Crank is moving side to side in BBSHD

[Gagsinio]

Hi,
My BBSHD crank has started to move by side to side in the BB. The crank rotates normally, but there is definite side to side movement, resulting in a creaking noise. Thought the crank arms were a bit loose, but this was not the problem. Any information gladly received,

Cheers,

G

 

[Fordulike]

Hi,
My BBSHD crank has started to move by side to side in the BB. The crank rotates normally, but there is definite side to side movement, resulting in a creaking noise. Thought the crank arms were a bit loose, but this was not the problem. Any information gladly received,

Cheers,

G

If the BBSHD is put together anything like the BBS02, then the crank spindle is held in with a large slotted ring nut, locked in place with another slotted ring nut.

You can use needle nosed pliers to unscrew the outer lock nut, tighten the inner one, then lock down the outer one. Crank arms need to be removed to carry this out.

 

[Gagsinio]

Hi, the lock nuts are tight, both the inner and outer one, the crank is moving inside this, so guessing it might be a bearing? Have also checked crank arms are tight, the play is straight through the crank, i.e. you can move the crank from left to right,if you wiggle it with the pedals, if you were looking straight down from the seat to the floor.

 

[tommie]

BBS HD strip down

may give you some idea.

 

[Deleted member 4366]

The most likely candidate is the thrust bearing, which you can buy from Luna for about $6 plus shipping cost. It's also available from Faster Bikes in Europe but 16 Euros plus shipping. I've bought other spares from Luna and they came very quickly.

https://lunacycle.com/parts/bafang-parts/bbshd-parts/bbshd-3-piece-thrust-bearing/

 

[Gagsinio]

Thanks for the quick replies, will order up a bearing