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Front hub rebuild

Old 11-16-15, 09:08 PM
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_ForceD_
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Front hub rebuild

I'm about to clean and replace the cone and bearings on a front hub. Easy enough. But here's my question: What's the best way to get the pressed-in dust cap out of the hub? Usually I just use a small screwdriver to easily pry it out. But that usually ends up disfiguring it if even slightly. I'd like to get it out, and back in, without bending or disfiguring it. Is that possible?

Dan
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Old 11-16-15, 09:17 PM
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I use a wide bladed screwdriver and pry through the inner opening a bit at a time. Any distortion is minor and easily corrected with a soft face hammer or even finger pressure. You can avoid the problem entirely by leaving the dust cap in place and cleaning the inner race through the cap's opening with a Q-tip or small piece of cloth on a stick to remove the grease and dirt.
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Old 11-16-15, 09:44 PM
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HillRider -- Concur with your suggestions. But, the cones are just a bit pitted. I would like to get a good inspection of the cups just in case. I guess I'll just do it the usual way as you suggest.

Dan
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Old 11-17-15, 06:47 AM
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I used to use a tire lever with a curved tip, but first laid a combo wrench over the hub flange (or the spokes near it for a smaller flange hub) as a fulcrum, so that the end of the lever pulled up only on the outside radius of the dust cap. That prevents pushing down on the outside of the dust cap, which is the most common problem. I would then lever slightly at each point while working my way around the rim of the dust cap.
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Old 11-17-15, 06:52 AM
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cny -- Good suggestion. Thanks.

Dan
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Old 11-19-15, 06:08 PM
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I just leave them in place whenever possible.

I think I read about someone using a "Blind Hole Puller" to get them out. I haven't used one myself, but it sounded like a good idea.
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Old 11-19-15, 06:37 PM
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I've used the cone wrench laid across the edge , and pried against It, so as to not dent the dust cover ,

But Yes .. Best to 'Let sleeping Dogs Lie', leave them in place

once you take the axle out you should be able to see the cleaned surface well enough, without removing the dust shield.
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Old 11-19-15, 06:54 PM
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The job is done. But, I got them out without any disfiguration. As suggested I laid something across the hub flange to pry agains. This particular set popped right out. They seem to be a little more substantial than most. I like taking them out so that I can really thoroughly clean the cup well, and get a good inspection of it. Very difficult to completely clean, and inspect in there without removing them.


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Old 11-19-15, 06:59 PM
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Originally Posted by CliffordK View Post
I just leave them in place whenever possible.

I think I read about someone using a "Blind Hole Puller" to get them out. I haven't used one myself, but it sounded like a good idea.
That's a pretty expensive tool; considering the job at hand, and the cost of replacement shields -- if you can get one, that is. That said, I sometimes ponder splurging on one to service my XT freehubs. But in that case, you really cannot do a thorough job without pulling the shield, unlike most hubs I have come across.
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