Impeller Kit Replaces Sherwood 26000K Cummins 3972366 New Impeller Kit , Includes Impeller and O-ring . Threaded for use with puller Replaces Sherwood 26000K-SHW , SHE26000K , SH-26000K Replaces Cummins 3972366 Fits Pumps: G2601-01 , G2601-02 , G2601-03 , G2601X , G2602-01 , G2603-01 , G2603-02 , G2603-03 , G2603X , G2604-01 , G2605-01