Hi Debra,
The answer lies under the "Power-Mate" light cover. Press the sides of the cover in and lift off the light cover. Remove the light bulb and the two screws that retain the power-mate cover, and then from the bottom spread the sides of the power-mate cover with a screw driver, this will allow you to lift off the power-mate cover and give you access to the brush and belt.
Happy New Year.
Sincerely,
Dan
Dan Hutchinson, January 2006