F 250 2WD Super Duty V10-6.8L VIN S (1999)
6. Remove the secondary piston assembly.
1
Plug the rear outlet port and, if necessary, plug the brake pressure switch port.
2
Apply compressed air into the front outlet port and remove the secondary piston assembly and discard.
7. NOTE: If the brake master cylinder bore is damaged, the brake master cylinder must be replaced.
Clean the brake master cylinder bore using isopropyl alcohol and inspect for damage.
Assembly
1. Use clean High Performance DOT 3 Brake Fluid C6AZ-19542-AB or equivalent DOT 3 fluid meeting Ford specification ESA-M6C25-A to
lubricate the new piston assembly seals.
2. Carefully install the secondary piston assembly.
3. Carefully install the primary piston assembly.
