Customer Questions and Answers for Wash Arm Cap (Spray Arm Retainer) by Whirlpool

This wash arm cap secures the dishwasher spray arm to its hub so it spins freely and distributes water. Replace a worn or missing cap to restore wash performance and keep the spray arm from loosening or coming off.

• Locks the spray arm onto its post/hub for proper alignment
• Allows smooth rotation for even water spray coverage
• Helps prevent wobbling, noise, or the arm detaching during cycles
• Common signs: spray arm falls off, is loose, doesn't spin, or dishes aren't getting clean

• Disconnect power; open the door and remove the rack to access the spray arm
• Unscrew and remove the old cap; lift off the spray arm if needed
• Seat the spray arm and hand-thread the new cap; tighten snugly without over-tightening
• Spin the spray arm by hand to ensure free movement before running a cycle