Removing the lower spray arm:
Remove lower rack out of the way.
Remove center wash arm cap by holding spray arm and twisting the cap off.
Once the cap has been removed this should reveal a hex nut remove the nut.
the spray arm should now lift right off.
Cap is circled in red arrow points to hex nut below>
My suggestions for this model once the arm is removed take the screws out of key item 4, and clean the screen key item 6, and the slots on the arms of key item 7 these commonly get pluged with soap build up, dont get them perfect just get them opened up some and reassemble washer and let it fill, once full put a half cup of CLR in the bottom and let it soak for about an hour then close the door and allow the finish of the cycle.
If you need more info let Me know
Hello again Cindy,
In the center of the lower arm is a black plastic soft rubber boot Your saying this got put on under the arm?
Not sure how they would have done that but you would then see the nut in the center
If You have a camera and can snap a picture and post it here for Me I might be able to tell what has happened
Ok sorry the breakdown looked like the boot style, but that funnel in the center is threaded, it will twist and come off.
Something is not right here are yYou able to take a picture and post it so I can see which design this is I think the breakdown that comes up for the model You gave me is showing the wrong dishwasher.
By the way dont break anything to get it apart If you cant take a pic and post it I will figure out wich dishwasher You have.
I found a better picture of the cap that twists off of that spray arm here it is>
You can see by the picture it is threaded for removal and the serated edge for grip take this off and the piece called the nozzle will come out after this is removed.
Once again You dont want to force anything that will just cause more damage.
Let me know once this is apart.
Glad We got got it figured out.
Anytime glad I could help.