Joseph T Oak Park , IL May 21, 2018 Appliance: Frigidaire Dishwasher FDB750RCS0 Frigidaire Dishwasher Fdb750rcs0: Rusted upper rack assembly. How to replace Upper Rack Assembly (Dishwasher). The new rack was a perfect fit. Just followed the steps in the video to remove the rack and remove the spinner from the old assembly, attach it to the new one, insert into dishwasher, and done. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes