Douglas F Grand Ledge , MI July 24, 2021 Appliance: Whirlpool Laundry Center, Washer/Dryer WET4027EW0 Whirlpool Washer Dryer Combo Wet4027ew0: The dryer was squeaking loudly when running. How to replace Idler Pulley. I replaced the drive belt and the the idler pulley. Both were sized properly and functioned just like the original parts. The repair went smoothly and the dryer now runs quiet again. Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours