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Post by millwall on Jul 4, 2015 5:58:04 GMT -5
Hi I'm trying to get new brake pads in but it seems like they won't go how do I compress the piston flush again?
A step by step guide please I'm new
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Post by keikara on Jul 4, 2015 7:02:17 GMT -5
Step 1 remove caliper. step 2 using channel lock pliers or a c-clamp compress the piston back into the caliper. step 3 reinstall pads and install on bike. If the piston will not compress you can open the fluid reservoir to release pressure, however you may have to bleed the brakes afterwards.
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Post by toddmaples on Jul 4, 2015 23:16:37 GMT -5
Step 1 remove caliper. step 2 using channel lock pliers or a c-clamp compress the piston back into the caliper. step 3 reinstall pads and install on bike. If the piston will not compress you can open the fluid reservoir to release pressure, however you may have to bleed the brakes afterwards. Another option is to open the bleed valve on the caliper, compress, then top off resevoir. I prefer this method as it keeps the fluid fresh... |
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Post by millwall on Jul 5, 2015 8:29:45 GMT -5
OK I tried both methods and they still won't move  I rely need help  |
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Post by JoeyBee on Jul 5, 2015 8:41:38 GMT -5
Have you tried spraying them with a little brake cleaner then PB blaster or WD40. That way they would be cleaned and lubed.
Then attached a small hose to the bleeder valve and open the bleeder. The hose will help prevent a mess, and opening the valve will relief the fluid's pressure.
Now the Pistons should move with either the clamp method. Or using the old pad to push/pull the piston open.
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Post by JoeyBee on Jul 5, 2015 8:47:23 GMT -5
I just read the thread more carefully and notice you have already tried both methods.
The caliber does look pretty dirty and junky. Maybe the cleaning will help.
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Post by millwall on Jul 5, 2015 8:54:09 GMT -5
My caliper is not like most people I can't fit more then a few mm of the clamp inside and I threw my old pads away
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Post by toddmaples on Jul 5, 2015 9:36:25 GMT -5
Have you tried spraying them with a little brake cleaner then PB blaster or WD40. That way they would be cleaned and lubed. Then attached a small hose to the bleeder valve and open the bleeder. The hose will help prevent a mess, and opening the valve will relief the fluid's pressure. Now the Pistons should move with either the clamp method. Or using the old pad to push/pull the piston open. seconded. Clean and lube and try again. |
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Post by millwall on Jul 5, 2015 9:48:02 GMT -5
So put a little bit of lube around the piston? I was scared to do this in case I contaminated something
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Post by JoeyBee on Jul 5, 2015 10:23:15 GMT -5
So put a little bit of lube around the piston? I was scared to do this in case I contaminated something Yes, I was thinking of WD40 or PB Blaster. Since both are liquid and penetrate better. Before you finish the job a light coat of brake lube will help avoid this problem next time. |
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Post by millwall on Jul 5, 2015 10:45:54 GMT -5
Okay thanks guys the bike had no brakes and the guy who sold me itnsaid they were new pads ...  |
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Post by JoeyBee on Jul 5, 2015 11:26:18 GMT -5
My caliper is not like most people I can't fit more then a few mm of the clamp inside and I threw my old pads away You need to be more specific. Was the bike's brakes not working or missing parts? When communicating on the Internet, words and specifics are very important. Now it sounds like you need a new caliper to replace a broken on. That would explain why the pistons are not moving. But it's hard to say when you keep shifting the problem. |
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Post by mftic on Jul 5, 2015 11:54:54 GMT -5
I always put the old pads back in and pry them apart with a screw driver. That way you don't damage the pistons and just throw away the old pads after. If you have added fluid since the pad have worn away you may have to open the master cylinder and remove some fluid so it doesn't over flow when compressing pistons.
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Post by millwall on Jul 5, 2015 12:12:37 GMT -5
Noo its total fine it all works moves but I cant compress it back in I know the piston is not froze
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Post by JerryScript on Jul 5, 2015 12:37:50 GMT -5
Put a piece of wood over the piston and use a C clamp to compress it.
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