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Dry means no lubricant. No lubricant means it escaped from the bearing. The only way for it to escape is through a damaged seal. The question becomes, where is the damage, and how was it incurred? The usual method of answering these questions involves visually inspecting the bad seal. You will have that opportunity when you decide to replace the bearing.
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Help them do what they would have done if they had known what they could do.
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