Shop this updated piece in the yellow jacket. The original part (same part number) is a plastic/rubber bushing that fits over two shafts. Really bad design but it's nice to see the Yellow Jacket show up and update the design at a very reasonable price. If you have a sleeve type, replace it as soon as possible. How to understand that the type of sleeve did not work? This is the quietest electric motor and the pump runs silently.
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