My dryer wasnt turning

I noticed my dryer wasnt turning so I decided to take it apart to see if I could fix it, I noticed my belt was almost to the breaking point and there was black dust everywhere. I looked at the idler pulley wheel and it didnt look right so i decided to replace that, the belt and noticed the felt pads were gone also and that can also effect the dryer turning so I replaced them also and put it all back together and it was working like it was brand new!