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Shimano pedal overtightening

I needed to replace some of the ballbearings in my shimano pedal which was easy enough and I adjusted the cone/locknut correctly. After riding I noticed the pedal was stiff so I reopened to find the cone/locknut had both screwed in tighter. Can anyone give me some advice please?

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8 comments

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ktache | 3 years ago
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I don't know if this might help.

https://www.parktool.com/blog/repair-help/spd-pedal-overhaul

I had problems getting enough torque on the locknut on one of my shimano cage pedals many years ago (DX I believe) and I had to buy the odd little tool.

I got some XT cage pedals for the good bike, and they had the removable axle/spindle and that made things much easier.

Whenever my cup and cones have tightened themselves it's generally because I have not managed to put enough ooompf into tightening the cone and locknut against each other.  Good Luck.

Of course I have stripped threads on wheel spindles giving it too much. Grrr.

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bechdan replied to ktache | 3 years ago
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sounds feasible thanks

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No Sweat | 3 years ago
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The simplest explanation is likely to be that you did not tighten the locknut enough to actually lock it against the cone and the axle.
I'd try again - and be quite firm.

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bechdan replied to No Sweat | 3 years ago
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sounds feasible thanks

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Chris Hayes | 3 years ago
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I did mine recently to remove some play. You'll need a 10mm and 7mm spanner to adjust the bearing correctly (if they're 105s or Ultegra - I assume the rest are the same)... I used a ring spanner for the 10mm nut which adjusts the tension / play, and an open spanner for the 7mm which is the lock-nut.  Assuming you cleaned everything out and replaced the grease.  Otherwise, it's a bit trial and error as the tolerances are quite small, but loosen the 7mm lock-nut, loosen the 10mm a fraction - tighten the lock nut - and then re-assemble. Had to do mine two or three times...it's very fiddly!  I did it without a vice - which probably explains the trial and error.  It would be easier with a vice...

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bechdan replied to Chris Hayes | 3 years ago
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Thanks for the reply, unfortunately it doesn't answer my question

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Chris Hayes replied to bechdan | 3 years ago
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I could be more explicit and say that you probably didn't tighten the lock-nut...:-)

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bechdan replied to Chris Hayes | 3 years ago
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ill retighten it and use some threadlock, just to be sure

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