Operation CHARM: Car repair manuals for everyone.

Pressure Bleeding

Air Trapped In Brake System:






NOTE: When bleeding the brake system some air may be trapped in the brake line or valving far upstream, sometimes as much as ten feet from the bleeder screw. Therefore it is absolutely essential to have a fast flow of a large volume of brake fluid when bleeding the brakes to ensure the system is purged of all air bubbles.

Bleeding Brake System:




Caliper Bleeding Screw:






CAUTION: Pressure bleed system using equipment designed for this purpose and vehicle only.

1. Wipe master cylinder caps and top with a clean rag.
2. Connect pressure bleeder following manufacturer's instructions for use of bleeder.
3. Attach a clear plastic hose to the bleeder screw at one wheel and insert the other end of the tube into a clear jar containing fresh brake fluid.
4. Open the bleeder screw at least one full turn.

CAUTION: "Cracking" the bleeder screw often allows only a slow weak fluid flow. This may not be sufficient to remove all air from the system.

5. After a good volume of fluid has been forced through the brake system, an "air free flow" in the plastic hose and clear jar indicates a thorough bleed.
6. Repeat this procedure at all other bleeder screws.
7. Check brake pedal travel. If pedal travel is excessive repeat the procedure.