Bicycle Mechanics - Left crank grommet pops out of hole
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09-14-10, 04:05 PM
Is this grommet solely a dust seal? It should fit in the ring slot around the crank arm and within the bottom bracket.
I tried pushing it back into place, but it just pops/slides loose again--without the cranks spinning. If they spin, it comes right out.
How urgently do I need to pull the crank arm to address this? Rather, what is causing it?
09-14-10, 04:14 PM
It should fit in the ring slot around the crank arm and within the bottom bracket.
I'm having trouble understanding where this is. Can you post a pic or find a similar one online?
09-14-10, 04:18 PM
Are you talking about something like this: http://www.sickbikeparts.com/catalog/images/Dust-Cap.jpg
or this: http://t0.gstatic.com/images?q=tbn:Z-Ps5AiMNE-2xM:http://www.tokyofixedgear.com/img/pds2/medium/DSC_0205.jpg&t=1
or this: http://harriscyclery.net/merchant/370/images/large/CK029.jpg ?
09-15-10, 09:03 AM
Neither of those first two, from what I can tell. It's these exactly:
09-15-10, 09:29 AM
Pull crank arm, unscrew lock ring , remove cup there will be a groove in the cup for the dust shield to go into. (maybe)
see if you can fit that ring back in there again.
that far in , you might as well do the rest.. overhaul the BB .. clean fresh grease and new balls...
[ no need to remove other cup just clean , grease and drop bearings into grease.]
09-15-10, 12:53 PM
That's seal-ring for the bottom-bracket. May have been installed backwards.
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