The below engine parts Cummins pulley are for the 4BT3.9/6BT5.9/6CT8.3/6LT8.9/ISDe/ISLe/ISZ/M11/NT855/ KT19/KT38/KT50/ISF2.8/ISF3.8/ISM11/QSM11 series Cummins engine. Part No. Part Name Part No. Part Name Pulley, Accessory Drive 3016012-20 Alternator Pulley 3701N-015 Pulley, Accessory Drive 3023473-20 Alternator Pulley A3920560 Pulley, Accessory Drive 3036449-20 Alternator Pulley C3281533 Pulley, Accessory Drive 3252107-20 Alternator Pulley C3284474 …