Jean for Model Number whirlpool model DU930 I took apart my dishwasher sprayer arm and the screw, there is also a plastic washer. I don't remember which part goes in first.
Answer Hi Jean. Are you talking about the lower spray arm? There is a split washer bearing with a lip on one side that goes on first. Then the lower spray arm with plate. Then there is the washer with the larger flat lip on top of that. Then the top nut. The Middle spray arm tube has the split washer on the top side. Then the middle wash arm. Then the rack clip assembly with a center pin on top. The screw goes into the bottom of all of this once it is clipped onto the rack. Thank you. Read More... Answered by AppliancePartsPros.com | Saturday, August 6, 2011