Dirt Devil M087700SV Bagless Upright Vacuum Logo

Question about Dirt Devil M087700SV Bagless Upright Vacuum

2 Answers

E drive problem. Self propelled feature drives in reverse, but not in forward.

While vacuuming, the self propelled feature drives in reverse when the handle is pulled but not in forward when the handle is pushed. It is also difficult to push (pushing against a dead drive train). I have turned the vacuum on it's side while running to observe the drive's action relative to the handles operation. It drives fully variable in reverse, but the motor stops when the handle is pressed forward. I dismantled the switch in the handle & did not expect the magnetic proximity type sensor. Not fully sure how best to troubleshoot the switch, I put it back together. I suspect a problem in the motor now since the switch appeared to be a three conductor proximity switch & likely fine since it detects the reverse switch movement.

Posted by Anonymous on

  • Anonymous Oct 29, 2008

    mine goes in reverse, if i am pushing or pulling. No forward action at all. At least i'm getting a good work out, but it's still a pain.



2 Answers


I took the wires loose from the drive circuit card. Using the ohm meter to check for a broken wire, all three checked out fine. I then rigged up a set of jumpers that allowed me to jump across the terminals on the circuit board from the common to the two neutrals. Sure enough the drive motor works perfectly both forward & reverse. The magnetically sensetive transister type switch was the culprit. I have replaced the switch & it works great. I wish I could identify the transistor & only buy it & solder it in.

Posted on Jun 25, 2007


Fred Sops

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert that has over 500 points.

  • Expert
  • 351 Answers

This is basically the same problem with a Hoover power drive only the forward still drives albeit slowly and a slight "push" to keep it going. There has to be a common core type of drive failure !!

Posted on Jun 04, 2007


Add Your Answer


Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:


Self propelled clicking noise

check the cable that connects from the handle to the power drive. you might have broken a fastener between the two.
Dec 26, 2012 • Vacuums

I have the Hoover, self propelled vacuum. I have only used the self propel function a few times, but our babysitter used the feature and now the vacuum only works on the highest carpet setting. The middle...

Move the carpet height control switch to a higher position if the vacuum is difficult to push. If the setting is too low for the carpet being cleaned, the brushes press against the floor preventing the vacuum from moving easily.Set to a medium-high height setting then check.Slide the "Self-Propel" button to the "ON" position if the cleaner does not self-propel. -----------
The self-propel feature operates only when the cleaner switch and the self propel button are both ON. ---------- Try this settings and check.This should help.Thanks.Helpmech.

Self propelled feature does not work. I replaced

There is a cable from the handle down to the transmission on this machine that breaks all the time or the cable is mounted to a plastic piece that is broken. That will need to be replaced.

Self Propel doesn't work on Hoover Wind Tunnel

Your self propel wire could be broken. Lean the vacuum back like you were using it. If you stand in front of the vacuum look down and to your left. When you move the selp propel button you should see a wire move. If not then it's broken.

How do you replace the forward / reverse cable?

http://geeksquad.fixya.com/ThreadView.aspx?prdid=40485&thid=661987 How do you replace the forward / reverse cable?
Posted by HANDYBILL on Jun 10, 2008
I don't know how the end fits back on the replacement cable.

I would advise you to ALWAYS to FIRST UNPLUG YOUR VACUUM before beginning any service procedure. Hoover U6437-900 / U6439-900 Windtunnel Vacuum. There is a hook on the bottom of the vacuum and @ the top by the handle as well. You may what to get a schematic or owner’s manual to see how they hook up because of the newer and different Model #’s for Hoover. The Hoover Self-Propelled works on when the handle is lower to a comfortable position then the self-propelled drive may just need and adjustment. There is a self-propelled rod that controls the self-propelled feature and it either needs adjustment or replacement or the part that hold it may be broken but either one can be fixed. So feel free to contact your local vacuum cleaner dealer with questions. So if you need further assistance, please feel free to contact your local vacuum cleaner dealer in your area or in the yellow pages, or contact the factory phone number or website to further assist you with your questions.

http://www.hoover.com Telephone
Contact our Customer Service Department at 1.330.499.9499
Monday through Friday
8 a.m. - 7 p.m. EST

Thanks, Don the Vac Man
Go Ahead. Use Us.


Hoover self-propelled u6630-900 reverse not working

THe forward/reverse lever (made of plastic) possibly is broken. New part is about $10.00

Self Propel

Determine if the wheels spin freely or if there is resistance. Sounds like you need a replacement belt for the drive. If you need help with installation, let me know.

Kenmore direct drive will no longer self-propell

There may also be a reset button. If the brushes get stuck the unit can shut off power to the brushes to keep a total melt down from occurring. The reset button should return power in these types of vacuums.
Not finding what you are looking for?

Open Questions:


Hoover Windtunnel 3 air cordless vacuum: Broke the brush-head off the body & can't get it apart to fix it. I broke both legs off the Fork which holds the vacuum head to the motor housing / body of the vac while trying to engage the upright-position-lock. I can't get the remains of the swivel-piece off to glue the fork legs back on to it. I took the screws out of the motor housing, but the housing halves still seem to be joined by the swivel, and I don't dare pry too hard. Any help out there? ************************************************************* HEY! I figured it out! All I had to do was take out the chrome screw & washer at the pivot point for the brush-head (which I thought was the motor housing, but it's not), opposite the brush-head itself, and force the metal shaft which the screw was in out of the housing, which was hard as hell. I got another screw similar to the original (metric, M4 x 0.7 x approx 35mm long) and screwed it part way into the hole the previous screw came out of, then I hammered on it fairly gently but repeatedly and it came out the other side bit-by-bit. (If you use the original screw to hammer on, you'll destroy the phillips-head recess.) It's extremely awkward to figure a way to brace the vacuum against the hammer blows without damaging anything, but if it's not braced solidly I doubt the shaft will ever come out. I can barely believe a press-fit in a plastic part held SO tight!

See all Dirt Devil M087700SV Bagless Upright Vacuum Questions


Ask a Question

Usually answered in minutes!

Top Dirt Devil Vacuums Experts

David Shaub

Level 3 Expert

2991 Answers

The Knight
The Knight

Level 3 Expert

76835 Answers

Paul Bade

Level 3 Expert

1699 Answers

Are you a Dirt Devil Vacuum Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides