PU AA-04PU AA 04 is an OEM coil compression spring manufactured by Pallet Mule for the AA5000 and AA5500 manual pallet jack hydraulic units. It serves as the return or biasing spring within the hydraulic pump mechanism, constructed from high tensile spring steel for internal application. Part numbers AA 04, PUAA 04, and PTAA 04 are direct cross references. Compatible exclusively with Pallet Mule manual pallet jacks in the AA5000 AA5500 series. Compatibility:
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