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Resin Pads + Brake Fluid =**********??

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Resin Pads + Brake Fluid =**********??

Old 09-08-12, 10:24 PM
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dabee1106
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Resin Pads + Brake Fluid =**********??

I got some brake fluid on my resin pads when I was bleeding my shimano breaks the other day. Now they make a wierd squealing sound. Is there anything I can do to fix my pads or are they done for and time to replace********** Also what is everyones thoughts about resin pads? Good or bad?
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Old 09-09-12, 12:22 AM
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jimc101
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When your bleeding disc brakes, you are meant to take the pads out, Shimano calipers are supplied with a spacer for this purpose.

If you have contaminated the pads, the simplest option is to bin them, and replace with new. As you have now used the brake, you will also need to decontaminate the rotor, as if you just replace without, you will contaminate the next set.

For resin pads, they work fine for most riders
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Old 09-09-12, 01:06 AM
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mechBgon
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If you want to try something before throwing them away, heat them in the flame of a propane torch for about 15 seconds each, while reciting the correct spelling of the word "BRAKE" forwards and backwards. Thoroughly clean the rotors before reinstalling the pads; rubbing alcohol is a good start if that's all you have.
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Old 09-09-12, 02:49 AM
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Originally Posted by mechBgon View Post
Thoroughly clean the rotors before reinstalling the pads; rubbing alcohol is a good start if that's all you have.
+1

You have contaminated the disks a little now too, new (or cleaned) pads alone will possibly not solve the squeal.

When you have to buy new pads you might try ebay.
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Old 09-09-12, 03:12 AM
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009jim
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Originally Posted by jimc101 View Post
When your bleeding disc brakes, you are meant to take the pads out, Shimano calipers are supplied with a spacer for this purpose.
Surely you don't have to remove the pads just to do a brake bleed! Why?
Traditional brake fluid dissolves easily in water, so I would have just washed them.
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Old 09-09-12, 06:54 AM
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You can also use a slightly stronger solvent than alcohol, like acetone.
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Old 09-09-12, 07:31 AM
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"Surely you don't have to remove the pads just to do a brake bleed! Why?"

To prevent them getting contaminated by the bled-out fluid, as the OP has found.
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Old 09-09-12, 11:05 AM
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mechBgon
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Originally Posted by dsbrantjr View Post
"Surely you don't have to remove the pads just to do a brake bleed! Why?"

To prevent them getting contaminated by the bled-out fluid, as the OP has found.
Precisely. You do not just wash brake fluid off brake pads, it soaks into them. And last I checked, Shimano's mineral oil is not water-soluble either The torch approach has a chance, but no guarantees. Another reason for removing the pads is to fill the system with fluid while the caliper's pistons are fully retracted, so it's possible to fit new pads if/when needed.
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Old 09-09-12, 11:13 AM
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Only way to 'thoroughly clean' contaminated brake pads on disc brakes is break out a fresh set.
sintered or resin-organic no different procedure ..
you just messed up and that's part of the cost of learning, sometimes.
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