Hydraulic Brake System Bleeding (Pressure Bleeding)

Use a diaphragm-type pressure bleeder. The pressure bleeder must have a rubber diaphragm between the air supply and the brake fluid. This prevents air, moisture, oil and other contaminants from entering the brake hydraulic system.

^ Tools Required
- J 41618 Brake Bleeder Adapter Set
- J 39177 Combination Valve Pressure Bleeding Tool
- J 29567 Brake Pressure Bleeder

Notice: 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.

1. Fill the pressure tank at least 2/3 full of brake fluid.
2. Bleed the J 29567 each time fluid is added.
3. Charge the J 29567 with 140 - 170 kPa (20 - 25 psi) air pressure.
4. Use the J 39177 in order to depress and hold the valve stem on the combination valve on the Brake Pressure Modulator Valve (BPMV) assembly.
5. Install the J 29567 and the J 41618.
6. If the BPMV of the 4WAL system is replaced, or if you suspect that air is trapped inside, bleed the BPMV first.
7. Connect the hose from the bleeder to the adapter at the master cylinder.
8. Open the tank valve.
9. Attach a hose to the bleeder valve at the right rear wheel.
10. Immerse the opposite end of the hose into a container partially filled with clean brake fluid.
11. Open the bleeder valve at least 1/2 to 1 turn.
Allow the fluid to flow until you see no air in the fluid.
12. Tighten the bleeder valve.
^ Tighten the wheel cylinder or caliper bleeder valve to 7 Nm (62 inch lbs.).

13. Bleed each wheel cylinder in the following sequence:
13.1 Right rear wheel cylinder.
13.2 Left rear wheel cylinder.
13.3 Right front wheel caliper.
13.4 Left front wheel caliper.
14. Remove the J 39177.
15. Use a Scan Tool to perform four 4WAL function tests.
16. Re-bleed each wheel circuit.
17. Check the brake pedal for sponginess and check the brake warning lamp for an indication of unbalanced pressure. Repeat the bleeding procedure in order to correct either of these conditions.
18. Turn off the valve on the bleeder.
19. Disconnect the hose from the J 41618.
20. Remove the J 41618.
21. Fill the master cylinder to the proper level.
22. Check the feel of the brake pedal.