Cummins 4B3.9/ISF2.8 Fuel Pump 3976801 Parts Catalogue Ref No. Part Name Part No. Required 1 Fuel Injection Pump 3976801 1 Above is the introduction of the Cummins 3976801 Fuel Pump, while if you need any other Cummins spare parts or complete Cummins engine, Please further consult our sales.