Question about Dirt Devil M087700SV Bagless Upright Vacuum

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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.

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Re: e drive problem. Self propelled feature drives in...

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

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  • 271 Answers
Re: e drive problem. Self propelled feature drives in...

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

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How do you replace the forward / reverse cable? 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. 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.

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