Answer V, If the spray arm has separated from the water supply tube, you will need to replace the complete assembly A01986801. The manufacturer has discontinued the center wash arm assembly and replaced it with a complete upper rack assembly A01986801/ 154468502. The center spray arm snaps and locks in place on the bottom of the new rack, as indicated in the video attached to the part number. Read More... Answered by AppliancePartsPros.com | Wednesday, December 9, 2015