Originally Posted by Triloc
Iīve got a 2008 Specialized Allez double with a 2 piece Shimano Sora cranks that needs tightening.
However I canīt really figure out what type of cranks they are and what tool I need.
I looked at Park Tool and I honestly canīt figure out what type it is.
Isis, Hollowtech, square spindle
Sorry for the newbie question but.
If you have a Sora 2-piece crank, it's got a Hollowtech II
spindle. Does it look like the one shown below? If it does, then congratulations, that's a major improvement over those Sugino square-taper ones
If so, then removal is pretty easy:
1) loosen the pinch bolts on the left arm using a 5mm hex key
2) remove the plastic retaining cap from the left end of the spindle using Park Tool BBT-9
3) look in the gap that the pinch bolts squeeze, and you see a thin plastic thing. Pop the outboard end of it up away from the spindle; this plastic thing is a "safety" that plugs into a hole in the crankarm, so that it doesn't fall off even if the retaining cap falls out.
4) remove the left crankarm from the spindle. Rock it while pulling, and it'll begin to come off. Tapping on the end of the spindle to drive it out of the arm also works.
5) pull the driveside arm out of the bike from the other side.
6) if you want the bottom-bracket cups removed too, the BBT-9 tool will also do that. The driveside cup is lefty-tighty, rightie-loosie on your Specialized, since it's English-thread.
Reinstallation is similar. Grease the spindle lightly with some good-quality grease, including the splines at the end. Don't forget to pop the thin plastic retainer back down (the one mentioned in step 3). Before tightening the left arm's pinch bolts, use the plastic retaining cap to slightly preload the bearings (modest turning force on the BBT-9 with your fingers will be enough). If possible, use a torque wrench to tighten the pinch bolts on the left arm to 12-15 N-m in a progressive 1-2, 1-2, 1-2 pattern.
Last edited by mechBgon; 07-22-08 at 10:44 PM.