My husband and I ran into to same problem. While I ran to the computer to find help, he started to take it apart. First of all remove the 2 screws from the bottom. Next there are 2 press in type clips. Press clips inward and apply even outward pressure to the frame in front of the brush up and it will snap off.
Lastly, apply even pressure to the upper housing while the vacuum is standing up. It should come off with a snap. Replace belt and reverse instructions. Be careful not to use too much pressure as you may crack to plastic. Also make sure your clips are center to come through their holes when replacing. Hope this helps.
When you think of it, this is how new sales happens!!
Valerie
September 2009