Ford Mustang 1999-2005

Manual Bleeding


Clean, high quality brake fluid is essential to the safe and proper operation of the brake system. You should always buy the highest quality brake fluid that is available. If the brake fluid becomes contaminated, drain and flush the system, then refill the master cylinder with new fluid. Never reuse any brake fluid. Any brake fluid that is removed from the system should be discarded. Also, do not allow any brake fluid to come in contact with a painted surface; it will damage the paint.

Brake fluid contains polyglycol ethers and polyglycols. Avoid contact with the eyes and wash your hands thoroughly after handling brake fluid. If you do get brake fluid in your eyes, flush your eyes with clean, running water for 15 minutes. If eye irritation persists, or if you have taken brake fluid internally, IMMEDIATELY seek medical assistance.

On models equipped with an Anti-lock Brake System (ABS), if during brake system service, or because of a fluid leak, the level of fluid in the system ever falls below that of the Hydraulic Control Unit (HCU), refer to the bleeding procedure in the ABS portion of this section. To properly bleed the HCU, an expensive scan tool is necessary; take this into consideration when contemplating brake system service. However, if only the brake pads, calipers, master cylinder, and other non-ABS components are being removed and installed, bleeding the HCU is not necessary and, therefore, the scan tool is not necessary.

Bleed the right rear wheel first then the left rear wheel followed by the right front wheel and the front left wheel last.

  1. Bleed the master cylinder if not already done.
  3. Fill the master cylinder with clean, new DOT 3 brake fluid. Leave a clean shop rag on the master cylinder while bleeding it.
  5. raise and properly support the vehicle.
  7. Position a box-end wrench on the right-rear caliper bleeder valve, then install a clear plastic tube on the bleeder valve nipple. Submerge the other end of the tube in a container partially filled with new, clean brake fluid.

    Click image to see an enlarged view

    Fig. Use a clear plastic tube when bleeding the brakes so that you can see the air bubbles in the fluid

  9. Open the bleeder valve approximately 3 / 4 turn.
  11. Have an assistant sit in the driver-s seat and depress the brake pedal all the way to the floor and hold it there.
  13. Close the bleeder valve, THEN have the helper release the brake pedal.
  15. Check the brake master cylinder level and fill it if necessary; the master cylinder should never be allowed to empty of brake fluid. If it does, the master cylinder and brake system must be rebled.
  17. Repeat Steps 5-8 until no air bubbles appear in the brake fluid emitted from the bleeder tube.
  19. Repeat procedure for left rear wheel followed by the right front wheel and finally the left front wheel.

The brake system is now completely bled. If the brake pedal feels spongy, refer to the ABS bleeding procedure later in this section; air may have become trapped in the Hydraulic Control Unit (HCU).