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Customer Questions and Answers for Main Bearing Assembly (Washer) by Whirlpool

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Manufacturer Part
4.89 (64)
By: Whirlpool
Part Number: OEM18027306
Manufacturer Part Number: WP40004201P

This replacement main bearing assembly supports the washer's drive/spin system. It keeps the inner basket and drive shaft rotating smoothly and quietly, helping maintain alignment and reducing vibration during wash and high-speed spin.

  • Supports and centers the spin basket/drive shaft for low-friction rotation
  • Helps reduce noise and vibration when spinning at high RPMs
  • Restores smooth operation when the original bearing is worn or rough
  • Common symptoms: roaring/grinding during spin, basket wobble/play, roughness turning by hand, possible leak at rear center if related seal wear is present
What's included: 1 main bearing assembly Install notes:
  • Disconnect power and water before service; allow the appliance to cool
  • Access and replacement procedures vary by model; significant disassembly is typical
  • A bearing press/driver may be required; inspect shaft and related seals and replace if worn
  • After reassembly, run a test spin to check for leaks

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$58.95
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Questions & Answers

For Whirlpool Main Bearing Assembly (Washer) (Part Number: OEM18027306)

1 Answer

Jimmy John, The leak is from the tub bearing / seal assembly R9900457 not the bearing. But the leaking water has probably flushed the lubricant out of the bearing and it will also need to be replaced, it will get noisy after a few loads of laundry.

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1 Answer

Hello Carlos, The bearing, outer tub seal and tub are sold as an assembly W10772618 for a reason. You see, if the bearing isn't installed exactly straight, the spinner support shaft rides at an angle which destroys the tub seal in just a few loads. When the seal is destroyed, the detergent water leak from the wash tub goes directly into the spin bearing. This washes the lubrication out of the bearing, causing it to fail pre-maturely. The manufacturer uses a special "jig" at the factory to properly install the bearing and seal assemblies into the outer tub to prevent this from occurring. When the design first came out, the bearing and seal were available individually. Trained technicians in the field had such a high failure rate that the tub assembly with the seal and bearings pre-installed was made the only way to get the parts. I don't know of any way to get the bearing only for this reason since the individual parts have been eliminated from availability by the manufacturer.

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1 Answer

Hello Ediie. This pump is attached to motor and does not pump out first. Look for clogs and if none is found replace the pump 27001233 on the unit.

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1 Answer

Hello John, The instruction sheet reads as follows: 1. Remove Toe Panel with a 5/16” nut driver. Loosen bottom screws far enough to tip bottom of panel out and away from washer. Remove 2 screws holding Front Panel to Cabinet. Tip Front Panel bottom away from Cabinet and remove. Remove two screws holding Top assembly to Cabinet. Carefully Lift Top Assembly, and prop in an open position. 2. Remove fabric softener dispenser by unsnapping from agitator. Remove agitator by one of two ways. 1. (Auger style agitators) Loosen bolt in agitator and remove by sliding straight up output shaft of transmission. 2.(Flex vane agitators) Remove flex vane agitator by placing hands under agitator lip and pull upward. If agitator is difficult to remove, use two agitator removal hooks, No. 254P4P under bottom edge of agitator. Remove drive bell by pulling upward. If drive bell is difficult to remove, use agitator hooks. 3. Remove six tub springs from lower lip of outer tub using spring hook tool 289P4. Remove counter balance spring located in the rear of the washer. 4. Unsnap and remove Outer Tub Cover. 5. Remove O-Ring from transmission output shaft. During reassembly, be sure to install new O-Ring (25-7941) provided with kit. 6. Use spanner wrench (35-2968) and seal tool (22002898) to remove seal nut. 7. Remove inner tub bolts and inner tub. 8. Remove lint filter. 9. Remove washtub hub with Maytag spanner tool 22038313. Turn spanner counterclockwise to remove. It may be necessary to lock transmission from turning. Attach clamp or Visegrip® tool to transmission only as shown. Transmission will stop rotating when clamp contacts tub support. 10. Disconnect tub drain hose from outer tub. 11. Remove bolts from motor assembly and drop motor down to base. Disconnect wire harness from motor tap. 12. Remove drive belt from transmission pulley. 13. Remove pressure hose from pressure bulb on outer tub. 14. Lift outer tub and transmission assembly out of washer cabinet. Turn outer tub and transmission assembly upside-down on protective padding. 15. Remove screws holding leg support to outer tub. Separate transmission assembly from outer tub. 16. Remove seal and bearing using the brake removal tool 12002012 with included 3” PVC end cap. 17. Coat new triple lip seal with petroleum jelly. 18. Apply center seal grease (056016) to Seal Nut before installing. 19. Use 3M800 on the outside diameter of the Tub Bearing as shown. 20. Install new bearing using Brake/Bearing tool 12002012, large washers and PVC end cap. Important: Use large washers to prevent damage to bearing. 21. Confirm the lower bearing which is located in the Milk Stool has not been damaged from a water leak (Bearing #40004001). 22. Reassemble washer. FOR AN ILLUSTRATED COPY PLEASE PROVIDE AN E-MAIL ADDRESS.

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1 Answer

Chipper, There's a lot involved in repalcing the main tub bearing. We're sending you as much information as possible, and you'll have a better idea of what's involved. Thanks

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