Originally Posted by
Flyingblind9
Since PF30 bearings are directly molded into nylon sleeves that are also pressed directly into the frame, you need to replace the whole thing. You can do this easily at home with the park tool punch and a threaded rod with washers. I used this method to replace my BB30 bearings.
I have the Park tool and that is all I need for the BB with a threaded rod (though I guess acme thread would be best). But the Park tool seems to only work on the cup for removal. This WM BB I have has very nice alloy cups with o-rings where it engages the shell and also the interface between the two sides. So when I install this I would kind of like to make it a "forever" job and only renew the bearings if needed later.
I got started on this because I didn't like the feel of cranks spinning and pulled the seals off the bearings in the OEM SRAM PF30. The drive side bearing didn't look that good. I tried to clean it up and force some grease in there the best I could while in the bike, but it doesn't seem like the most effective means (in the past I have only had old-style square taper BB with balls in carrier that's easy to service).
scott s.
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