11
Caliper Piston Removal
Remove the caliper o-ring.
Place each caliper half, piston side down, on a soft rubber mat or a
small section of inner tube on a flat surface.
Firmly press a rubber-tipped air chuck nozzle into the banjo port to
dislodge the piston from the caliper.
⚠ CAUTION EYE HAZARD
Wear safety glasses. The caliper piston may dislodge rapidly from the
caliper, which can lead to bodily injury or damage to the parts. Point
the caliper piston toward a rubber surface to prevent the piston from
becoming a projectile.
Remove the piston seal from each caliper body half.
⚠ CAUTION
Do not scratch the seal gland with the pick. Scratches could cause fluid
to leak when the brake is applied, which will contaminate the brake
pads and could lead to a brake failure.
Spray isopropyl alcohol inside each piston bore, the inside and the
outside of the caliper, and clean them with a rag.
NOTICE
If the brake system has been contaminated with mineral oil or DOT 5
fluid, flush all of the parts with soapy water, rinse them with clean water,
then allow all the parts to dry prior to rebuilding. Install new seals, a
new bladder, and replace the hose.
For the best braking performance, use only SRAM® DOT 5.1 fluid. If
SRAM fluid is not available, use only DOT 5.1 fluid or 4 fluid.
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