What causes an idler pulley to fail?

Idler pulleys typically fail due to wear on their internal bearings from constant friction and heat over time. This wear can lead to increased noise, resistance, or the pulley seizing. Lint accumulation around the pulley can also contribute to premature wear and failure.

Can I run my dryer with a bad idler pulley?

It is not recommended to operate a dryer with a failing idler pulley. A bad pulley can prevent the drum from spinning, cause further damage to the drive belt or motor, and potentially create a fire hazard due to overheating or excessive friction.

How do I know if my idler pulley needs replacing?

Common indicators include loud squealing, grinding, or thumping noises during operation, especially when the drum is turning. If the dryer drum struggles to spin, spins intermittently, or does not spin at all while the motor is running, the idler pulley may be faulty.

Dryer Idler Pulley Replacement Guide | Appliance Aid

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🏆 RECOMMENDED PART

[Upgraded Dual Ball Bearings] BlueStars DC93-00634A Dryer Idler Pulley

MODEL NUMBER: [UPGRADED Dual Ball Bearings] DC93-00634A Dryer Idler Pulley Assembly (6’’Length X 4’’Width). Please check the model number carefully before ordering. If you're unsure about the compatibility, send us yo...
UPGRADED DESIGN: This idler pulley is upgraded with the double ball bearings technology that provides a long-lasting belt tension and less motor wear. It is made of durable high quality materials and well-tested by th...
EASY TO INSTALL: Compatible with most top name brands (Samsung, Amana, Maytag, Kenmore). Replaces part numbers: PS11771601, AP6038887, 12002777, 35001083, 35001098, 35001276, DC61-01215A, DC61-01230B, DC96-00882B, DC9...
FITS MODELS: DV209AGW, DV210AEW/XAA, DV231AEW/XAA, DV330AEW/XAA, DV40J3000EW/A2, DV42H5000GW/A3, DV42H5200EF/A3, DV42H5200EP/A3, DV42H5200EP/AC, DV42H5200EW, DV42H5200EW/A3, DV42H5200GW/A3, DV45H6300EG/A3, DV45H6300GG...
SOLVE THE PROBLEMS: The assembly includes the pulley wheel and bracket. It is found near the motor where it provides tension to the dryer belt, allowing it to rotate the drum during the drying cycle. Over time, the pu...

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What the 838637 does

The idler pulley maintains constant tension on the dryer's drive belt, allowing the motor to effectively spin the dryer drum. It acts as a guide for the belt's path.

Symptoms when this part fails

Squealing, grinding, or thumping noises from the dryer
Dryer drum not spinning or spinning slowly
Burning smell from the dryer
Excessive vibration during operation

Compatibility

Fits the Samsung family. Specifically:

Any unit originally equipped with OEM part number(s): PS11771601, AP6038887, 12002777, 35001083, 35001098, 35001276, DC61-01215A, DC61-01230B.
Check the model/rating plate inside your appliance and compare it against the fitment table on the product listing before ordering — this guide does not list specific compatible models because Amazon does not provide verified fitment data through this pipeline.

Also replaces: PS11771601, AP6038887, 12002777, 35001083, 35001098, 35001276, DC61-01215A, DC61-01230B

Tools you'll need

Phillips head screwdriver
Flathead screwdriver
Nut driver set
Pliers

Difficulty: Moderate · Time: 30-60 minutes

How to install the 838637, step by step

Disconnect the dryer from its power source.
Remove the dryer's top and front access panels.
Locate the idler pulley and the drive belt around the drum.
Release tension on the drive belt and carefully remove it from the pulley.
Unbolt or unclip the old idler pulley from its mounting bracket.
Install the new idler pulley, ensuring it is securely fastened.
Route the drive belt correctly around the drum, motor pulley, and the new idler pulley.
Reassemble the dryer panels and restore power to test operation.

Related troubleshooting

If swapping this part doesn't fix the issue, check these next:

Dryer not heating up but runs? 6 fixes for Whirlpool, Samsung, LG, GE and more