Anthony C Mamaroneck , NY February 15, 2016 Appliance: Frigidaire Dishwasher FMB330RGS0 Frigidaire Dishwasher Fmb330rgs0: Water was not getting to top rinsing propellor. How to replace Nut. Unscrewed the old nut which was missing the black rubber ring. Screwed on the new nut. I needed pliers to unscrew the old nut because it was stuck. Tightened the new nut by hand. 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes