Hello, I recently found a partial solution, after reading in forums and watching YouTube videos I encouraged and put WD40, I made a general bathroom of that product to all the mobile parts visible and great the noise disappeared. I don't know how long it will last but I hope to change pulley and strap soon. But for now I recommend that spray lubricant, does not skate or anything and both the alternator and the hydraulics walk as always. Greetings and luck.