Ford F150 Pickup. Instruction — part 433
Fig. 90: Removing Brake Master Cylinder Fluid Control Valve
Courtesy of FORD MOTOR CO.
6. Remove the primary piston assembly (2169).
1. Depress the primary piston and remove the snap ring.
2. Remove and discard the primary piston assembly.
2003 Ford Pickup F150
2003 BRAKES Hydraulic Brake Actuation - F150 Pickup
Fig. 91: Removing Primary Piston Assembly
Courtesy of FORD MOTOR CO.
7. Remove the secondary piston assembly (2A502).
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.
2003 Ford Pickup F150
2003 BRAKES Hydraulic Brake Actuation - F150 Pickup
Fig. 92: Identifying Master Cylinder Ports
Courtesy of FORD MOTOR CO.
NOTE:
If the brake master cylinder bore is damaged, the brake master cylinder
must be installed new.
2003 Ford Pickup F150
2003 BRAKES Hydraulic Brake Actuation - F150 Pickup
Fig. 93: Inspecting Brake Master Cylinder Bore
Courtesy of FORD MOTOR CO.
8. Use isopropyl alcohol to clean and inspect the brake master cylinder bore 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.
WARNING:
Use of any other than approved DOT 3 brake fluid will cause permanent
damage to brake components and will render the brakes inoperative.
WARNING:
Brake fluid contains polyglycol ethers and polyglycols. Avoid contact
with eyes. Wash hands thoroughly after handling. If brake fluid contacts
eyes, flush eyes with running water for 15 minutes. Get medical attention
if irritation persists. If taken internally, drink water and induce vomiting.
Get medical attention immediately.
CAUTION: Brake fluid is harmful to painted or plastic surfaces. If brake fluid is spilled
onto a painted or plastic surface, immediately wash it with water.
2003 Ford Pickup F150
2003 BRAKES Hydraulic Brake Actuation - F150 Pickup
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