Loud rattling noise and burning rubber smell - Admiral AAV7000A

I'll bet the machine uses a belt drive, and the belt is probably worn, slipping, and chipped. The slipping makes it hot which makes the burning smell, and the rattling is the spring-loaded tensioner pulley banging against its limit because it hits the damaged part of the belt every time it comes around. Before you look anywhere for a new belt, take my advice and look in an autoparts store first. We went everywhere to find a belt for my friend's machine, which was expensive and would have to be ordered, then we got one at autozone for $5. You can probably just take off the front of the machine to open it but you might have to move or disconnect the motor from the machine to get the belt free.

The water pump has cloth built up inside causing the impeller to shift. The shim that holds the pulley on to slipped and was causing rattling until it eventually jammed up completely. I removed the water pump cleaned the inside out and realigned the impeller and pulley assy. no parts needed.