ISX15 Cummins Water Pump 4972857 Parts Catalog Ref No. Part Name Part No. Required 1 Connection Gasket 3027924 1 　 Water Transfer Connection 3328559 1 2 Water Transfer Connection 3821718 1 3 O-Ring Seal 3892095 1 4 Hexagon Flange Head Cap Screw 3900631 2 5 O-Ring Seal 2863701 1 6 Hexagon Head Cap Screw 3034836 3 　 Water Pump 4972857 …