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Bit of crank help please.

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southern andy:
Bit of help needed please...

Fitted some cranks last weekend to my bike and all went smoothly till i took the bike for a small ride. I then noticed that the Non drive side bearing cup was starting to come out from the bottom bracket.
I thought it may be the spacer inside the bottom bracket being slightly too long. So tonight as i had a bit of time i thought i'd put the shorter one in.
Eventually worked out the tool and removed the non drive side, replaced the slightly shorter spacer to inside the bottom bracket and proceeded to refit the crank.

Job done after a lot of swearing so took it for a ride.

Looked down and it's started pulling out of the bottom bracket of the frame again.  :tickedoff:


Any one have a slight clue as to what's happening.

I hate cranks, always have done and always will do.


You can see where it protrudes from the BB by about 1mm here in the piccy.

pickle:
Have you got enough spacers on it?  Maybe the bolt isn't clamping against the arm but just clamping against the axle? Is there any sideways play in it?  Never had the BB cups work out

southern andy:
There is a very small bit of play, hardly anything though.

That's all my spacers used that it came with.

bobbysam:
I'm a BMX novice but I do know one thing.....if you have enough spacers and no play it's impossible for the cup to come out.

Gary72:
What can you see if you take both crank retaining bolts out, Is the axle all the way to the end of the splined part of the boss. If it is put another spacer/washer on it.
BB shells and axles come in various lengths. Hope that makes sense.
If not PM me your number and I'll give you a call.

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