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Old 04-13-19, 01:57 PM
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On the 1 or 2 that have done this for me, I apply "diminishing returns" if the bolt is not tight but the crank arm seems to be I just snug the bolt down, not fully retorque and monitor to see. If the crank arm stays tight then you could locktite the bolt and call it good while still keeping an eye on it.

Also fully agree with Mark on the dust caps, one of their many functions are as a failsafe locknut, they also protect the threads so the puller installs properly to remove the cranks.
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