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Rear caliper pad retaining pin stuck
Posted: Wed Jul 17, 2013 5:24 am
by lutorm
I managed to round the head, even after 24h of PB blasting and using a hot air gun...
What's the best way to get it out now? I can imagine either trying a bolt extractor in the head, or cutting the end of the pin off the back, taking out the pads, and then trying to get a purchase on it from the back. I hope the threads in the caliper are salvageable...
Re: Rear caliper pad retaining pin stuck
Posted: Wed Jul 17, 2013 8:37 am
by CMSMJ1
it has a cap on top of another bolt - so have you destroyed the cap or the bolt?
Drill it....
Re: Rear caliper pad retaining pin stuck
Posted: Thu Jul 18, 2013 6:11 am
by lutorm
CMSMJ1 wrote:it has a cap on top of another bolt - so have you destroyed the cap or the bolt?
Drill it....
The actual pin. The cap came off without a problem.
Will try an extractor.
Re: Rear caliper pad retaining pin stuck
Posted: Thu Jul 18, 2013 2:29 pm
by The Novice
impact screwdriver got mine out. In fact its a great thing to have around and I use it loads.
Re: Rear caliper pad retaining pin stuck
Posted: Thu Jul 18, 2013 7:07 pm
by bikemonkey
The Novice wrote:impact screwdriver got mine out. In fact its a great thing to have around and I use it loads.
Best £15 I've spent.
Re: Rear caliper pad retaining pin stuck
Posted: Thu Jul 18, 2013 9:25 pm
by lutorm
The Novice wrote:impact screwdriver got mine out. In fact its a great thing to have around and I use it loads.
How did you get purchase with it? Did you just jam the screwdriver into the edges of the hex hole?
Re: Rear caliper pad retaining pin stuck
Posted: Thu Jul 18, 2013 9:37 pm
by bikemonkey
You can get ones with interchangeable bits
Re: Rear caliper pad retaining pin stuck
Posted: Fri Jul 19, 2013 4:11 am
by lutorm
bikemonkey wrote:You can get ones with interchangeable bits
Well, but all I have is a round hole now. Even if I could find a round bit, I doubt it would do much good...
Re: Rear caliper pad retaining pin stuck
Posted: Fri Jul 19, 2013 5:05 pm
by Neosophist
lutorm wrote:bikemonkey wrote:You can get ones with interchangeable bits
Well, but all I have is a round hole now. Even if I could find a round bit, I doubt it would do much good...
If you want to get a bit brutal with it you can do what many people have done with good effect and that is to get a Torx (star bit) that slightly bigger than the hole you have and hammer it in then use that to get it out.
Re: Rear caliper pad retaining pin stuck
Posted: Fri Jul 19, 2013 7:31 pm
by lutorm
Neosophist wrote:lutorm wrote:bikemonkey wrote:You can get ones with interchangeable bits
Well, but all I have is a round hole now. Even if I could find a round bit, I doubt it would do much good...
If you want to get a bit brutal with it you can do what many people have done with good effect and that is to get a Torx (star bit) that slightly bigger than the hole you have and hammer it in then use that to get it out.
Torx bit! Brilliant! That'll be my next try.
I cut the back off the pin, got the pads out, and then gripped that. No success - the pin just twisted.
I also tried the bolt extractor. It just chewed up the hold I had drilled without budging the bolt. (The bolt material seems quiet soft...)
I guess next is to pull out the propane torch. I'm replacing the seals anyway.