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Mechanical - removing gxp crankset

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Hiya,

Trying to remove an old X5 double crankset from my commuter.

8mm, through the self extracting crankbolt, anti clockwise, right?

Won't budge.

Trying hitting the Allen key with a rubber mallet, no effect.

Don't have very strong hands (carpal tunnel), any ideas?

Cheers Alex


 
Posted : 05/08/2022 5:15 pm
 Yak
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Yeah. Don't hit it though. Put a longer bar over the allen key for leverage. It shouldn't take too much force.


 
Posted : 05/08/2022 5:21 pm
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2' long breaker bar and stand on it while also standing on the other pedal to stop rotation.

It shouldn’t take too much force.

😂


 
Posted : 05/08/2022 5:22 pm
 Yak
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^ It's gxp, not dub!! Dub needs all that + a goat sacrifice. Gxp needs a firm tickle.


 
Posted : 05/08/2022 5:26 pm
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+ a goat sacrifice.

Will try that. Sounds less painfull than pedal pins to the shins.


 
Posted : 05/08/2022 5:28 pm
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I’ve always found GXP and DUB take the same amount of effort to crack the bolt off.

You need a bigger lever than an Allen key either way. I usually use a breaker bar style lever and most of the time it then doesn’t need hitting / standing on.

Wouldn’t hurt to soak the bolt in plusgas / any other equivalent anti seize type spray for a few hours first.


 
Posted : 05/08/2022 5:32 pm
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Supporting the Allen key/ socket attachment where it comes out of the bolt (eg a car jack and a block of wood) helps prevent it coming out and mashing the bolt. Getting the frame standing vertical and the Allen key nicely supported is a faff, but means you can stand on your extensiom/ breaker bar with more confidence, indeed bounce up and down on if needed.


 
Posted : 05/08/2022 7:40 pm
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Lefty loosey, as above a longer lever should do it as they're on quite tight. Can you slide a pipe over your allen key if you don't have a longer ratchet/breaker bar


 
Posted : 05/08/2022 8:19 pm
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As above, using a breaker bar makes a huge difference. To stop the crankset rotating, I sometimes take off the non-drive side pedal, and slot a 2ft length of 2" plastic pipe over the crank. Works a treat.


 
Posted : 05/08/2022 9:45 pm
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Thanks learned sages. I shall procure a breaker bar tomorrow.

A whole new world


 
Posted : 05/08/2022 11:54 pm