49201057000B Diebold Opteva 1.5 CAM Stacker Timing Pulley The 49201057000B CAM Stacker Timing Pulley is a direct replacement timing pulley for the stacker module of the Diebold Opteva 1.5 and ActivDispense 1.5 cash dispensers. It transfers drive from the stacker motor to the CAM mechanism so that notes are lifted, stacked and presented with correct alignment. Worn or cracked pulleys cause belt slip, note jams and stacker error codes, so replacing the pulley restores stable