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The Gates upper belt-drive pulley for 2014–2017 Peterbilt 579 with the Paccar MX-13 diesel is an accessory-drive pulley for the alternator and A/C routing. Installed in the upper belt run, it guides the belt and supports reliable accessory operation in heavy-duty applications. Replace this pulley during service when wear or bearing noise compromises belt alignment or accessory performance.
Gates 14-17 Peterbilt 579 Paccar MX-13 Diesel Alt. & A.C. (Upper) Belt Drive Pulley
