Removing a Campagnolo centaur Triple Chainset circa 2003

kingtubby
kingtubby Posts: 45
edited June 2018 in Workshop
Hi All

I have a steel bike from 2003/4ish and the gears have completely given up and I want to rebuild the bike.

Before I start trying to remove the chainset (10 speed triple), I was trying to find if there was a nice guide or someone knows what I would need to do. It has two 8mm bolts, one on each crank.

Many thanks

KT

Comments

  • keef66
    keef66 Posts: 13,123
    I'm guessing it's a square taper cartridge type BB. What happens if you remove the crank bolts? Do they come straight out, or do they have a retaining cap / collar.

    If the former, you then need a crank puller to pull the crank arms off the spindle. If the latter, they are self-extracting and undoing the bolt, it will initially loosen, then become harder to turn as it bears on the underside of the cap. Persist and it should pull the crank off.

    https://www.parktool.com/blog/repair-he ... -section-1
  • Vino'sGhost
    Vino'sGhost Posts: 4,129
    keef66 wrote:
    I'm guessing it's a square taper cartridge type BB. What happens if you remove the crank bolts? Do they come straight out, or do they have a retaining cap / collar.

    If the former, you then need a crank puller to pull the crank arms off the spindle. If the latter, they are self-extracting and undoing the bolt, it will initially loosen, then become harder to turn as it bears on the underside of the cap. Persist and it should pull the crank off.

    https://www.parktool.com/blog/repair-he ... -section-1

    they need an extractor.
  • keef66
    keef66 Posts: 13,123
    Vino'sGhost wrote:
    keef66 wrote:
    I'm guessing it's a square taper cartridge type BB. What happens if you remove the crank bolts? Do they come straight out, or do they have a retaining cap / collar.

    If the former, you then need a crank puller to pull the crank arms off the spindle. If the latter, they are self-extracting and undoing the bolt, it will initially loosen, then become harder to turn as it bears on the underside of the cap. Persist and it should pull the crank off.

    https://www.parktool.com/blog/repair-he ... -section-1

    they need an extractor.

    In which case, learn from my mistake and when you remove the crank bolts, make sure to fish out any washers, and fully unwind the extractor before fully threading it into the crank. If you only screw it in a couple of threads when you tighten the central bolt, or if said bolt is bearing on a washer rather than the end of the axle, it can rip out the alloy threads making the crank impossible to remove

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