Dirt devil model #UD40180

SOURCE: Dirt Devil M084600 Dynamite

Your roller won't turn. The belt is designed to break if anything threatens to keep the motor from turning. When you have the roller out, check the end caps to see if they rotate easily. If they do, then install a new belt being very careful that the belt is not pinched on the channel that it sits in. Once you have the belt installed, turn the roller by hand to make sure that there is no jamming or catching of anything. Install the plate and check the rotation again. Once you are satisfied that the roller turns easily, try the machine.
If the caps on the roller are jammed, as they will get from debris, hair and thread, etc., then you may have to replace the roller. The end caps on most of the Dirt Devils are carbon fibre and will break when you try to remove them.

SOURCE: Instruction Manual needed for Dirt Devil upright model 088305

http://geeksquad.fixya.com/ThreadView.aspx?prdid=89362&thid=642772
Instruction Manual needed for Dirt Devil upright...
Posted by Innahouse on Jun 03, 2008
Describe your problem I need an instruction manual for a Dirt Devil upright model 088305.

Hello,
I would advise you to ALWAYS to FIRST UNPLUG YOUR VACUUM before beginning any service procedure. Dirt Devil Model #M088300 Upright Vacuum. The best idea is to contact the Royal Customer Service Dept and give them the model 3 and serial 3 of the unit you are requesting the owner’s manual for, I will give you the website address and phone # listed below:
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://royalvacuums.com/ Customer Service 1-800-321-1134
Hours are: 8:00 AM to 7:00 PM (EST)
Thanks, Don the Vac Man
Go Ahead. Use Us.

SOURCE: Dirt Devil Reaction Vacuum belt replacement

The manual is confusing - I had the same problem. Make sure you put the belt around the smaller motor axle, not the lever arm attached to the on/off foot switch. It's a bit counter-intuitive, but that was my problem with this. Jeff

SOURCE: Dirt Devil vacuum M85845 broken belts. Can't get

call all-type vacuum &janitorial supply.lisa can help you.314-275-8006

SOURCE: where is the belt on the dirt devil vision turbo

the belt is to the left of the brush. You need to revome the plastic covering (4 screws) to see it.