Expedition 4WD V8-4.6L SOHC VIN 6 (1997)
4. Remove the brake master cylinder fluid control valve.
5. On speed control equipped vehicles, remove the brake Pressure switch.
Remove Primary Piston Assembly
6. Remove the primary piston assembly.
a. Depress the (A) primary piston and remove the (B) snap ring.
b. Remove and discard the primary piston assembly.
7. Remove the secondary piston assembly.
a. Plug the rear outlet port and, if necessary, plug the brake pressure switch port.
b. Apply compressed air into the front outlet pot and carefully remove the secondary piston assembly and discard.
