Hydraulic System, Bleeding

Hydraulic System, Bleeding

Description covers bleeding of hydraulic system using the brake charger/bleeder unit (VAS 5234).

• A positive pressure of 2 bar is required to bleed the ABS hydraulic unit (N55).

Special tools, testers and auxiliary items required

• Brake Charger/Bleeder Unit (VAS 5234)

• Tool Set for Brake Bleeding (VAS 6564)

• On vehicles with EDL, EDL/ASR or EDL/ASR/ESP, the brake system must be pre-bled when a chamber in the brake fluid reservoir is completely empty (for example brake system leaking). Refer to => [ Hydraulic System, Pre-Bleeding ] Hydraulic System, Pre-Bleeding.

Perform the Following:

Adhere strictly to work sequence when bleeding brake system.

- Connect the (VAS 5234).

- Open the bleeder valves in the prescribed sequence and bleed the brake caliper.

1 - Left front brake caliper

2 - Right front brake caliper

3 - Left rear brake caliper

4 - Right rear brake caliper

• Use suitable bleeder hose. It must fit tightly on the bleeder valve so that no air gets into the brake system.

- With the bleeder bottle hose attached, leave the bleeder valve open long enough that brake fluid exits without bubbles.