2002 Bombardier Quest 650XT Service Manual, Page 271Get this manual
Section 09 BRAKES Subsection 02 (HYDRAULIC BRAKES)
CAUTION: Brake discs should never be machinedTurn the disc by hand and check run outDISC MINIMUM THICKNESS DISC RUN OUT (max 3.5 mm (.13 in) 0.5 mm (.02 in)
Removal
CAUTION: Replace the bearing when the brake disc is changedRemove caliper as described previouslyAfter removing the caliper, suspend it out of the wayCAUTION: Don't let the caliper hang by the hose and don't stretch or twist the hoseNOTE: Wheel hub has to be removed from vehicle to replace brake disc no32Remove cotter pin and unscrew castellated nutRemove O-ring