-propel. Belts are all in order, but I am quite sure it has to do with the cable. How would I fix this and how does the end of the cable with a nut, connect?


This might help - go to following website and look for "troubleshooting" \015\012http://www.fixya.com/support/p40544-hoo ... Hoover U6437-900 / U6439-900 Windtunnel Bagged Upright Vacuum

Belts I have a Hoover self-propelled windtunnel, purchased 6-04. It gets light use. I have replaced the v belt 3 times, once under warranty, and it must be replaced again. It appears to be in very good condition, but is stretched too big. When I purchased 2 v belts a year ago, one was already too stretched,but when my Dad took it back, the salesman put it on another model and said it was fine (Dad never mentioned this to me). Is there a way to adjust the vacuum to hold the belt tighter? Do t


It is the flat belt that gets stretched and should be replaced at least every 6 months. The V belt wears down so it won't it right in the brush roll V. Maybe the belt tensioner wheel has a problem, sometimes they get hook up and won't engage the V ... Vacuums

I have a Hoover self-propelled windtunnel, purchased 6-04. It gets light use. I have replaced the v belt 3 times, once under warranty, and it must be replaced again. It appears to be in very good condition, but is stretched too big. When I purchased 2 v belts a year ago, one was already too stretched,but when my Dad took it back, the salesman put it on another model and said it was fine (Dad never mentioned this to me). Is there a way to adjust the vacuum to hold the belt tighter? Do they re


Http://geeksquad.fixya.com/ThreadView.aspx?prdid=0&thid=675093\015\012Generic problem for all Vacuums\015\012I have a Hoover self-propelled\015\012Posted by kl ... Vacuums

Ihave a Hoover Windtunnel self-propel model U6445-920. The belt from the drive motor to the big wheel will not run in the center of the wheel. The belt runs about 1/3 off the wheel. I have tried several new belts and still the same problem. What do I need to do to repair this problem.


The large wheel may be worn off center. If the belt stays on and is not thrown, you can run the vac. if there is wobble in the wheel causing a genuine belt to slide off replace the wheel mechanism. ... Vacuums

Hoover self-propelled windtunnel U6430-900 flat belt gets hot & becomes hard to push. It has a filter bag. Purchased 8/2/01. Took one plate off bottom. Used a compressor to blow out dirt & dust. Put new thin belt on.


Belts get hot when fibers from carpet get wound arounf the belts mounting shaft. Best to take a razor and cut off any fibers so the belt doesn't get hot again ... Hoover Self-Propelled WindTunnel Bagless Upright VacuumVacuum

Hoover WindTunnel Self-Propelled V Belt


Hi, That is what was happening to my Windtunnel. Until I looked at the little round disk "plastic". there was a crack in it and this puts pressure onto that V belt to make the brush spin. I have a replacement idler arm assy unit which has to be repla ... Hoover U6437-900 / U6439-900 Windtunnel Bagged Upright Vacuum

Hoover windtunnel self-propelled vacuum is not suctioning, changed belts, new bag what is the problem and i have checked the hose.


Have you cleaned the filters? ... Hoover U6437-900 / U6439-900 Windtunnel Bagged Upright Vacuum

Good Morning, A friend recently gave me her Hoover windtunnel model U630-900 vacuum. It is a self propelled vac. It comes on but is hard to push and will not really pick up any dust particles on the carpet. It has a funny smell also. I saw where one of you Q & A you said to check the roller brush. I thought maybe a belt may be off or something, but I do not have a manual to know where to begin checking. Could you tell what to check and also if there is anywhere online to download the manua


... Hoover Ultra U6430-900 WindTunnel Bagged Upright Vacuum

I have a Hoover self propelled WindTunnel vacuum( Model U6425-920) that stops in the middle of cleaning. I have changed the flat belt and I'm still experiencing the problem. I usually have to wait an hour or so b/4 it would work again. Any advise?


Http://geeksquad.fixya.com/ThreadView.aspx?prdid=0&thid=632298\015\012Generic problem for all Vacuums\015\012I have a Hoover self\015\012Posted by thjunk2007 o ... Vacuums

Hoover self propelled bagged windtunnel upright model #U6435-900...how do you remove the green plastic shell cover to get to the part that secures the v belt...we need to secure the bolt and cannot get the area. Brushes and transmission wheel not rotating? thanks


Greetings from GoVacuum,\015\012\015\012Here's a great video repair tutorial that we've put together to try and help you with the repair on your Hoover WindTunnel. I hope that this helps you with your repair. If you found this solution ... Hoover U6437-900 / U6439-900 Windtunnel Bagged Upright Vacuum

I have a Hoover WindTunnel, Self-propelled model, and it was working great until I ran over a portion of the cord, then it started making a bad noise and I noticed the roller is not moving consistently...I suspect I may have stetched the V-Belt...do you think so?


The V belt usually wears down first. Remove the roller and belt to visually check for wear and belt material in the roller pulley. I would change the flat belt as well. Also, replace the cord if any wires are exposed ... Hoover U6437-900 / U6439-900 Windtunnel Bagged Upright Vacuum

Belt slipped on my hoover self propelled windtunnel


Please give additional information?\015\012\015\012Sometimes belts can be mounted in 2 directions.\015\012If installed in the wrong direction, the roller will rotate backwards\015\012and the belt can come off.\015\012Also, it is possible that t ... Vacuums

Hoover windtunnel self propelled vacuum has new belts but brush won't turn on carpet


... Hoover U5753-900 WindTunnel Bagless Upright Vacuum

I am trying to replace the cable and actuator on a Hoover windtunnel self propelled vacuum. but I cant get the top or hood off the get to them, I have removed all the screws I can see, roller, belts..what am I missing?? thanks so much for any help


Hi there SmartAlec from NelsonVacuums.com.au here. You will need to remove the knobs for carpet/hard floor selection and the carpet height to remove the cover they act as k ... Vacuums

V belt on hoover windtunnel self-propelled will not tighten to turn brush


Is it stretched or worn? If it is you can get a replacement here:Windtunnel V Belt ... Vacuums

Hoover Bagless Windtunnel - Self Propel feature not working


I have the same problem with ours. If you lift the vacuum by the handle it breaks the lever on the transmission. You can find a replacement cable and lever on line for about $16.00 it is somewhat involved to repair but can be done by someone with mec ... Hoover Vacuums

Brush Roll belt stops turning durring vacuuming on WindTunnel self-propelled, v belt is a little loose with handle down. Tensioning roll is engaged OK, but fully at the end of its travel. Replaced belts flat and v, but still stops turning even on high carpet setting when vacuuming. Carpet setting and height adjustment appears to be working OK, roll is clean and turns easily when out. Also turns easily until it engages the carpet. Self propel function works just fine.


... Hoover U6485900 Bagged Upright Vacuum

I have a Hoover power max self propelled vacuum. The belt that goes to the self propelled part keeps slipping off. I've had the belt replaced, but the problem persists. What can be wrong? I've taken it to a Sew N Vac repair, but all he did was replace the belt again. And it still has the same problem.


I can guess of one problembelt gets removed when motor is running right?am assuming that belt is fit tightly and fits correctly when motor is in restif so then ur motor is not running at a proper speed which can be a pos ... Vacuums

Hoover Self-Propelled WindTunnel U6436-900 cable problem


The flat belt should be changed if it has been longer than 9-12 months. Next I would remove the upper handle to inspect the top section of the control cable, sometimes it fray's and has a sponge feel (no positive control) to self propel. To set this ... Hoover U6437-900 / U6439-900 Windtunnel Bagged Upright Vacuum

Self-propel not working on my Hoover Windtunnel


... Hoover Self-Propelled WindTunnel Bagless Upright VacuumVacuum
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