Old 12-27-12 | 11:42 AM
  #42  
San Rensho
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Joined: Oct 2005
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Originally Posted by pierce
re hard to remove cups.... the auto repair folks use this wonderful stuff called Kroil. There is an aerosol version, Aero-Kroil. You should be able to find it at a /good/ auto parts store, but probably not a bigbox chain. its an awesome penetrating oil, makes Liquid Wrench look like a joke. anyways, a little dribble of this stuff on whatever side of a fastener you can access, and let it sit for an hour, and you'd be amazed at what you formerly thought was permanently stuck comes off cleanly. Plan B is, use a hot air gun on the BB shell, and freeze-mist on the inside piece thats not coming out, and while there's still a good temperature differential (hot outer piece, cold inner one), try again with the wrench.


re: cranks, yes, almost certainly Suginos. they were track style, with the 144mm bolt circle, so a 42mm ring was about as small as you could go. I ended up putting an older Ultegra in its place, with 53-39 rings, on my son's vintage Trek roadie.

Acetone and ATF mix, half and half, is also a very good penetrating fluid, supposedly better than Kroil.
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1990s Raleigh M20 MTB--2007 Windsor Hour (track)
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