QSX15 Cummins Cylinder Liner Kit 4376392/5472978 Parts Catalog Ref No. Part Name Part No. Required 　 Cylinder Block 3686830 1 1 Fracture Resistant Screw 4966356 14 2 Ring Dowel 3678507 14 　 Rectangular Ring Seal 3685234 6 　 Cylinder Liner 3685235 6 3 Cylinder Block 3686829 1 4 Main Bearing Cap 3685552 1 5 Main Bearing Cap 3685553 1 6 …