Need to replace the motor, sounds like bearings are going bad in it.
What make and model of machine are you working on?
If you let us know what model of Hoshizaki you're working on, I will be happy to assist you in finding the OEM replacement.
Bison is an OCM that manufactures components for the manufacturers we serve. I did attempt to cross reference the Bison part number, but Bison has no information on the part number, likely due to its age.
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