Angelo,

First thing to doe, in make cure you unplug the power cord or turn the breaker off at the breaker box.
Remove the lint filter from the top and remove the two screws holding the filter housing/track to the dryer top. With a putty knifr or flat bvladed tool press in on the spring clips located in the seam between the top and the front panel, and lift up on the corner of the top. Block the top up with a support rod, or lean it back against the wall carefully. Remove the front lower access panel, loosen but do not remove the two screws holding the bottom of the front panel to the cabinet frame. Remove the two screws on the inside of the front panel, up near the top. Hold the drum up, and pull out on the top of the front panel, Disconnect the wires from the door switch assembly, then lift up and out until the drum disengages the drum opening on the front panel, and set the panel aside. you now have access to the drum belt idler assembly and motor pulley. Reverse the procedure and test the dryer for operation.

Good Luck,
:) :) :)