Victor C Apple Valley , CA December 03, 2015 Appliance: Samsung Dishwasher DW7933LRABB/AA-0001 Samsung Dishwasher Dw7933lrabb/Aa-0001 / : Bottom rack did not stay on track. How to replace Dishwasher Lower Dish Rack Roller. Added extra 2wheels that where missing, now has all 8 wheels 4 on each side. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes