White Knight C8317WV dryer – vibration and noise

Hi,

I’ve got a White Knight C8317WV dryer which is making quite a lot of noise and vibration. If I turn the drum by hand it sounds fine, it’s only when it’s actually running under power that it makes the noise. I’ve taken the back off and had a quick look, but nothing jumps out at me. The belt’s where it should be on the drum, not a lot of lint built up or anything. I thought it was the fan, but wouldn’t that make a noise when I turned the drum by hand?

I took a quick video of the noise https://www.dropbox.com/s/2hhdyi5677…dryer.MOV?dl=0

Thanks!