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Customer Questions and Answers for Spray Arm by Whirlpool

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Manufacturer Part
4.89 (64)
By: Whirlpool
Part Number: OEM18066786
Manufacturer Part Number: WPW10491331

The Arm-Spray is an OEM part for Whirlpool dishwashers. This component is responsible for distributing water throughout the dishwasher during the cleaning cycles. It rotates and sprays water to ensure that all dishes are thoroughly cleaned, reaching all corners of the dishwasher.

Causes of a bad arm-spray can include clogging from food particles or mineral deposits, damage from heavy items or utensils blocking its path, or wear and tear from regular use.

Symptoms of a bad arm-spray include:

  • Poor cleaning performance with food residue left on dishes
  • The spray arm not rotating properly
  • Unusual noises during the wash cycle
  • Water not reaching the upper racks

This OEM part is also compatible with Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper, and Kenmore models.

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Questions & Answers

For Whirlpool Spray Arm (Part Number: OEM18066786)

1 Answer

Sarah, There is no way to take the spray arm apart and if you are unable to clear the clog then the spray arm would need to be replaced.

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1 Answer

Pat, to remove the spray arm, there is a lock nut directly underneath the spray arm that will need to be rotated counter clockwise in order to remove the spray arm.

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1 Answer

Rick, at the base of the spray arm should be a rotating nut that attaches to the end of the cover that sticks up from the sump assembly. It should rotate counter clockwise to unlock it. If the cover assembly has broken and just has a straight shaft, then you would need to replace the cover assembly [W10500299].

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1 Answer

Tina, When you put the arm on the outlet cover it will then screw onto the cover.

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