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  1. #1
    mtbr member
    Join Date
    Apr 2004

    Need Advice on XTR Calipers

    what a dummy I am!!! While bleeding my brake line, I accidentally pumped too much and one of the pistons partially came out of the caliper body. I pushed it back in (with my hands) but now they aren't articulating correctly (ie I have to squeeze the levers muliple times to get a little movement from the pistons). What do I need to do to fix this?

    Here's a little history of my stupidity in case anyone is interested (or wants to avoid the same mistake):
    I got a nice used set of XTR disc brakes at a great price. I needed to re-connect the front caliper and bleed the mineral oil (long, tedious process). I removed the brake pads (big mistake) so that I wouldn't accidentally contaminate the pads). I bled the line by opening the fluid reservoir and squeezing the lever back and forth (allowing tiny bubbles to percolate up and then refilling the reservoir). I pushed the pistons flush every so often but in the final stages of the bleed, I didn't check the pistons soon enough and one of the pistons partially came out of the caliper body, I pushed it back in but now the pistons aren't articulating correctly. I have to squeeze the levers a number of times before I get a little bit of articulation in the pistons.

    thanks for any help.

  2. #2
    Reputation: XSL_WiLL's Avatar
    Join Date
    Nov 2004
    It sounds like you need to rebleed. Use the Shimano bleed kit. It makes things so much simpler.

  3. #3
    mtbr member
    Reputation: lebikerboy's Avatar
    Join Date
    Jan 2005
    I've done the same thing on my XT's. You'll definitely need a rebleed. You did the right thing by removing the pads. Next time use some sort of a spacer. I use one half of a wooden clothes pin.
    Get over it!

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