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threadlock in the wrong places

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threadlock in the wrong places

Old 03-19-11, 07:00 AM
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threadlock in the wrong places

My Shimano dual pivot kept coming out of balance (left & right) because the adjustment screw kept backing out after a few rides. So I took it upon myself to drop a drop of permatex blue into the screw of each brake ( F & R). Now I went to adjust and the screwdriver kept kind of slipping, so I assume if I keep this up I will wallow out the screwhead and be stuck.

Do I just find a better fitting screwdriver ( I hear there are Japanes Industry Standards and they are different than our SAE, or is there away to clean the threadlock out, like with brake cleaner or something?

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Old 03-19-11, 07:08 AM
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forget the centering screw. to center the brake just grab the whole thing and move it
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Old 03-19-11, 07:19 AM
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For using thread lock, in an instance where you will want to adjust the screw / bolt again, would use a semi permanant like 243 rather than permanant like 271, for adjusting Shimano screws, they normally have a slot to put a straight blade screwdriver head in, rather than their shallow phillips type head.

Agree with Reptilezs, have used Dual pivots for the last few years, and have never used the centering adjustor, once centered by using the frame / fork bolt, they stay put, untill I need to adjust the hold assembly due to pad wear.
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Old 03-20-11, 12:27 AM
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Originally Posted by reptilezs View Post
forget the centering screw. to center the brake just grab the whole thing and move it
This is what I do. I have seven wheelsets between two bicycles, and centering the brakes is much easier by grabbing the calipers and moving them. It may not be perfect, but it is usually good enough.
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Old 03-20-11, 10:07 AM
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You may also be able to find an allen socket head screw to replace the Phillips head type.
worn cheap phillips screwdrivers are a problem too .. enter> Snap On tools ..
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Old 03-20-11, 10:23 AM
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First, you'll get a better purchase on the screw by grinding the sharp point off your Philips screwdriver so it fits deeper and engages on the sides of the four blades.

Go on-line to the Locktite or Permatex sites for specs. on releasing the various threadlockers. Most breakdown with heat. I use an old french fryer filled with cooking oil for jobs like this, bring the oils temp to just above the breakdown temp, tie a string to the brake ( or use the basket if you have one) and immerse it for a few minutes, lift and drain and allow it to cool.

In the future, you can save money and headaches by not using a thread locker on adjustment screws. If they don't stay put on they're own you can use a bit of rubber cement on the threads as a anti-vibration treatment. This will keep it in place yet allow easy adjustment when needed.
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