OTK front hub bearings can tend to fret a little in the hub and being soft magnesium it can wear a little causing the outer race of the bearing to be a little slack in the hub. hence this is more the fault of the hub rather than the bearing. if you put a new bearing in this problem is unlikely to be better. You could try a little locking compound - nut lock NOT stud lock to 'glue the bearing in. If nut lock doesn't work, clean it our and use stud lock, but you might find it difficult to get the bearing out again when you need to replace it, but maybe a little heat will help. Be careful heating up the hub with a strong blow torch or similar - you could end up with a very bright magnesium fire!! If the misses is out put the oven onto about 150C and bake for 10 mins! another solution for slack bearings in hubs is to 'peen' the mag hub. Using a centre pop punch apply a centre pop mark 2 or 3mm way from the bearing - in the mag material, usually in about 4 places around the bearing, the idea is to expand the mag material to grip the bearing. It does tend to work but you end up with centre pop marks on the back of the hub. Either that or bin the hub and get another one, used may be a false economy as you may end up with what you already have.
On rear bearing people don't tend to take out the dust seals as they are not designed to be removable and more importantly refittable (if that is a real word!!). There have been a lot of posts about this the summary was to leave the seals in. Possibly drill a small hole on one side seal to the top and one to the bottom to allow flushing out for cleaning and also to lube. The hole size just big enough to take the lube can pipe. Also just spray grease to lube and not WD40.
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Bearings by 'Matt97' (22 Apr 2015 @ 17:00)
