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Old 05-29-09, 08:59 AM   #1
smurf hunter
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hollowtech II left arm "click" keeps returning

I recently installed a new Shimano 105 FC-5603 (triple crank). After about 300 miles I started hearing a faint "click" when my left crank arm was at 12 and 6 o'clock. Having troubleshooted square taper cranks for a few years, I figured something was loose on the spindle/crank arm connection.

The fore and aft 5mm pinch bolts were slightly loose. So I was more careful to make small, even incremental turns this time. That got me another 120 miles, and I'm starting to hear the "click" again. When I got to work today, I tested with my mutli-tool 5mm wrench, and the pinch bolts did not seem loose at all.

I was extremely careful to grease and really tighten the BB cups, so I'm confident my issue is specific to the crank arms. I've also followed online docs:

Anything else I'm missing? should I use loctite or use more/less grease in certain areas?
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Old 05-29-09, 10:08 AM   #2
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Did you check the pedal threads for looseness? Possibly they need grease too.
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Old 05-29-09, 10:19 AM   #3
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My Tiagra crank did the same, seems i'd tightened the plastic bearing preload cap just a little too much as it went away when i reinstalled and made sure to tighten very gently.
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Old 05-29-09, 10:24 AM   #4
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You many find the following links helpful in tracking it down:

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