How do I change the belt on an Oreck Magnesium LW100?

Lori, I work at an Oreck store on the weekends and we have a special tool that we use to open up the side where you have the belt. Before we got the tool, we just used a needle nose plier and put the two points into a couple of the dimples on the hub for the two large wheels. The side that you need to take off is the side that has the little filter on the inside of the frame. By the way, you should clean that filter off occasionally as well. If you look on the side of the grey hub you will see a pictogram of two different padlocks, one locked and the other one un-locked. You will also see a pictogram of an arrow pointing to the locked padlock and you will need to use the pliers to turn the hub till it points to the un-locked padlock. You can then pull the side housing off and that will expose your belt. You may need to take off the brush plate as well so that it is easier to put your new belt on. Two screws is all that holds that plate in place. Take them out and lift towards the front of the machine. I usually find it easier to put the belt on the brush pulley first and then walk the belt around the motor shaft. Re-assembly is just a matter of reversing the steps you did to take it apart. Hope this helps!