my Ford F-150 14th Generation (2021-2024) has a hard brake pedal what's the issue

Solution

1. Preparation

• Gather all necessary tools and parts.
• Park the vehicle on a flat surface and engage the parking brake.
• Disconnect the negative battery terminal to ensure safety.

2. Inspect and Replace the Brake Booster

• Tools Required: Socket set, torque wrench, brake cleaner, vacuum gauge.
• Remove the brake booster by:
  1. Disconnecting the brake lines and plugging them to prevent fluid loss.
  2. Removing the mounting nuts and bolts securing the booster to the firewall.
  3. Carefully pulling the booster out from the vehicle.
• Inspect the diaphragm for any damage or wear. If damaged, replace the brake booster with a new one.
• Reinstall by reversing the removal steps, ensuring all bolts are torqued to manufacturer specifications (typically around 15-20 ft-lbs).

3. Check and Replace the Brake Fluid

• Tools Required: Brake fluid, funnel, and a container for old fluid.
• Drain the old brake fluid from the master cylinder reservoir.
• Refill with new brake fluid (DOT 3 or DOT 4, as specified in the owner’s manual).
• Bleed the brake lines to ensure no air is trapped in the system.

4. Final Assembly and Testing

• Reconnect the brake lines securely to the brake booster.
• Reconnect the negative battery terminal.
• Check all connections for leaks.
• Test the brake system by pressing the pedal multiple times to ensure proper function.