Reymundo A Pacoima , CA December 12, 2014 Appliance: Whirlpool Dishwasher DU7200XS0 Whirlpool Dishwasher Du7200xs0: Replace diswasher rollers. How to replace Lower Rack Roller 4-Pack. EASY! No tools needed. However, your training video made it that way. Thanks for your help! Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes