i never learn
Join Date: Aug 2009
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BMX Quando rear hub overhaul?
I ran into a problem disassembling a hub from a low-end Haro bike. I normally work on road bikes and don't have experience with BMX designs, but hey how different could it be? Turns out quite a bit.
I removed the single sprocket (cassette? driver? not sure what to call it) from the hub drive side okay. The sprocket has cups on both sides to hold ball bearings. It fits onto the axle via a fixed axle cone on the inner side and adjustable cone on the outer side. There are 4 pawls held by a single spring in the hub, and these ratchet over teeth on the sprocket. Pretty neat idea.
On the drive side, the axle is held in the hub via what appears to be a press-fitted sealed bearing. On the non-drive side, the axle is secured to the hub via a hub cup and ball bearings/adjustable cone that came apart fine as well.
The axle rotation on the press-fit bearing feels really rough and the axle has a lot of play. I think the bearing is damaged or dirty, but I can't pull the axle out though to access it. Do I need a special tool to service/replace it?
Thanks to anyone who can help.
Last edited by buzz111; 07-12-11 at 11:57 AM.
Reason: Added a couple of pictures