Cummins 4B3.9/6B5.9 Fuel Pump 4990601 Parts Catalogue Ref No. Part Name Part No. Required 1 Fuel Pump 4990601 1 2 Fuel Pump Gear 5256325 1 3 Fuel Pump Adapter 5254358 1 4 Fuel Pump Adapter 5254357 1 5 O-Ring Seal 3940386 1   Above is the introduction of the Cummins 4990601 Fuel Pump, while if you need any other Cummins …