6BT5.9 Cummins Oil Seal 5405392 Parts Catalog Ref No. Part Name Part No. Required 1 Hexagon Flange Head Cap Screw 3089188 2 2 Hexagon Flange Head Cap Screw 3901757 2 3 Hexagon Flange Head Cap Screw 3914177 6 4 Hexagon Flange Head Cap Screw 3900629 2 5 Threaded Plug 3904181 1 6 O-Ring Seal 3910260 1 7 Cover Plate 3908095 …