Why wont by belt stay on the motor rod shaft?

The belt goes around the brushroll before you install the brushroll in the nozzle compartment, you must then twist the belt lifter casting which will rotate the belt lifter hook to lift the belt into the proper location to allow you to install the nozzle compartment on the vacuum. Then rotate the belt lifter casting to release the belt onto the motor shaft.

Hi there! The belt connects to the metal motor shaft rod on one end and the brush roll on the other. Follow the link below to view the instruction manual for the M085845 which includes step by step instructions as well as illustrations on changing the belt. Hope this helps!

http://dirtdevil.com/file/661/

the motor spins around a steel shaft that sticks out on one end, and the belt is driven by that shaft, belts are easily damaged and broken, meaning roller wont spin. Often a burning smell of rubber is noticed after motor shaft spins on stuck belt. cause is always hair./string/something at the three contact points. motor shaft and belt, roller and vacuum body become clogged. become familiar with taking cover off roller/belt, and cleaning Checking moving parts roller/belt come out easily and simple to clean...keep spare belts.

Sounds like the belt could be slipping causing friction. Try running without the belt just to eliminate the motor.If the shaft stays cool (as I am sure it will) try a new belt.there is a possibility that the brush that is being driven by the belt could be stiff with a build up of debris around the spindle.good idea to check this as well .

The belt is bad. Been sitting too long. Replace the belt it will work fine. Explanation why is here:


http://www.vacuummedic.com/blog/2012/10/09/my-brand-new-vacuum-doesnt-work/

There is not a pulley missing, when the belt is tight the shaft will turn the belt but when the belt loses elasticity it will slip on the shaft when being used on the carpet. Replace the n
belt at least once or twice per year.

Be sure to unplug your vacuum from the electrical outlet before proceeding!

-Turn your vacuum upside down so that the handle is resting on the floor and nozzle portion is resting on a work bench.
-Remove the 2 phillips screws from the metal bottom plate and set the bottom plate aside.
-Look at the right side of the brush roll. You will see a bent metal rod that attaches to the brush roll end cap. This is the clutch rod that allows your brush roll to spin or not depending on the position of the carpet/floor switch on the top of the nozzle. Pull this rod out of the brush roll clutch only. Leave the switch end of the rod where it is and just let the rod rest there.
-Pull the brush roll and old belt out and dispose of the old belt.
To install a new belt; put the new belt on the motor shaft first, next put the other end of the belt over the end of the brush roll and stretch belt and brush roll back in to place. Notice that on the brush roll end cap opposite of where the clutch rod goes, there is a metal piece with a slot cut into it. Be sure that this slot mates with the plastic stop in the nozzle so that the end cap cannot move.
Snap the clutch rod back in place and rotate the brush roll by hand to make sure the belt is not pinched.
Replace the bottom plate.

Your belt is worn and stretched and so it is slipping on the motor drive shaft. That is why it is noisy and smells like burning rubber. You simply need to replace the belt. You can get replacement belts here:

Replacement Vacuum Belts

The belt just goes from the motor shaft to the brush roll. Do the ends of the brush trun freely, or is one of them froze up, if so replace the brush roll. If it is ok, try to turn the brush roll by hand, maybe the belt got pinched and won't move.

That metal rod is probably the motor shaft or pulley. On some of these, the open space between the shaft and top cover is very narrow. You just have to push thru th opening to around the shaft, then put it on the brush roll. Th belt will stretch enough to re-install the brush roll.