Can't remove cranks?

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KingOfTheTailwind
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Can't remove cranks?

Postby KingOfTheTailwind » Sat Mar 16, 2013 12:21 pm

My Triban 3 developed a creaking sound coming from the BB/cranks last time I was out. So I bought a 8mm hex wrench and a crank puller to see if I could spot any problems.

So I'm trying to remove the drive side crank. The bolt comes off fine. I've fitted the crank puller, fully tightened the bit you screw in, but when I turn the handle nothing happens once it gets tight. The crank won't come off and doesn't appear to loosen at all. I've put a fair amount of force into it but don't want to use any more in case I damage the threads.

Any idea what I'm doing wrong?

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sungod
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Re: Can't remove cranks?

Postby sungod » Sat Mar 16, 2013 12:31 pm

some cranks need an extra bit put on the end of the puller, or in the hole, otherwise the puller threads bottoms out before the end pushes on the axle - the crank puller i have came with one, it's just a metal plug

that's not the greatest description, but it sounds like you need to fit that extra bit
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DesWeller
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Re: Can't remove cranks?

Postby DesWeller » Sat Mar 16, 2013 12:41 pm

Make sure that the thrust pad on the crank puller will clear the edges of the square hole in the crank.

If it doesn't, as sungod says, you can put a stud or something else in the bolt hole to stand the thrust pad off the crank a little bit.

If it does then it's either seized on (not impossible) or you're not winding enough load on.

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nicklouse
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Re: Can't remove cranks?

Postby nicklouse » Sat Mar 16, 2013 13:36 pm

so what are the cranks?
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DesWeller
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Re: Can't remove cranks?

Postby DesWeller » Sat Mar 16, 2013 14:07 pm

nicklouse wrote:so what are the cranks?


Usually Shimano 2300 aren't they? Square taper jobbies.

onbike 1939
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Re: Can't remove cranks?

Postby onbike 1939 » Sat Mar 16, 2013 14:16 pm

I'd guess that the wrong puller is being used.

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nicklouse
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Re: Can't remove cranks?

Postby nicklouse » Sat Mar 16, 2013 14:25 pm

DesWeller wrote:
nicklouse wrote:so what are the cranks?


Usually Shimano 2300 aren't they? Square taper jobbies.

who knows?
hence the question.

but if the OP has got the correct tools for the cranks/BB then more force is just needed.
"Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."

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crankycrank
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Re: Can't remove cranks?

Postby crankycrank » Sat Mar 16, 2013 14:38 pm

Also try pouring some boiling water over the crank before trying to pull it off again.

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KingOfTheTailwind
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Re: Can't remove cranks?

Postby KingOfTheTailwind » Sat Mar 16, 2013 15:00 pm

The thrust pad clears the edges of the square hole. I've tried using a nut to lengthen the thrust pad and still no joy. Can't get any more force into it.

The groupset is mostly 2300/Sora but the cranks are Prowheel Ounce. Square taper jobbie yes.

I'm taking it up to Decathlon. I'll let them try with my tool and their own.

Cheers for the replies.

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KingOfTheTailwind
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Re: Can't remove cranks?

Postby KingOfTheTailwind » Sat Mar 16, 2013 18:21 pm

The mechanic in the shop couldn't get my tool to work either. So I bought one of the ones he used - Var. Much better.

He also replaced the BB for free, you can't fault Decathlon.


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