Hydraulic Brake System Bleeding (Pressure)

Hydraulic Brake System Bleeding

Tools Required
^ J 29532 Diaphragm Pressure Bleeder
^ J 39801-Vibe Pressure Bleeder Adapter

Caution: Do not move the vehicle until a firm brake pedal is obtained. Air in the brake system can cause the loss of brakes with possible personal injury.

Caution: If any brake component is repaired or replaced such that air is allowed to enter the brake system, the entire bleeding procedure MUST be followed. Unapproved or partial bleed procedures can allow air to remain in the brake system. This could result in reduced braking performance and possible personal injury.

Caution: Refer to Brake Fluid Irritant Caution in Cautions and Notices.

Caution: Refer to Brake Fluid Caution in Cautions and Notices.

Notice: Refer to Filling the Master Cylinder Notice in Cautions and Notices.

Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in Cautions and Notices.

Important: Bleed the hydraulic brake system in the following sequence:
1. The master cylinder
2. Right rear bleeder valve
3. Left rear bleeder valve
4. Right front bleeder valve
5. Left front bleeder valve

If air enters the hydraulic brake system due to low brake fluid level, bleed the system at the master cylinder and at the 4 bleeder valves.

If you disconnect a brake pipe from the master cylinder, bleed the system at the master cylinder and at the 4 bleeder valves.

If you disconnect a brake pipe or a lifting between the master cylinder and the wheels bleed the system at the bleeder valve served by the brake pipe or fitting. If you disconnect a brake pipe or brake hose at only 1 wheel, bleed the system at the bleeder valve for that wheel.






Pressure Bleeding

Notice: Pressure bleeding equipment must be the diaphragm type and must have a rubber diaphragm between the air supply and the brake fluid. Air, moisture, oil and other contaminants can damage the hydraulic system.

1. Clean the outside of the brake fluid reservoir and the cap.
2. Remove the reservoir cap.
3. Remove the reservoir diaphragm.
4. Install the J 39801-Vibe, or equivalent, to the reservoir.
5. Add brake fluid to the J 29532, or equivalent, in order to raise the fluid level above the half mark.
6. Connect the J29532, or equivalent, to the J 39801-Vibe, or equivalent.
7. Charge the J 29532, or equivalent, to 175 - 205 kPa (25 - 30 psi).
8. Open the fluid tank valve for the J 29532, or equivalent, in order to allow pressurized brake fluid to enter the hydraulic brake system.
9. Wait 30 seconds.
10. Inspect the hydraulic brake system for external leaks. Refer to Brake System External Leak Inspection.
11. Remove the bleeder valve cap.
12. Install a transparent hose (1) over the end of the bleeder valve (2). Submerge the other end of the hose in a transparent container (5) partially filled with brake fluid.
13. Loosen the bleeder valve in order to purge air from the wheel hydraulic circuit.
14. Close the bleeder valve.
Tighten
Tighten the bleeder valve to 8.3 N.m (73.5 lb in).
15. Repeat this procedure until air (6) is purged from the wheel hydraulic circuit.
16. Install the bleeder valve cap.
17. Repeat this procedure at all bleeder valves that require bleeding.
18. Close the fluid tank valve for the J 29532, or equivalent.
19. Remove the J 29532, or equivalent, from the J 39801-Vibe, or equivalent.
20. Remove the J 39801-Vibe, or equivalent, from the reservoir.
21. Replenish the brake fluid in the master cylinder reservoir to the MAX mark and install the cap. Refer to Master Cylinder Reservoir Filling. Master Cylinder Reservoir Filling
22. Slowly press and release the brake pedal. Observe the feel of the brake pedal.
23. If the brake pedal feels spongy, repeat the bleeding procedure.
24. Inspect the hydraulic brake system for external leaks. Refer to Brake System External Leak Inspection.Brake System External Leak Inspection
25. Turn the ignition switch to the ON position with the engine OFF. Inspect the instrument cluster.
26. If the brake system warning lamp remains illuminated, refer to Symptoms - Hydraulic Brakes. Symptom Related Diagnostic Procedures