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Post by m40man on Sept 13, 2015 10:26:26 GMT
Been wrestling with a stuck caliper pin - as I'd like to change the pads on my 600 Divvy. Tried: Good quality allen key socket - no joy, felt like it wanted to slip / round off. Impact driver with the same 5mm key. Air impact gun - with fresh 5mm allen & then with Torx key hammered in. All I'm left with is this:  Next steps anyone? (I could split the caliper if I can reach in with the angle grinder to cut the pin, but then I'd have little left to apply pressure to, to undo the seized thread  . ) Anyone got a D6 rear caliper they want to sell  ? |
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Post by HRHpenfold on Sept 13, 2015 11:37:27 GMT
Heat it up with a blow torch, then tightly clamp a pair of mole grips, and try that, If you only have a heat gun, heat the caliper mount, as alloy expands more quickly than steel! If you can remove the other pin, do so and tap the caliper to and fro to break the corrosion in the caliper first! Have you tried a warranty claim first!  |
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Post by m40man on Sept 13, 2015 11:50:21 GMT
No way to get mole grips on that . In case a warranty claim proves fruitless, I could take it to a chap I know, greatest man that ever lived, next weekend. He's a bright bloke & might be able to come up with something  . |
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Post by bev on Sept 13, 2015 12:21:42 GMT
Cut a slot in the side and tap with a sharp chisel in the slot until it turns out. Worked on Wullie's N. Don't know how I'm going to get the sheared bleed nipple out though. |
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Post by HRHpenfold on Sept 13, 2015 12:21:49 GMT
Yes bring the caliper up, we can mill the bolt off and re tap the thread, if heat doesn't work, I think we have some stud removers, which will grip the head!
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Post by HRHpenfold on Sept 13, 2015 12:24:12 GMT
Cut a slot in the side and tap with a sharp chisel in the slot until it turns out. Worked on Wullie's N. Don't know how I'm going to get the sheared bleed nipple out though. Good idea, but use a centre punch rather than cutting a slot, That's after you have heated the mount! |
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Post by HRHpenfold on Sept 13, 2015 12:28:16 GMT
Cut a slot in the side and tap with a sharp chisel in the slot until it turns out. Worked on Wullie's N. Don't know how I'm going to get the sheared bleed nipple out though. I fixed one of these last week, I drilled out the old nipple, and re tapped a new thread, unfortunately, I drilled the threads as well, had to tap a larger thread, It was on a tdr125 though it looked the same caliper! Bring it down, drilling works 50% of the time, after that you can fit a bolt and drill and tap that! I have some new nipples in stock |
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Post by m40man on Sept 13, 2015 12:46:25 GMT
Should we re-name the up-coming coast to coast weekend? How about "Buggered Calipers Weekender"  ? |
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Post by teejayexc on Sept 13, 2015 20:07:45 GMT
Should we re-name the up-coming coast to coast weekend? How about "Buggered Calipers Weekender" ? How about, ' M40 man brings a bike to be repaired....again, weekender'.  |
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Post by cam7777 on Sept 13, 2015 20:24:23 GMT
You love doing rear brakes, don't you?
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Post by bev on Sept 14, 2015 6:17:20 GMT
Cut a slot in the side and tap with a sharp chisel in the slot until it turns out. Worked on Wullie's N. Don't know how I'm going to get the sheared bleed nipple out though. I fixed one of these last week, I drilled out the old nipple, and re tapped a new thread, unfortunately, I drilled the threads as well, had to tap a larger thread, It was on a tdr125 though it looked the same caliper! Bring it down, drilling works 50% of the time, after that you can fit a bolt and drill and tap that! I have some new nipples in stock Actually sounds a decent bodge.  I was considering drilling to the thread diameter then running a tap in to clean the thread.
I'll give it a go one lunchtime this week and if/when I cock it up I'll bring it down for the bodge.
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I was considering drilling to the thread diameter then running a tap in to clean the thread.