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  1. #1
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    SRAM X7 Crank coming loose...

    After downloading the tech manual from the SRAM www I see that there is a lock screw on the left side crank.

    After adjusting to SRAMīs specs and a 30 mile ride the crank has come loose for the third time on a new bike (less than a hundred miles)

    Anyone have same issues? Is this a warranty claim? If not, is it an excessive grease problem on the 10mm bolt?

    Help would be greatly appreciated!

  2. #2
    thecentralscrutinizer
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    Have you installed it using proper torque and Loctite threadlock?
    2014 Giant Anthem 27.5
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    2003 TiSport Gman

  3. #3
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    I haven't taken it apart, the Tech guide does not mention loctite. It has been tightened to 50NM and then adjusted the left side to "hand tight".

    If it is not a warranty issue I will take it apart to see if it was greased by accident during the original build.

    Regards...

  4. #4
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    Following the manual and assuming you're on PF/BB30 cranks:
    Thread the bearing preload adjuster all the way on (the plastic collar on the left side)
    Install he left arm/spindle
    Tap it over lightly with a rubber mallet toward the driveside.
    install the driveside spacer
    install the right side crankarm, adequate grease on threads and spline surfaces.
    Torque right side crankarm bolt with a reliable torque wrench to spec.
    now tap the right side crank lightly with a rubber mallet to get the remaining gap consolidated on the non driveside.
    Adjust the collar to take up the gap, about another 1/8 turn to add proper preload.
    Tighten the collar clamp screw until the split in the collar is closed.

    Should hold up fine.

    Might be worth re-torquing the driveside after a 10 minute ride around the neighborhood.

  5. #5
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    Quote Originally Posted by rammer View Post
    Might be worth re-torquing the driveside after a 10 minute ride around the neighborhood.
    Yep thatīs pretty much it!

    In the last couple of days I have gotten in a really good trail ride, mostly DH but to go down ya gotta go up...

    Main point: After about 110 miles no further problems. Will keep thread updated with any further maintenance required.

    Best regards and Happy Holidays to all.

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