cardiagn.com (a) Pressing the piston in with a screwdriver, use a pin or an equivalent to push the snap ring from the hole in the body then remove it with another screwdriver. (b) Remove the piston by pulling it straight out, not at an angle. NOTICE: If pulling it out at an angle, there is a possibility that the cylinder bore could be damaged. 10. REMOVE BRAKE BOOSTER ACCUMULATOR ASSEMBLY (a) Using SST, remove the accumulator. SST: 09318-12010 (b) Remove the silencer tube, spring and O-ring.