They don't show anything on disassembling the comp. I got no idea on Air Con, work. The type of cars that I worked on didn't have them.
But I do remember removing the clutch on a Nissan to replace the burnt out winding. The bolt in the center, removes the clutch plate, and a central nut for the pulley. When putting it together you shim the clutch plate for free clearance.
Harvey.