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improper crank arm cleaning.

Old 07-06-21, 06:29 PM
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justinschulz9
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improper crank arm cleaning.

is it improper to use an accurate sized die to clean the crank arm hole where your pedals thread into???
ive found it to be the only way to get a ton of dirt out, but dont want to get too comfortable if its damaging
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Old 07-06-21, 06:43 PM
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Keep in mind....

Right-Right, Left-Left.

You'll probably need a special pair of pedal taps, right and left.

I would probably clean the threads with pushing a rag through and twisted as needed.

If you use the pedal taps, I'd try using them simply tightening by hand without the holding tool.

I'm not seeing any pedal "Chasing taps" for sale, at least what I can find. However, an option might be to make your own out of an old pair of pedals.

https://www.hagerty.com/media/mainte...thread-chaser/
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Old 07-06-21, 06:44 PM
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Better have a LH thread one too
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Old 07-06-21, 06:54 PM
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A shot gun bore brush chucked in a drill motor.....
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Old 07-06-21, 07:34 PM
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Compressed air & an extra firm tooth brush.
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Old 07-06-21, 07:37 PM
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justinschulz9
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on the synapse we use, the rear of the left crank threaded pedal insert is where i tend to thread the die inversely
i never use the holding tool to make sure i "feel" it thread properly.
though i have never thought of using old pedals before
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Old 07-06-21, 07:39 PM
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Originally Posted by Bill Kapaun
A shot gun bore brush chucked in a drill motor.....
this is likely the best idea for this circumstance. consider my routine changed
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Old 07-07-21, 01:50 AM
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Tooth brush. If that isn't good enough, get a tiny brass, stiff nylon, or steel brush that is available in any hardware or auto parts store.

Or the cone shaped metal brush that is used to clean battery cables.

But what comes to my mind is that his those threads could get significantly caked with tough to remove grime? Aren't they always filled with pedal spindle threads? I've never seen it.
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Old 07-07-21, 07:30 AM
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Originally Posted by Bill Kapaun
A shot gun bore brush chucked in a drill motor.....
9/16" (0.56") "most" pedal threading
20 Ga - 0.615" ID
28 Ga - 0.55" ID

Brush will be a little larger in OD so a 28 Ga sounds good.
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Old 07-07-21, 09:21 AM
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Changed out a pair of pedals yesterday for a new pair I had bought a while back; they were getting noisy, and had play when I checked them. I put grease in the threads of crank arm, but didn't think to clean out threads first. Sucks getting older; I'd never have made that oversight when younger. Felt some grit when threading in New pedals, but no problem turning them in. After reading this thread, I'll never make that mistake again!
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Old 07-07-21, 07:29 PM
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Originally Posted by Chuckles1
Changed out a pair of pedals yesterday for a new pair I had bought a while back; they were getting noisy, and had play when I checked them. I put grease in the threads of crank arm, but didn't think to clean out threads first. Sucks getting older; I'd never have made that oversight when younger. Felt some grit when threading in New pedals, but no problem turning them in. After reading this thread, I'll never make that mistake again!
I would guess it would take a long long time, many many miles, going through a few pedals before it mattered.
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Old 07-10-21, 11:54 AM
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Originally Posted by juliywann
You need to lean it up against something or have someone hold the bike, place one foot on the crank arm and one foot on the hex wrench with a longer bar over the hex wrench. Then put all your weight on the extension and give a healthy push down. It will loosen.
Welcome the forum. This thread is not about pedal removal, but here's a better technique:
. Using feet and cheater bars, especially at the same time, can cause injury--ask me how I know.
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