Removing crank w/o puller

Schoie81

Hi,

For reasons we wont go into :shock: , I need to remove a pedal crank from my bike without using a crank puller. Anyone got any tips on how to do this?

Cheers

cooldad

What sort of interface?

Square taper - undo the bolts and ride. Might injure the cranks though.

Stick a bit of wood behind and hammer.

Waggle it.

All of the above.

Schoie81

Thanks cooldad - yes, it's a square taper. So if I undo it all, and ride it - it'll likely eventually come off on it's own? Bit of wood looks best method to try.

Any mileage in using a wedge behind the crank and forcing that between the crank and the frame - or could that risk damaging something else?

cooldad

Crank puller is a few £s - I'd get the right tool ideally.

WinNT

use something like this

keef66

If you really must do it without the proper tool you could try loosening the bolts a bit then whacking them smartly. That may shock the crank free. Be aware it also might not do the bearings any good though...

Giraffoto

Get a couple of friends to hold the bike up by its crank and use a piece of hard wood and a hammer to knock the crank axle out? I'm guessing here that the threads in the crank are stripped?

larkim

I think you need to go into the whole story of why a crank puller can't be used, tbh!

wilberforce

I recently bought an old 2nd hand Carrera Vulcan to act as a university commuter for my son.
Decided to strip it first and ensure at least mechanically it was sound as BB was shot.
Threads for cranks were shot so unable to use proper crank puller. Tried bearing puller but unable to get sufficient purchase for it to actually have any effect. General hammering to try and force crank off also had zero effect, along with application of some heat.
Last resort was my trusty angle grinder which certainly did the job, but at the expense of the cranks.
Hope you have better luck!

Schoie81

As some have assumed now, I've stripped the thread off the inside of the crank, so crank puller not a possibility - I have a crank puller, and have used it to remove the other crank, but the chainiring side thread is no more. Totally my fault, and lesson learnt. Not been sleeping well so brain obviously wasn't fully engaged - that's my excuse and I'm sticking to it!!

Sounds like it's going to be a struggle however I do it. Only want it off to give it a good clean and to check the BB, so might just leave it on for now....

cooldad

Leaving things alone is often the best solution.

penguin_of_death

http://www.halfords.com/cycling/bike-ma ... ank-puller

May be worth a try, or cheekily suggest your local Halfords order one in for their mechanic to use and test on your bike

The Rookie

If the BB is OK, then it's OK, not much to check on a sealed bearing!