Play in Hollowtech Bottom Bracket

DrLex
DrLex Posts: 2,142
edited February 2014 in The workshop
Morning,
I noticed that my SM-BB5700 bracket has a bit of play, and it's not due to the pinch bolts on the non-drive side crank being loose.
Do I just need to tighten up the star bolt on that side using something like this cheap install tool or should I get a Park Tool BBT-9 to dismantle the bracket and regrease or replace bearings/cups/whatever?
(I appreciate that the third way is to leave it with the LBS, but I'd like to learn!)
TIA!
Location: ciderspace

Comments

  • slowbike
    slowbike Posts: 8,498
    which way is it moving? side to side?
  • DrLex
    DrLex Posts: 2,142
    Play is transverse to axis of rotation, so could be described as up/down or fore/aft, depending on where the crank is!
    Effectively, it's like the play one can get on a wheel axle.
    Location: ciderspace
  • slowbike
    slowbike Posts: 8,498
    It needs taking apart - that's for sure .... probably needs a new BB ... fortunately they're not too expensive!

    I've not stripped a HT2 bb before - but I don't believe the bearings are supposed to be user serviceable ...
  • DrLex
    DrLex Posts: 2,142
    Thanks - sounds like a weekend job, then. Best order up tool & new bracket.
    Much obliged to you for the posts.
    Location: ciderspace
  • DrLex
    DrLex Posts: 2,142
    Half an hour with new BB, park tool, mallet & a dab of grease and all done. Found that the seal on the drive side bearing had lifted, so replacement was the right action. Possibly knock seconds off tomorrow's commute...
    Location: ciderspace

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