Disconnect electrical supply, remove pump & drain hose connections at wash sump assembly. Remove optical sensor(twist release), pull 3 sump assembly slot retainers that hold sump to tub assembly, push complete assembly up thru the tub opening, disconnect motor harness at motor quick disconnect. Clean flange of tub, lightly lube new sump assembly outer gasket with jet dry liquid or liquid soap. Press sump into tub opening after connecting motor harness to motor, carefully aligning keyway in tub to sump ,(you may need assist holding the sump in place) then install all 3 slot retainers and reconnect optical sensor, pump assembly, drain hose and electrical. run rinse and check for leaks