View single post by Mark Rosenbaum
 Posted: 12-16-2005 02:52 pm
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Mark Rosenbaum



Joined: 03-12-2005
Location: Kingman, Arizona USA
Posts: 532
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 Good question.  I'd suppose that it's present to provide a small sealed volume to capture whatever gets past the o-ring and bearing, so that the brakes are not contaminated.  If that's not the answer, then perhaps it's a carry-over of what Vauxhall did in the old days before o-rings, or perhaps is intended to keep brake dust and other debris away from the bearing.