See Figures 1 and 2
For bleeding of the Anti-lock Brake System (ABS), refer to the ABS bleeding procedure located later in this section.
The purpose of bleeding the brakes is to expel air trapped in the hydraulic system. The system must be bled whenever the pedal feels spongy, indicating that compressible air has entered the system. It must also be bled whenever the system has been opened or repaired. You will need an assistant for this job.
Never reuse brake fluid which has been bled from the brake system. It contains moisture and corrosion products and should, therefore, always be replaced with fresh fluid.
- The sequence for bleeding is right rear wheel, left front wheel, left rear wheel, then right front wheel for Chrysler front wheel drive vehicles without an ABS system. Remove the vacuum from the vacuum booster by applying the brakes several times. Do not run the engine while bleeding the brakes.
- Clean all the bleeder screws. You may want to give each one a shot of penetrating solvent to loosen it; seizure is a common problem with bleeder screws, which then break off, sometimes requiring replacement of the part to which they are attached.
- Fill the master cylinder with DOT 3 brake fluid.
Brake fluid absorbs moisture from the air. Don't leave the master cylinder or the fluid container uncovered any longer than necessary. Be careful handling the fluid-it will damage the vehicle's paint.
Check the level of the fluid often when bleeding, and refill the reservoirs as necessary. Don't let them run dry, or you will have to repeat the process.
- Attach a length of clear vinyl tubing to the bleeder screw on the wheel cylinder. Insert the other end of the tube into a clear, clean jar half filled with brake fluid.
- Have your assistant slowly depress the brake pedal. As this is done, open the bleeder screw until the brake fluid starts to flow through the tube. Then, close the bleeder screw before the brake pedal reaches the end of its travel. After the bleeder valve is fully closed, have your assistant slowly release the pedal. Repeat this process until no air bubbles appear in the expelled fluid.
- Repeat the procedure on the other three brake cylinders/calipers, checking the lever of brake fluid in the master cylinder reservoir often.
After finishing, there should be no feeling of sponginess in the brake pedal. If there is, either there is still air in the line, in which case the process must be repeated, or there is a leak somewhere, which, of course, must be corrected before the car is moved. After all repairs and service work is finished, roadtest the vehicle for proper operation.