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#1
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Crank-arm Dustcap Problem
Went to pull the old crankset (Sugino or SR-made square taper "retro")
and the dustcap was stuck. Soaked it with WD40, as I have done before, came back a few minutes later, and tore it apart when I twisted the screwdriver. I think the good ol' WD40 softened the plastic instead of loosening the threads... Any expert suggestions on getting the rest of the plastic out of the threads so I can use the puller? Thanks. |
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#2
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Crank-arm Dustcap Problem
David wrote: Went to pull the old crankset (Sugino or SR-made square taper "retro") and the dustcap was stuck. Soaked it with WD40, as I have done before, came back a few minutes later, and tore it apart when I twisted the screwdriver. I think the good ol' WD40 softened the plastic instead of loosening the threads... Any expert suggestions on getting the rest of the plastic out of the threads so I can use the puller? Thanks. Those plastic dust caps were always stripping their threads and leaving debris in the crankarm. I'd scrape the threads out with something sharp and pointy. You really only have to get the first couple threads clean- once the remover is started, it'll clean out the rest of the threads just fine. That's assuming, of course, that the threads in the crankarm were in good shape in the first place. Jeff |
#3
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Crank-arm Dustcap Problem
David wrote: Went to pull the old crankset (Sugino or SR-made square taper "retro") and the dustcap was stuck. Soaked it with WD40, as I have done before, came back a few minutes later, and tore it apart when I twisted the screwdriver. I think the good ol' WD40 softened the plastic instead of loosening the threads... Any expert suggestions on getting the rest of the plastic out of the threads so I can use the puller? Thanks. Dig it out with a dental tool or a thin screw driver and then remember to not use these things again. On a properly installed crank, no need to have the 'dust caps' to hold the crank on if the bolt loosens. |
#4
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Crank-arm Dustcap Problem
David wrote:
Went to pull the old crankset (Sugino or SR-made square taper "retro") and the dustcap was stuck. Soaked it with WD40, as I have done before, came back a few minutes later, and tore it apart when I twisted the screwdriver. I think the good ol' WD40 softened the plastic instead of loosening the threads... Any expert suggestions on getting the rest of the plastic out of the threads so I can use the puller? We use a pointy spoke. We also have a crank puller with slots cut in it (disc grinder) to clear oxidized/dirty threads but for plastic dust cap detritus, a pointy spoke is all you need. Handy tool for clearing glass/debris from tire cuts, too. -- Andrew Muzi www.yellowjersey.org Open every day since 1 April, 1971 |
#5
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Crank-arm Dustcap Problem
swab with linseed oil
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