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Old 12-30-2001, 11:22 AM
Arthur Dalton Arthur Dalton is offline
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Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,777
They are there to hold the shaft from turning when installing the new ones.
Coming off requires a puller/fork tool.

The right side may need cleaning to get the 5mm key inserted.
I never use the hex. If you tap the new ones in, they hold enough to tighten the nuts.
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