Xo disc brake help - sheared bolts

[ishaw]

I recently picked up a cheap set of these brakes in the hope I could rescue them. I'm sure I can bleed and if needs be, service the seals, but a challenge I was not expecting is the pad pins have sheared bolt heads, so nothing to unscrew them exists.

Any ideas on how I could get them out, and find replacements?

Tips on bleefing/servicing would also be welcomed, but pin removal is priority 1.

 

[KermitGKona88]

Re:

I am taking it they are too small to get easy outs into ?

 

[KermitGKona88]

Re:

Just seen these

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[ishaw]

Re:

They are pretty small. I'll check my easy outs and see if they will work....

 

[integerspin]

If you can't drill it out weld a nut to the nub and unscrew it, the heat cycle loosens them.

 

[mattr]

Is there a nub sticking out the back of the caliper you can get some purchase on?
Most pad retaining pins pass completely through the caliper so you can get a spring clip on the end.
Failing that, just drill the whole thing out and use a split pin like the lower end shimanos do.

 

[Duxuk]

Is there a nub sticking out the back of the caliper you can get some purchase on?
Most pad retaining pins pass completely through the caliper so you can get a spring clip on the end.
Failing that, just drill the whole thing out and use a split pin like the lower end shimanos do.

I'm an experienced bodger and I agree.

 

[tufty]

Are you sure they are screws? From the diagrams I've found, they look to be smooth pins with spring clips retaining them on the back end. We're talking the thin pin that runs through the middle, right?

[edit]

Ah, I'm an eejit. I'd try getting some pliers onto the back end of the pin and screwing it "in" from that side. Won't hurt to give it a bit of tappety-tappety-tap beforehand, steel in alu corrosion is often helped by this (but you have very little material in the caliper, so you can't really twat it), or getting the pin itself very hot (and then, of course, allowing it to cool) before trying.

Other options are drilling (particularly with a left handed drill bit) or hitting it with a carbide burr, electrochemical means (spark erosion), welding onto the end of it (unlikely to work on a bolt that takes a 2.5mm hex key). I'd avoid "easy outs" like the plague.

 

[ishaw]

Re:

I had a think and I'll probably be able to turn it via the exposed shaft between the calliper halves.

Need to source some spare bolts,any ideas on a source for these as I've only found very expensive ones, or very expensive pads that come with them.

Advice on rebuild kits would be good, not sure what I need yet though, probably need to bleed to see how they are first.

 

[mattr]

Just use the Shimano deore level split pins. About a quid for 2 (Shimano price) or tuppence ha'penny for 40 (motor factors price)