1996 Aerostar Brake Bleeding - Manual Bleeding

1996 Ford Truck Aerostar AWD V6-245 4.0L

Copyright © 2008, ALLDATA

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Brake Bleeding: Service and Repair Manual Bleeding Procedure WARNING: Brake fluid contains polyglycol ethers and polyglycols. Avoid contact with eyes. Wash hands thoroughly after handling. If brake fluid contacts eyes, flush 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: Do not allow the reservoir to run dry during the bleeding operation. Keep the recessed conventional master cylinder reservoir filled with the specified brake fluid. Never reuse the fluid that has been drained from the hydraulic system. NOTE: Bleed the longest line first. 1. on the conventional brake master cylinder, loosen the master cylinder-to-hydraulic line fittings. 2. Wrap a shop cloth around the tubing below the fitting to absorb escaping brake fluid. 3. Push the brake pedal down slowly to the floor of the cab. This will force air trapped in the conventional brake master cylinder to escape at the fitting. 4. Hold the brake pedal down and tighten the fitting. Release the brake pedal. NOTE: Do not release the brake pedal until the fitting is tightened or air will re-enter the conventional brake master cylinder. 5. Repeat this procedure until air ceases to escape at the fitting and the brake pedal is firm. 6. Place a box wrench on the bleeder fitting on the rear anti-lock brake system valve. Attach a rubber drain tube to the bleeder fitting making sure the end of the tube fits snugly around the bleeder fitting.

Wheel Cylinder Bleeding 7. Submerge the free end of the tube in a container partially filled with clean brake fluid. Loosen the bleeder fitting approximately three-quarters of a turn. 8. Slowly push the brake pedal all the way down. Close the bleeder fitting and return the brake pedal to the fully released position. Repeat this operation until all the air bubbles no longer appear at the submerged end of the bleeder tube. 9. When the fluid is completely free of air bubbles, close the bleeder fitting and remove the bleeder tube. 10. Repeat this procedure at the left rear brake wheel cylinder on the opposite side. Refill the brake master cylinder reservoir after each wheel cylinder is bled. 11. When the bleeding operation is complete, fill the brake master cylinder to the maximum level line on the brake master cylinder reservoir. Clean and install the brake master cylinder filler cap and diaphragm back on brake master cylinder reservoir.