Easy project. 6-year-old appliance. If one is failing replace all 4. The plastic race that holds the bearings becomes brittle and breaks dropping the bearings into the dishwasher tub. Total project time from assembling tools, protecting the hardwood floor, removal, and installation was less than 2 hours.
1) Turn off power to the appliance.
2) Remove 2 mounting Phillips screws holding dishwasher in the cabinet.
2) use a 1/4” nut driver to remove the 2 screws holding the bottom plate from the front of the appliance.
3) Use a 3/4 open wrench to lower the front 2 leveling feet to allow the appliance to be slightly lifted and rolled out.
4) Before completely rolling the appliance the water input probably needs to be removed. It is located front left and is accessible from the front once the bottom plate is removed. Then fully remove the appliance from cabinet.
5) Pop the sound blanket fasteners out of the frame. They are located 1 each side at. side bottom.
6) Remove the racks from the appliance
7) Remove the rails (2) screws per rail top and bottom. Pay attention to the top/bottom orientation while removing. I use a 5/16” nut driver.
8) Install new rails.
9) Reverse above steps.