I'm working on an XT M737 front hub. When I took it apart it was completely dry and the balls, cups and cones were covered in a hard, black substance which I assume is some sort of compacted grease / dirt residue. It came off the cones quite easily with WD40 and a brass brush - underneath they were heavily pitted, but they can be replaced so I'm not too bothered. I've had a much harder time trying to get it off the cups, as the attached image shows. I'm wondering if anyone has encountered this before, and is there any known way of getting the stuff off?
Neglected XT hub with black residue inside
- Thread starter gmtfd
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