First unplug the dryer,then remove the front bottom panel.With your 5/16 nut driver reach to the rear of the vent tube under the dryer and remove the lone screw that holds the tube in place.Lean the dryer forward and remove the tube from the rear of the dryer,this will allow you to see and reach the idler wheel from the front.Release the belt,feel for the clip that holds the wheel in place on the opposite side of the front,with your thumb nail or something else if preferred pry out on one side of the clip until it pops off.slide the wheel off being careful not to lose the washer,slide the new wheel on and replace the clip.put the belt back on replace the tube,which is actually the toughest part because you have to find the hole for the lone screw as you can't see it,but with a little patience it is easily enough done.Put the vent hose back on replace the front panel and plug it in and go!!It took me 30 min.Alittle tough to feel for some of the parts,but really much easier than you would think.