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Nope. Don’t have to ever touch it.
There was no mention of it in Shimano docs, so called up shimano tech after seeing same thing happen a couple of times. Guy said it was an assembly grub screw to stop the sleeve from rotating further when you tighten the flanged bolt.
Whether that’s true, I have no idea. At this point, you might as well disassemble to see what it really does and educate us all.
@atz 0.5/0.7nm. Who’s gonna buy a torque wrench just for that??
Chak
Howard
russmeyer
Now that you mention it, could that little grub screw be the culprit? Wtf is it? The crack is right where it sits. Should I have backed this off before tightening, is it to prevent the bolt coming loose or something?