Terry S York , PA May 30, 2015 Appliance: Maytag Gas Dryer DG312 Maytag Dryer Dg312: One drum wheel shot belt very worn blower wheel stripped @ shaft mounting. How to replace Drum Support Roller. Replaced two drum wheels, the belt and blower wheel. Also, since the dryer is over 20 years old I replaced both drum gaskets (felt) and gave the dryer and vent duct a thorough cleaning. Idler pulley appeared to be in good condition. Do-It-Yourself Rating: Repair Time Estimate: 2+ hours