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Caliper stuck

  • eddlane
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28 Sep 2022 10:24 #245167 by eddlane
Caliper stuck was created by eddlane
Hi all
Kingpin change underway

caliper bolts (back ones) stuck solid and slightly rounded even before I started hammering away 

Unless any tips I’ve tried everything I think it’s angle grinder time. Fallen at the first hurdle!

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  • eddlane
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28 Sep 2022 12:28 #245173 by eddlane
Replied by eddlane on topic Caliper stuck
 honesty time. 

is this salvageable if I can drill the carrier bolts out?

I had to beat the living biscuits out of it to get it off. 

I have a vague recollection of a garage wanting to put a new caliper on once and this may well be the culprit. 

so, saveable or no?
 

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28 Sep 2022 17:27 - 28 Sep 2022 17:41 #245182 by Scimike
Replied by Scimike on topic Caliper stuck
Yes it's salvageable, what's difficult to determine is how much time and effort it will take.
THe good news is you have plenty of bolt to get hold of.

Things to try:

1)Heat it up carefully, if you can boil it in oil and leave it cool in it before you get grips on the bolts. 
2) Weld a nut on the top of the bolt stud, the heat may shock it. It also gives you something to turn.
3) Drill a  pilot hole down the centre of the bolt, this allows a little shrinkage and may release it.
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If it starts to move turn it "in / out" as you go, don't just attempt to wind it straight out. Penetrating oil or any thin oil helps at any stage.

Even after all this the threads could be damaged, you won't know until you get it out. Still options if they are (helicoil etc), but it could be cheaper to source a good used item at this point. If you can get a good one quickly for a few £ it not worth it, if you can't or they are ££££££ then saving it is your best option.
I would have a go, but that's just me. Good luck, Mike

 

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Last edit: 28 Sep 2022 17:41 by Scimike.

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  • eddlane
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28 Sep 2022 17:56 #245183 by eddlane
Replied by eddlane on topic Caliper stuck
Thank you!

Literally can’t be bothered haha, new one is £60 so just bought it.

Not sure if I can be bothered to do the kingpin the other side now this has been such a fuss!

See how I feel in the morning after some beer.

End of play today saw it all back together with new kingpin bearings and swivel seal (hopefully all done right!?) just waiting for caliper carrier tomorrow morning then it’s a late night tomorrow, hoping the other caliper is better to remove but I’ll be extra extra careful now I know how bad it can be

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28 Sep 2022 17:58 #245184 by DrRobin
Replied by DrRobin on topic Caliper stuck
My standard solution is to heat it up with a blow lamp, get it good and hot then it might come out with a pair of grips. Or you could try a thread extractor.

If not, try drilling it out, use a small drill and work your way up, once you get over 3/4 of the diameter, it will probably just turn out. With a bit of luck the threads will be okay, otherwise a tap might be needed to clean them up.

New ones appear to be around £34, probably a pattern part, so you don’t have much to loose.

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  • eddlane
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29 Sep 2022 10:03 #245197 by eddlane
Replied by eddlane on topic Caliper stuck
 right. 
Got myself a new fella for the caliper. 

next question

when rebuilding, can I copper slip the carrier bolts and the pin bolts to avoid this happening again? I know there are some things one shouldn’t copper slip just wondering if these are they? The guide has their torque settings also. 

then it’s onto the other wheel and hoping things are less grim. I’m going to try heat and patience before any angle grinding….




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