How to Replace the Brake Lines on a F150

The brake lines on your Ford F150's brake system can puncture, or become damaged or corroded, leading to a loss of brake fluid. You need...

The brake lines on your Ford F150's brake system can puncture, or become damaged or corroded, leading to a loss of brake fluid. You need to replace these damaged lines quickly to avoid an impact on vehicle performance. Each brake assembly has its own line and hose that connects it to the rest of the system. When you remove and replace a line, it lets air into the system that you need to bleed out once the installation is complete. Keep in mind that this step requires an assistant.

Instructions

    1

    Raise the F150 truck with a floor jack and support it on jack stands. Remove the wheel for the brake line you are changing.

    2

    Inspect the condition of the flexible hoses connecting the brake line to the caliper. You'll need to replace the hose if it is worn or has deteriorated.

    3

    Disconnect the brake line at the junction block that links it to the flexible brake hose and at the other end where it connects to the rest of the brake system. Use a flare-nut wrench on the fittings.

    4

    Connect the replacement brake line to both fittings. Use a prefabricated brake line that is already bent into the shape needed and is flared with the fittings attached at both ends. Tighten the fittings.

    5

    Open the master cylinder in the engine compartment and top it off with brake fluid. Press the brake pedal several times to remove vacuum from the booster.

    6

    Fill a small bottle or similar container about a quarter full with brake fluid. Loosen the bleeder screw on the brake caliper slightly with a wrench and connect a clear tube to the screw fitting, submerging the tube's other end in the container.

    7

    Open the bleeder screw while a second person holds down on the brake pedal and look for air and fluid to enter the container. Tighten the screw when the fluid begins to slow. Repeat until only fluid comes out the tube.

    8

    Reconnect the wheel and lower the truck.

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