Mitsubishi Electric Lancer Evolution-VII Workshop Manual page 746

BASIC BRAKE SYSTEM -
DISASSEMBLY SERVICE POINTS
Caution: Brembo disc brake
Take care not to contact the parts or tools to the caliper
because the paint of caliper will be scratched. And if
there is brake fluid on the caliper, wipe out quickly.
AA" PISTON BOOT/PISTON REMOVAL
<Front>
Remove the piston boot by pumping in air slowly from the
brake hose connection. Be sure to use the handle of a plastic
hammer and adjust the height of the two pistons while so
that the pistons protrude evenly.
Caution
Do not remove one piston completely before trying to
remove the other piston, because it will become
impossible to remove the second piston.
<Rear>
Use a piece of wood to protect the caliper body outer side,
and then apply compressed air through the brake hose
connection hole to withdraw the piston and piston boot.
Caution
If air is blown into the caliper body suddenly, the piston
will pop out, causing damage to the caliper body. Be
sure to apply compressed air gradually.
AB" PISTON SEAL REMOVAL
1. Remove the piston seal with finger tip.
Caution
Do not use a flat-tipped screwdriver or other tool to
prevent damage to inner cylinder.
2. Clean piston surface and inner bore with trichloroethylene,
alcohol or the specified brake fluid.
Specified brake fluid: DOT3 or DOT4
REASSEMBLY SERVICE POINT
Caution: Brembo disc brake
Take care not to contact the parts or tools to the caliper
because the paint of caliper will be scratched. And if
there is brake fluid on the caliper, wipe out quickly.
Disc Brake
35A-27