Q: How to inspect and replace brake line on Ford F-150?
A: About every six months, inspect the flexible hoses that connect the steel brake lines with the front and rear brake assemblies for cracks, chafing, leaks, blisters, and other damage. Use a light and mirror for a thorough check. If any of the hoses exhibit these defects, replace them with new ones. To replace a front hose, loosen the wheel lug nuts, raise the front of the vehicle, and support it securely on jackstands. Clean the ends of the hose and disconnect it from the metal line by unscrewing the brake line fitting. Remove the clip that retains the fitting to the frame. Disconnect the hose from the caliper and attach the new hose using new sealing washers. Route the line to its original position, making sure it isn't twisted, and attach it to the caliper securely. Check that the suspension or steering components don't make contact with the hose. Bleed the brake system. When replacing metal brake lines, use the correct parts and avoid using copper tubing. Purchase steel brake lines from a dealer parts department or auto parts store. Prefabricated brake lines with flared tube ends and fittings installed are available. Bend the lines to the proper shapes using a tubing bender. Ensure the new line is well supported in the brackets and has enough clearance from moving or hot components. After installation, check the master cylinder fluid level, add fluid if necessary, bleed the brake system, and test the brakes carefully before normal operation.