Edward K Sterling Heights , MI February 23, 2020 Appliance: Samsung Dishwasher DMT300RFS/XAC-00 Samsung Dishwasher Dmt300rfs/Xac-00: Lower spray arm kept falling off leaving dirty dishes. How to replace Assy-Nozzle(L);Dm1477. Installed a new nozzle holder and lower nozzle. The only issue I ran into was the pump cover rubber gasket was stretched. I put it in the freezer for awhile and it shrunk just enough so that I could work it into the channel. Dishwasher cleans perfectly now. Fast delivery on the new parts. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes