INA Overrunning Alternator Pulley/Decoupler (OAP/OAD)

Function, Benefits and Replacement of an Overrunning Alternator Pulley/Decoupler

In modern engines, overrunning alternator pulleys or overrunning alternator decouplers are used to reduce belt vibrations and noise and thus increase the lifetime of other drivetrain components. Compared to a solid pulley the OAP/OAD offers many advantages. These as well as the functioning and the correct replacement using our INA OAP/OAD special tool are explained in this 5 minute video.