The Upper Rinse Arm Spinner is an OEM part for Whirlpool dishwashers. As a rotating spray component, it assists water dispersion across the upper basket during rinse cycles.   Heavy accumulations of food or mineral deposits left over after many cycles can potentially clog or restrict rotation over time. Natural wear from cycle after cycle also affects plastic and rubber parts. Symptoms of a faulty upper rinse arm spinner include: Improper or uneven coverage of water on dishes in the top rack   Stubborn food or residue remaining in hard-to-reach areas Less effective drying results on upper dishware Abnormal squeaking, and rubbing noises from the spray arm area This OEM Whirlpool part can also be used on Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper, and Kenmore/Sears brand appliances.Part Number 8193768 (AP3177952) replaces 8193505, 8268296, 8519736, 961493, AH734590, EA734590, PS734590.