Does anyone know what this pulley wheel below the alternator is and does? I had a belt that ran from it to the alternator and then over to the fan and the main drive pulleys that busted a few weeks ago. I got a replacement belt but the pulley is jammed. The car seems to run fine without it but I want to make sure. I know the attached picture sucks but the others I took are too big to upload so I'll have to take smaller ones later. Any help would be appreciated.
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