Disconnect the dryer from the outlet.
Insert a putty knife between the top and front panel about 2 inches from the corner. Press in to release to retaining spring, and lift up the corner. Pull up on the top panel to release the other retaining clips, and maneuver the panel out of the way without disconnecting wires.
Using a Phillips-head screwdriver, remove two screws, one at each corner, which connect the front panel to the side panels.
Tilt the top of the front panel out and locate the wire connection for the dryer light. Disconnect the harness by pressing in on the tab and pulling out. Remove the front panel and set it out of the way.
Using a Phillips-head screwdriver, remove the four screws around the drum bulk head that are attached to the side panels.
Disconnect the belt from the idler pulley by pulling the pulley toward you and removing the belt. Lift up on the drum and slide it out of the front.
With a socket wrench, remove the nut that holds each roller in place. Remove the roller by sliding it off the shaft. Place the new roller on the shaft, and reattach the holding nut with a socket wrench.
Lift and push the drum back into position, and reattach the belt around the idler arm and drum.
Attach the drum bulk head onto the side panels with the screws.
Position the front panel back into place at the bottom. Reconnect the wiring harness for the dryer light. Push the top of the front panel back into place and attach it to the side panels with the screws.
Line the top panel back into place and push down to secure it into the retaining clips.
Reconnect the power supply to the dryer.