While you wait for answers, we may have found some information which could help you.
Click here for Top Cover FindWhy is my dirt devil so hard to push forward?
How to repair dirt devil ultra vision vacume?
dirt devil ultra vision turbo?
won't suck?
Upright bagless dirt devil will run but will not pickup dirt from carpet?
How I can fix my Dirt Devil 1400W Cylinder Vacuum Cleaner?