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Brake caliper.

Posted: Wed Sep 21, 2022 6:01 pm
by Allan mcl
My front caliper is sticking on slightly,there is a slight noise which goes off after about five miles if I don't touch the brakes.I am wondering would it be best to buy a new caliper or fit a service kit.
Cheers
Allan

Re: Brake caliper.

Posted: Wed Sep 21, 2022 6:18 pm
by Peter-S
Personally I would take it off, pop the piston out and give everything a good clean , it probably has years of crud in it. Really it depends if you are confident in fiddling around with it.
If you go the new route I would do both sides.

Re: Brake caliper.

Posted: Wed Sep 21, 2022 6:24 pm
by Allan mcl
If I was to clean the piston is there anything I need to know before I start or is it a case of ordering a kit and getting stuck in.

Re: Brake caliper.

Posted: Wed Sep 21, 2022 9:16 pm
by Mc Tool
They are a piece of cake to do .....probly the hardest part will be undoing the mounting bolts 😀. Very basically you use compressed air to push the pistons out (then be surprised at just how much crap is in there ), clean things up and refit pistons with new seals (one square section O ring and a dust cover) . You dont need to split the calipers but if you do there is an o ring in there that should also be replaced . Gotta be a special one as ordinary rubber dont like brake fluid ......there will probly be one in the seal kit .
Then bleed the whole brake system ....inc the back brakes ......the idea being to replace ALL the brake fluid . Brake fluid is hydroscopic ( absorbs water ) and its water in the fluid that usually starts the whole sticky piston thing off. Getting new fluid to the rear is a good thing otherwise you will soon be learning how to strip, clean and rebuild them too.
I haven't looked but Id be stunned if there isn't a few tutorials on youtube

Re: Brake caliper.

Posted: Thu Sep 22, 2022 9:27 pm
by pbar
Allan mcl wrote: Wed Sep 21, 2022 6:01 pm My front caliper is sticking on slightly,there is a slight noise which goes off after about five miles if I don't touch the brakes.

I've had this too. Defintely take the calipers off and pop the pistons out, as Peter suggests, clean them all up and grease them up using the correct grease, makes a world of difference. They are incredibly basic when you get to grips with them.

Re: Brake caliper.

Posted: Fri Sep 23, 2022 12:08 pm
by Bug
No one has yet pointed out that once one piston has popped out you will need to refit it and clamp it in place to get the other one out.

Re: Brake caliper.

Posted: Fri Sep 23, 2022 6:34 pm
by Allan mcl
Thanks for the replies, I have ordered a kit which is due on Monday so will try and make a start this weekend.

Re: Brake caliper.

Posted: Sat Sep 24, 2022 12:00 am
by pbar
Bug wrote: Fri Sep 23, 2022 12:08 pm No one has yet pointed out that once one piston has popped out you will need to refit it and clamp it in place to get the other one out.

I used that method last time, although previously I have popped one piston out then put my thumb over the hole to pop the other out. Plenty of rags in there to try to reduce the pain!

Re: Brake caliper.

Posted: Sat Sep 24, 2022 9:30 am
by pbar
Allan mcl wrote: Fri Sep 23, 2022 6:34 pm Thanks for the replies, I have ordered a kit which is due on Monday so will try and make a start this weekend.

Good one, just keep asking questions on this thread if you need to, you will soon have it sorted.