I just took apart the brush/roller and cleaned out. I am trying to put the head back on and make the beater bar roll and it will not. Are the green arrows supposed to be lined up when regular vacuuming? I tried that and it does not catch the belt--it only catches the belt when I line up the red arrows. I have a G3. Help
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Re: Belt not locking
With the nozzle off of the vac., turn the big knob on the front until it locks. (will only turn one direction) Put the nozzle back on the vac, lock it down, turn the knob again and the belt will be on the spindle and you should be set to go. I hope tho that you put on a new belt, they stretch after a short time and will start slipping under load.
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Shane: Unplug the machine and lay it on it's back with the handle release in the release position (the vacuum head should be laying flat also). Remove the foot plate from the vacuum head. Manually turn the brush roll (called a beater bar). The beater bar should turn fairly easily and the belt should turn the motor armature shaft (now would be a good time to check the inside surface of the belt for grooves or damaged spots which would cause the armature shaft to slip on the belt). If the beater bar has too much resistance to your turning it, I would suspect that the bearings at each end of the beater bar are fouled with hair, carpet fibers and string. Remove the beater bar from the machine and manually spin the motor armature shaft (where the belt contacts the motor) to see that the motor armature shaft spins freely. Remove the bearings from the end of the beater bar (they won't come off easily so you may have to use a prying tool such as a screwdriver). Try to spin the bearings. If they are fouled, dribble some rubbing alcohol into the bearing (I use a spray bottle... it's much neater) and turn the bearings while keeping them soaked with alcohol until they spin freely without ratcheting. Drop some 30 weight engine oil into the bearings until they are saturated, then clean the outsides of the bearings with a clean rag (no alcohol) until the outsides of the bearings are completely dry and no oil drips out of them (don't want the oil to attract dirt). You'll probably need to replace the belt. Reassemble the machine and it should work for you.
Ok, so I had the same ratching noise and took the advice of many sites directing me to clean the brush. But like most I cleaned the brush and the noise continues and the brush does not spin. Reluctant to take it to get serviced I dug a little deeper and now it works just fine. This is what you need to do as removing any hair from just the brush part will not be enough.
Remove the entire brush bar from the bottom of the Dyson, this means pulling the bar out of the drive belt. This is not to difficult just use a little muscle as the belt will stretch. Once the bar is out grasp hold of the two plastic end caps on the brush bar which the brush bar actual spins in. These two caps are connected by a slim metal rod which runs through the brush bar. Place one hand on each side and begin to twist and pull until one of the caps comes off. Once the cap is off of the one side you can pull the other cap from the other side through the brush bar as this cap will be the one attached to the slim bar I mentioned above. If like mine you will see a ton of hair wrapped around these caps and inside the ends of the brush bar. Clean them out as best as possible.
After you clean it out, run the cap with the rod back through the brush bar, attach the other cap and twist and push together. Make sure the caps lineup which each other just like they were when you pulled it out. You'll notice how much more freely the brush bar spins between the two caps then before you cleaned it. Now, pull on the drive belt and feed the brush bar back through and attach as it was to begin with. This did the trick for me.
The belt may be broken. Consult the user manual or locate on the sole plate or front hood when getting to the sole plate. Usually it involves a few cross head screws on the base of the vacuum cleaner where the roller beater bar is. Remove that and check the belt. If its broken, carefully replace it with a new one and see if that works once everything else has been put back.
If you lay it down and look under the base- by the brush roll- there are three screws you have to remove w/ a philips head screwdriver to get the base plate off. From there you can take out the brush roll, etc.
Does the power head motor stop, or does the brush roll stop. If it is the brush roll stopping, replace the belt and/or the brush roll. If it is the motor, you may need to clean out around the motor, it may not be getting enough air to cool causing it to overheat and stopping. That the brush roll plate off, take out the screw, and the top will come off, then you can check to see if cleaning is the answer, if not, the motor may be bad.
when you removed the beater brush did you clean all the lint and threads off the ends of the brush? you can unscrew one end of the beater brush plate to clean the crap off it. Inside the beater brush are two ball bearings. Use a light machine oil to lube these two bearings. re-assemble the rod and end nut. then put your brush back in the machine and note which direction the belt needs to be installed. there'll be an arrow on the motor housing.