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I have no Rear Brakes Disc Mountain Bike

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I have no Rear Brakes Disc Mountain Bike

Old 07-17-08, 08:10 PM
  #1  
KiaTia
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I have no Rear Brakes Disc Mountain Bike

Help I got a little carried away cleaning my bike and I think I got some WD 40 on my rear disc and now I have no rear brakes at all! These are 3 or 4 year old Hayes units do I need new pads or what can I do to fix them? I tried using carb cleaner on the disc and the pads but all that did was make them bark like a duck and still no braking.

Thanks
Mike
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Old 07-17-08, 08:16 PM
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FlatFender
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new pads.

Ive heard about baking them in the oven, but if they are 3-4yrs old, you could probably use new pads anyways.
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Old 07-17-08, 11:23 PM
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Michel Gagnon
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You may try alcohol and quite a few rides to see what happens. Wipe carefully the disk and the pads too. Then reassemble the brakes.

The brakes will squeal like crazy for a little while, and for the first few shots, you will have dicey brakes (which is why you have a front brake... which does most of the job anyways). But then it will be OK.

Of course you could do the first "trial runs" at home, and then ride conservatively at first.
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Old 07-17-08, 11:29 PM
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If you're desparate to ride and don't have time to get the new pads try boiling the pads in a pot of water for an hour or two. Just get it boiling and then turn back to a simmer so the water keeps rolling. A couple of drops of dish detergent in the water will help as well. Just don't use more than two drops or you'll have suds soup all over the place.

While the Pad Soup De Jour is simmering use some brake cleaner on the rotors along with a wipe from paper towels or CLEAN rags to remove any residue of the other stuff from the discs.

This may or may not be perfect but it should get you through a ride or two. But new pads are in your near future.
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Old 07-17-08, 11:32 PM
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Originally Posted by Michel Gagnon View Post
You may try alcohol and quite a few rides to see what happens.
Just be aware...in many places, riding a bike while under the influence is against the law.

My take: Get new pads, it's worth it. Even if the old pads could somehow be made viable, replacing pads will keep your rotors in better shape and lasting longer.
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Old 07-18-08, 07:44 AM
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I got some oil, which may be different from WD 40 in terms of damaging the rotors, on my rear pad and I just slammed them going down a huge hill several times and it just sort of baked it off.
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Old 07-18-08, 11:21 AM
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Don't use CARB cleaner! most Carb Cleaner has lubricant component to lube the moving parts of the carburetor.

You may be able to use BRAKE cleaner, which does not have a lubricant component, and which will displace most hydrocarbons on contact - then burn off with a few stops on level pavement. These may make the pads squeal, but this is a set-up issue, not a material issue.

Also, make sure that you select a brake cleaner that inidcates that it is safe to use or won't harm rubber components. There are some kinds that contain organo-halides (di-chloromenthane, carbon tetrachloride) that are nasty, and can breakdown rubber and glue products.
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Old 07-18-08, 12:05 PM
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New pads and wipe down the disc with brake cleaner or isopropyl alcohol.
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