brake lever pivot stuck (formula)

[jr1703]

i recently purchased a pair of formula rx brakes and while tightening the pivot bolt it snapped i have ordered a replacement but cant get the old one out there is no pinch bolt and it spins freely but wont come out any advice much appreciated.

 

[Yellow Saddle]

We can't see much. Does your camera have a focus feature?

 

[jr1703]

I tried to get a better one

 

[iluvmybike]

You need to dismantle it from the piston plunger to release the lever - from what I remember from when I did one of these you need to put a small allen key in the end of the piston plunger - part 21 on the diagram https://www.rideformula.com/wp-content/uploads/manuals/en/769) and unscrew this all the way. That will release the lever and the barrel/pivot. It's a bit fiddly getting it back in but patience pays

 

[jr1703]

You need to dismantle it from the piston plunger to release the lever - from what I remember from when I did one of these you need to put a small allen key in the end of the piston plunger - part 21 on the diagram https://www.rideformula.com/wp-content/uploads/manuals/en/769) and unscrew this all the way. That will release the lever and the barrel/pivot. It's a bit fiddly getting it back in but patience pays

thanks for the advice.
I have disassembled the lever partially but I cannot see how the piston affects the pivot as it is a separate part and it doesn’t touch the lever itself.

 

[Yellow Saddle]

Thanks, the better photos do help.
Is my take on this correct: you cannot get the pivot bold, which, as in the middle photo above, has a hex socket cap i.e. the silver allan-keyed bolt in the centre? Is that correct?
Further, if the above is how I see it, does then hex bit then just turn without coming out? Yes/No?

Just to jump the gun a bit in case you say yes to both, those pivots usually have the screw thread on the end of the thin bit. But I'll explain once I'm sure the above is the problem.

 

[jr1703]

Thanks, the better photos do help.
Is my take on this correct: you cannot get the pivot bold, which, as in the middle photo above, has a hex socket cap i.e. the silver allan-keyed bolt in the centre? Is that correct?
Further, if the above is how I see it, does then hex bit then just turn without coming out? Yes/No?

Just to jump the gun a bit in case you say yes to both, those pivots usually have the screw thread on the end of the thin bit. But I'll explain once I'm sure the above is the problem.

Yes it is the silver bolt with the Allen key head
And the Allen key just turns it round

 

[Yellow Saddle]

Yes it is the silver bolt with the Allen key head
And the Allen key just turns it round

OK then. I suspect it is just held in place by magic, or an O-ring or something. Try gently punching it out.
Can you confirm that the other end that broke off has a screw thread on the end and then morphs into a blank shaft as it goes toward the hex end?

 

[jr1703]

OK then. I suspect it is just held in place by magic, or an O-ring or something. Try gently punching it out.
Can you confirm that the other end that broke off has a screw thread on the end and then morphs into a blank shaft as it goes toward the hex end?

View attachment 512322

The end that is stuck is the female bolt
Which is a blank shaft I have tried tapping it out but it only comes out about halfway and stops .

 

[jr1703]

I managed to sort the issue by using a g clamp a parallel punch and a socket to push the bolt out.

 

[Yellow Saddle]

I managed to sort the issue by using a g clamp a parallel punch and a socket to push the bolt out.

I love it when a plan comes together. So what held it in place in the end?

 

[jr1703]

I love it when a plan comes together. So what held it in place in the end?

I don’t know exactly but I think the top of the female bolt was expanded in some way by the bolt stuck in it .