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  1. #1
    swag ho Administrator
    Reputation: francois's Avatar
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    contaminated pads question...

    I just finished building a brand new bike and had a little brake fluid problem. I think some mineral oil got in the front pads (xtr brakes). It's squeeling under heavy braking. The rear works perfectly.

    Are these pads hosed? Can I clean/salvage them? Where can I get XTR pads and how much?

    thanks,
    francois

  2. #2
    mtbr member
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    For mineral oil on metalic pads, I use a camping stove to burn oil
    on the pads. Don't let them (pads) become red.
    You know they are OK when they stop smoking.

    For softer pads, semi metalic or organic, just boil
    them for a good 15 min.

    Important thing: don't put cold water on the pads
    when they are verry hot because the pad material
    can separate from the ''back plate''... It happen to
    me with Hope pads.

    I hope that you understand, I don't realy speak english,

    Philippe.

  3. #3
    (aka SS_MB-7)
    Reputation: 1speed_Mike's Avatar
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    Bake 'em...

    I've baked several pads (Hope C2 Pros, Hope Minis, Formula B4, etc.) after fluid contamination....each, with excellent results. Simply place the pads pad-side-up on a cookie sheet, cook at 400F for ~20 minutes. Be sure to open the windows and crank-up the fan, because it will get smokey.

    I used to place them face-down on an oven element at med-high until the smoking stopped. However, since getting a fancy new oven with an element-less top, I've opted to baking the pads instead....my wife would kill me if she got me cooking my pads on the stove top.
    Ride Hard,
    Mike B. (MCM# 7.77)
    http://www.one-speed.com

  4. #4
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    Shimano squeal.

    Probably an unrelated problem but I just finished the same buildup (minus the oil on the pads) and it ran quietly for about 2 hours, then the dreaded squeal began. I haven't figured out the problem yet, but from the archives it seems as though the problem might be uneven brake mounts. I've got the metal pads in at the moment, but might resort to one metal/one resin to see if that helps for a short term fix. Any other ideas?

    -Derek

  5. #5
    (aka SS_MB-7)
    Reputation: 1speed_Mike's Avatar
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    Quote Originally Posted by derek
    I've got the metal pads in at the moment, but might resort to one metal/one resin to see if that helps for a short term fix. Any other ideas?

    -Derek
    I've only ever used the metal/resin combo and it has been perfect. Plus, this also gives you an extra set of pads.
    Ride Hard,
    Mike B. (MCM# 7.77)
    http://www.one-speed.com

  6. #6
    mtbr member
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    Thanks.

    Quote Originally Posted by 1speed_Mike
    I've only ever used the metal/resin combo and it has been perfect. Plus, this also gives you an extra set of pads.
    I switched to one of each, and no more squeal. Now hopefully I don't end up with the non-retracting piston.

    -Derek

  7. #7
    Trail rider and racer
    Reputation: Trevor!'s Avatar
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    Quote Originally Posted by 1speed_Mike
    I've only ever used the metal/resin combo and it has been perfect. Plus, this also gives you an extra set of pads.
    For what its worth I picked up two sets of pads at the LBS and all they had was metallic. I have always gone 1 metallic/1 resin but have not found a single difference between the two different combinations. Modulation seems about the same and brake power also seems about the same. I assume this combination makes for a good amount of noise though during winter and wet riding.

    All that being said I will make use the resin/metalic combo once I run these pads down.

    Also, the resin pads wear out very quickly in sloppy conditions.

    Trevor!

  8. #8
    umm...yea
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    Good job! Get some contact cleaner....

    Get some automotive brake cleaner or better yet, contact cleaner. Liberally spray the pads down (read: soak 'em). This should dissolve any oil residue left in the pad material and they should be OK.

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