Our Mayag electric dyer still works but is making noises like a vibration. I also see some small black debris at top of filter frame, so maybe it is the rubber belt. I can't see what to take off first to inspect the internal moving parts. Is there somewhere a diagram of how to open up the dryer to see the internal parts?

THANK YOU. Today, I started the steps you prescribed above. I stopped after taking off the tumbler front boss. I already could see that the belt seemed to be in good shape, although it was flat and not grooved as I expected. I could see most of the interior and couldn't see anything vibrating to make the the rumbling noise. I did not take off the top lid because I did not see the two brackets holding down the lid with one screw in each (maybe I didn't look hard enough). I saw a plastic snap-in at the top front right and left underside of the lid but no screws. I was afraid to break the plastic joiners so I stopped before taking off the lid. Where can I look for a diagram about the lid and how it is attached?

THANK YOU