Join Date: Jul 2006
Location: Sammamish, WA
Bikes: Cannondale Prophet, Specialized S-Works SL2, Specialized S-Works Stumpjumper
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Yep, check that the spring is in place and the caliper appears to be properly assembled. Assuming that the assembly is good and assuming that the brake lever has good pull and feedback, pull the caliper off the bike and remove the pads to prevent them from being contaminated. Carefully squeeze the lever until the pistons are extended; it's not necessary to extend them all the way. Once the pistons are extended dribble a drop or two of mineral oil on the exposed piston. Squeeze the pistons back into the caliper, squeeze the lever to extend them a bit, and dribble another drop or two. After that, reassemble the caliper and reinstall it ont he bike. Align the caliper position so that the pads don't rub the rotor and tighten the mounting bolts. The brake fluid will help to lubricate a sticking piston.
If the problem is fixed I'd go ride it to give the caliper a workout; don't allow it to sit or you may be doing this all over again. After a few rides and some normal use your caliper should be in good shape. If not, try bleeding the brakes and failing that you may need to rebuild the caliper but I don't know what options you have for that with XTR.
Last edited by mcoomer; 08-06-08 at 09:30 AM.