How to Replace W10837240 Dryer Idler Pulley on Whirlpool & Maytag Dryers — Step-by-Step

Your Whirlpool WED5800BW0 dryer is making a rhythmic squealing sound that gets worse when the load is heavy. The drum still turns, but that noise makes you wonder if something's about to break. Nine times out of ten, that's your idler pulley wearing out — the spring-loaded tension wheel that keeps your dryer belt tight and properly aligned.

The W10837240 idler pulley assembly includes both the pulley wheel and mounting bracket, which simplifies this repair significantly. This part fits dozens of Whirlpool, Maytag, KitchenAid, and Kenmore dryers, replacing older part numbers like W10547290, W10118756, and 3388674. I'll walk you through the complete replacement process.

What You Need Before Starting

This is a straightforward repair that doesn't require specialized tools:

• Phillips or Torx screwdriver (depends on your model)
• Putty knife or flat blade screwdriver
• Work gloves (optional but helpful)
• New dryer belt (recommended — read why below)

Time Required: 30-45 minutes

Difficulty: Moderate — accessing the pulley requires removing the front panel

Safety First

Unplug your dryer completely before starting this repair. If you have a gas dryer, you don't need to disconnect the gas line for this repair, but make sure the dryer is pulled away from the wall enough to work comfortably. Wear work gloves when handling the belt — dryer lint accumulation can contain sharp debris.

Step 1: Access the Dryer Cabinet

Open your dryer door and locate the two screws inside the door opening that secure the top of the front panel. Remove these screws. Next, insert a putty knife between the top panel and front panel about 2-3 inches from each corner to release the spring clips. Lift the top panel up and lean it back against the wall. Now remove the screws holding the front panel (usually located at the top corners once the top is up). Disconnect the door switch wire harness, then lift the front panel off and set it aside.

Step 2: Release Belt Tension

You'll now see the drum, belt, idler pulley assembly, and motor. The idler pulley is the spring-loaded wheel on the right side near the motor. Push the idler pulley toward the motor to release tension on the belt. With the tension released, slip the belt off the motor pulley, then off the idler pulley. You can now let the belt rest on the drum.

Step 3: Remove the Old Idler Pulley Assembly

The W10837240 assembly mounts to the dryer base with a single bolt or screw through the bracket. Remove this fastener and the entire idler pulley assembly will come free. Inspect the area for lint buildup — this is the perfect time to vacuum out any accumulated debris around the motor and blower housing.

Step 4: Install the New Pulley and Re-thread the Belt

Position your new W10837240 idler pulley assembly in the mounting location and secure it with the bolt. Here's where that pro tip matters: if your dryer belt looks worn, cracked, or glazed, replace it now while everything's apart. You're already 90% through the labor — swapping the belt takes an extra two minutes. Loop the new or existing belt around the idler pulley first, then around the motor pulley. Pull the idler toward the motor to create enough slack to position the belt properly. Release the idler and verify the belt sits centered on all pulleys.

Step 5: Reassemble and Test

Rotate the drum by hand several complete revolutions. The belt should track smoothly without rubbing or slipping off. If everything looks good, reconnect the door switch wire, position the front panel back onto the cabinet, and secure all screws in reverse order. Replace the top panel and secure it with the interior screws.

Testing After Installation

Plug your dryer back in and run a short cycle with a few towels. Listen carefully during the first few minutes — you should hear smooth, quiet operation. The squealing or thumping noise that brought you here should be completely gone. Check that the drum rotates freely in both directions (some dryers reverse periodically to prevent tangling).

Frequently Asked Questions

Will this pulley fit my Kenmore dryer that starts with 110?

Most Kenmore 110-series dryers were manufactured by Whirlpool, and the W10837240 fits many of these models. Check your dryer's complete model number against the compatibility list or measure your existing pulley — it should be approximately 2 inches in diameter with a spring-loaded bracket.

How do I know if my idler pulley is bad versus the motor or drum bearings?

Idler pulley problems create a rhythmic squealing or chirping that changes with drum speed. If you hear grinding or rumbling that continues even when the drum isn't rotating, you're likely dealing with drum bearings or motor issues. A worn idler pulley will also show visible wear — the wheel surface becomes grooved or the pulley wobbles on its shaft.

Should I really replace the belt at the same time?

It's not mandatory, but it's smart. Dryer belts typically last 5-7 years, and a worn idler pulley often indicates your belt has similar mileage. Since you're already inside the dryer with the belt removed, replacing both parts now prevents another repair session in six months when the belt finally gives up. The belt costs around $10-15 and takes no additional disassembly.