How do I remove the end pieces from the upper dishrack rollers in order to install a new upper dishrack?
Should be able to push the tab at the end of the slider track holding the upper rack and push 1 or 2 tabs and turn inside towards the center of the tub and it should release and you can pull the whole upper rack out. Be gentle the plastic can break or get damaged easily.
Click on the below picture for more info, includes a video
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