Aaron V South Lyon , MI August 08, 2019 Appliance: Whirlpool Dishwasher WDT920SADM0 Whirlpool Dishwasher Wdt920sadm0: Broken upper tray adjuster arm and cover mechanism. How to replace Housing. Replaced adjuster arm and cover with new parts from appliancepartspros.com. No tools needed! Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes