The below engine parts Cummins crankshaft 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 Name Part No. Part Name Part No. Pulley, Fan Belt 4914077 DCEC Crankshaft Pulley 3943978 Pulley, Fan Belt 3655704 DCEC Crankshaft Pulley 3954949 Pulley, Accessory Drive 81B04-03002 DCEC Crankshaft Pulley 4896773 Pulley, Accessory Drive …