How to Install Idler Pulley Shaft Washer WPY312527 in a Whirlpool Dryer
Quick answer: Unplug the dryer, open the top and front panel to reach the idler pulley below the drum, release the belt from the idler, pull the pulley off its shaft, slide washer WPY312527 onto the shaft against the bracket, refit the pulley and its retainer, then re-route the belt and spin the drum by hand.
Idler pulley shaft washer WPY312527 is the thin washer that sits on the idler pulley shaft of Whirlpool-built Maytag style dryers such as MDE7657BYQ, LDE5914ACE and MDE5000AYW. The idler assembly is the spring-loaded arm under the drum that keeps the drive belt tight; the pulley spins on a fixed shaft, and this washer keeps the pulley from rubbing against the bracket and takes up the end play so the pulley tracks straight. When it wears through or goes missing, the pulley wanders on its shaft, the belt starts squealing, and the pulley face eventually grooves into the arm.
This washer is also listed for a number of washer-dryer combination models, which is why our fitment data shows some washer model numbers alongside dryers. The installation itself is a laundry repair you can do at home with basic hand tools. The main effort is opening the cabinet and dealing with belt tension; the washer goes on in a moment once the pulley is off. Manufacturer instructions call for unplugging the appliance and wearing work gloves, and this guide follows that.
See part details and every compatible model: WPY312527
- Unplug the dryer. On a gas model also close the gas shutoff valve before moving the cabinet.
- Wear work gloves; the cabinet edges and idler spring can pinch or cut.
- Let the drum cool if the dryer just ran; the heater housing stays hot for a long time.
- Keep fingers out of the belt path when releasing the idler; the spring snaps the arm back hard.
Tools and Parts You Need
- Putty knife for releasing the top panel clips
- Phillips and flat-blade screwdrivers
- 1/4-inch and 5/16-inch nut drivers
- Needle-nose pliers for the shaft retainer
- Work gloves
- Flashlight
- Vacuum for the lint under the drum
Step-by-Step Installation
- Disconnect and pull the dryer out Unplug the dryer and, on gas units, close the gas valve. Slide the dryer forward far enough to open the top and remove the front panel.
- Open the cabinet Release the top panel by pressing the front clips with a putty knife, or remove the screws at the rear on older models, then tilt it back. Remove the screws inside the front panel and set the panel aside, unplugging the door switch if it is wired to the panel.
- Release belt tension Reach under the drum to the idler arm, push it toward the motor to slack the belt, and slip the belt off the idler pulley and motor pulley. Note how the belt loops around the pulley so you can re-route it later.
- Remove the pulley Pull the retaining clip or ring from the end of the idler shaft with needle-nose pliers and slide the pulley off. Catch the old washer if it is still there; it may be flattened or split.
- Clean the shaft Wipe belt dust and lint from the shaft and check it for grooves. A badly grooved shaft means the whole idler assembly should be replaced rather than just the washer.
- Install the new washer Slide WPY312527 onto the shaft so it sits flat against the bracket, then push the pulley on after it. The washer goes between the bracket and the pulley hub, not on the outside.
- Secure and re-route the belt Refit the retaining clip on the shaft end. Loop the belt around the motor pulley and under the idler pulley the same way it came off, then let the idler arm spring back to tension it.
- Check and close up Spin the drum by hand a few turns; it should turn smoothly and the belt should ride centered. Reinstall the front panel, reconnect the door switch, lower the top, plug in and run an air-only cycle.
Fit Checks Before You Call the Job Done
- The washer slides onto the idler shaft without forcing and sits flush against the bracket.
- With the pulley installed, it spins freely but has almost no side-to-side play on the shaft.
- The retaining clip snaps fully into its groove on the shaft end.
- The belt runs centered on the idler pulley when you spin the drum by hand.
- No squeal or ticking during a five-minute air-only test cycle.
Common Mistakes to Avoid
Putting the washer on the outside If the washer ends up between the pulley and the retaining clip, the pulley still rubs the bracket and the clip may not seat. It belongs against the bracket.
Reusing a grooved pulley A pulley whose bore is worn oval will keep squealing no matter how new the washer is. Replace it while you are in there.
Twisting the belt The belt must loop under the idler with the grooved side against the drum. A twisted belt shreds within weeks.
Forgetting the door switch plug If the front panel goes back on without reconnecting the door switch, the dryer will not start and you will have to open it again.
Skipping the lint cleanup Lint packed around the idler and motor is a fire risk and hides the very wear you are trying to fix. Vacuum the base before closing up.
Troubleshooting After Installation
Squeal persists after replacing the washer The pulley bearing itself is worn or the shaft is grooved. Replace the pulley or the full idler assembly.
Belt slips off during the first cycle The belt was routed on the wrong side of the idler pulley or the idler spring is stretched. Recheck the routing and spring.
Drum turns but scrapes A drum support or glide was disturbed while the front panel was off. Check that the drum sits properly on its front supports.
Dryer will not start after reassembly Confirm the door switch is plugged in and the top panel is fully latched so the door closes properly.
Care Tips After the Repair
- Clean the lint screen every load; a clogged screen makes the blower and belt work harder.
- Vacuum inside the base of the dryer once a year to keep lint off the idler and motor.
- Listen for early squeals; the washer and pulley are cheap when replaced before the shaft grooves.
- Do not overload the drum, which raises belt tension and wears the idler faster.
Compatible Models (Sample)
This part is listed for 64 Whirlpool models in our fitment data. Always confirm your exact model number on the appliance's rating plate.
Repair Difficulty and Time
Difficulty: Moderate. Typical time: 30 to 60 minutes.
Frequently Asked Questions
Why does the fitment list include washer model numbers like MLG19PDDWW?
Those are stacked washer-dryer combinations that use the same dryer idler assembly, so WPY312527 fits the dryer half of those units.
Should I replace the pulley at the same time?
If the pulley spins roughly or its bore is worn, yes. The washer alone fixes rubbing against the bracket, not a worn bearing.
Does this washer fit Maytag branded dryers?
Yes. Models such as LDG9900BBL and GDE882 are on the compatibility list.
Can I do this without removing the drum?
Yes. The idler is reachable from the front once the front panel is off, without pulling the drum out of the cabinet.
Final Checklist
- Dryer unplugged and gas valve closed if applicable
- Top and front panel opened, door switch disconnected
- Belt released from idler and motor pulleys
- Old washer removed and shaft cleaned
- WPY312527 seated flat between bracket and pulley
- Retaining clip snapped into shaft groove
- Belt re-routed correctly and drum spins smoothly by hand
- Panels reinstalled and air-only test cycle run