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Alternator Decoupler Pulley | NAPA Belts & Hose

NAPA Belts/Hose ADPs cover more than
20 million vehicles worldwide.

Alternator Decoupler Pulleys, or ADPs, allow the alternator to disengage from the accessory belt drive during rapid deceleration of the engine, reducing stress placed on the system by the spinning mass of the alternator. This in turn reduces vibration, excessive tensioner movement and shock to the bearings in the various components of the system.

With the use of an ADP, all of the components of the Accessory belt drive last longer and operate more efficiently. NAPA Belts/Hose offers a full line of ADPs including Overrunning Alternator Decoupler (OAD) pulleys and One-Way Clutch (OWC) designs. Download an ADP Brochure to learn about our full line of products, including OAD pulleys and OWC pulleys, or check out the ADP Tool Kit to find everything you need for dependable, trouble-free ADP removal and installation.

To learn more about Alternator Decoupler Pulleys, click here.

For the most recent ADP Flyer, click here.

For the ADP Brochure, click here.

For the ADP Spec Sheet, click here.

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