Pressure Bleeding

NOTE: Bleeding is necessary if air has entered the hydraulic brake system.

FOUR WHEEL BLEEDING
It may be necessary to bleed the system at all four wheels if a low fluid level allowed air to enter the system, or the brake pipes have been disconnected at the master cylinder or combination valve. if a pipe is disconnected at one wheel, then only bleed that wheel. The time required to bleed the hydraulic system when the master cylinder is removed can be reduced by bleeding the master cylinder before installing it on the vehicle. If the brake pressure modulator valve (BPMV) has been replaced or has air trapped in it, refer to Antilock Brake System, Service and Repair.

NOTE: Brake fluid will damage electrical connections and painted surfaces. Use shop cloths, suitable containers, and fender covers to prevent brake fluid from contacting these areas. Always reseal and wipe off brake fluid containers to prevent spills.

A Diaphragm-Type Pressure Bleeder - must be used. It must have a rubber diaphragm between the air supply and brake fluid to prevent air, moisture, oil, and other contaminants from entering the hydraulic system.

NOTE: Brake fluid will damage electrical connections and painted surfaces. Use shop cloths, suitable containers, and fender covers to prevent brake fluid from, contacting these areas. Always re-seal and wipe off brake fluid containers to prevent spills.

Tools Required:
^ J 29567 Brake Bleeder Adapter
^ J 39177 Combination Valve Pressure Bleeding Tool
^ J 28434 Wheel Cylinder Bleeder Wrench

1. Fill the pressure tank at least 2/3 full of brake fluid.
^ The bleeder must be bled each time fluid is added.
2. Charge the bleeder to 140-170 kPa (20-25 psi).

Combination Valve Pressure Bleeding Tool:

3. Use J 39177 to depress and hold the valve stem on the combination valve.





4. Install the bleeder adapter.
5. If the BPMV is replaced or suspected to have air trapped inside, it must be bled next.
6. Bleed each wheel in the following sequence:
A. Right rear
B. Left rear
C. Right front
D. Left front

7. Connect the hose from the bleeder to the adapter at the master cylinder.
8. Open the tank valve.
9. Attach J 28434 to a bleeder valve.
10. Immerse the opposite end of the hose into a container partially filled with clean brake fluid.
11. Slowly open bleeder valve at least 3/4 of a turn and allow the fluid to flow until no air is seen in the fluid.
12. Tighten the bleeder valve to 7 Nm (62 inch lbs.).
13. Repeat Steps 9 through 12 at all the wheels
14. Check the brake pedal for "sponginess." Repeat the bleeding procedure if this condition is found.
15. Remove J 39177.
16. Disconnect the hose from the bleeder adapter.
17. Remove the bleeder adapter.
18. Fill the master cylinder to the proper level.