DA FC-7410 crank bolt torque

dbmnk
dbmnk Posts: 217
edited January 2012 in Workshop
What would be the correct crank bolt torque for Shimano Dura Ace FC-7410 crank?

I have a split crank bolt that I would like to replace, and I got an original replacement bolt.
Assuming the bolt has split due to improper torque, I'd like to do it right this time.

Comments

  • oldraver
    oldraver Posts: 94
    Park tools website http://www.parktool.com/blog/repair-hel ... d-concepts

    Suggests somewhere between 305-391 in-lb or 34.465-44.183 Nm

    Hope that helps.
  • dbmnk
    dbmnk Posts: 217
    thanks - any idea whether square taper generally needs more or less torque than octalink?
    (so I know which end of the scale I should shoot for)
  • oldraver
    oldraver Posts: 94
    No idea whatsoever unfortunately. I would go for about 40Nm personally. ( I am a lightweight however & very unlikely to worry Sir Chris Hoy in a max power output test ) :-)
  • nicklouse
    nicklouse Posts: 50,675
    dbmnk wrote:
    thanks - any idea whether square taper generally needs more or less torque than octalink?
    (so I know which end of the scale I should shoot for)
    See what it says on the link above.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • dbmnk
    dbmnk Posts: 217
    oldraver wrote:
    No idea whatsoever unfortunately. I would go for about 40Nm personally. ( I am a lightweight however & very unlikely to worry Sir Chris Hoy in a max power output test ) :-)
    OK, thank you!
  • dbmnk
    dbmnk Posts: 217
    nicklouse wrote:
    dbmnk wrote:
    thanks - any idea whether square taper generally needs more or less torque than octalink?
    (so I know which end of the scale I should shoot for)
    See what it says on the link above.
    Well that is what I did, am I missing something?
    I know you have a pretty good idea of what the torque should be, so any pointers would be greatly appreciated.

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