I changed the belt on my dirt devil jaguar and can't get the front wheels back in the right place

SOURCE: dirt devil vacuum belt

on the bottom of vacuum ther are 4 screws take them out then a cover should expose the roller the belt is right there

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: 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: How do I change the bag on a dirt devil model 103?

On the open end of the bag that slips onto the vacume, there is a cloth "tab" sticking up from the band. Take hold of this tab and lift up while easily pulling back until you see the band about half way off the vacume. Now, you can take hold of the band and pull the bag the rest of the way off. You will notice that there is a "rib" in the middle of the band on the side that faces the vacume. That rib fits into the groove where the band goes on the vacume. When you install the bag put the band on this groove and work the band on around the housing. You can center the "tab" anywhere, just place it where you can get to it easy. The other parts you need are on the internet, I found them all including that rubber plug called the "attachment port" plug. The p/n for the replacement part is 3-201744-601. The original p/n is 3-501744-601 but you'll be better looking for the replacement part number. Good luck!

SOURCE: how to put the belt on the deit devil breeze

Here is a detailed discription on how to change your belt. Turn the machine compleatly upside down and place head on a flat surface. There are 4 screws to take out, then remove the base plate. Near the back of the channel the belt rides in you will see a stright silver shaft. Place the new belt over that shaft. The put the brush roller through the belt, so the belt is in the notched out section of the brush roller. Grab both ends of the brush roller and pull till the brush roller is back in it's origial spot on the base of the vacuum. Turn the brush roller 3 compleat turns backwards, then do the same forward to seat the belt. Put back on the base plate and put back the 4 screws. You are now ready to vacuum.