Brake system (hybrid)

Bleeding hydraulic system following standard procedure

~1min read
Note Bleeding the hydraulic system using brake filling and bleeding equipment -VAS 5234- is described.

A pre-pressure of 2 bar is required for bleeding the ABS hydraulic unit -N55-.

Special tools and workshop equipment required

Brake filling and bleeding equipment -VAS 5234-

Bleeding hydraulic system following standard procedure

Tool set for brake bleeding -VAS 6564-

Carry out the following work:

  • On vehicles with 15-inch rims, remove rear wheels.
Note

Adhere strictly to work sequence when bleeding brake system.

  • Connect brake filling and bleeding equipment -VAS 5234-.
  • Open bleeder valves in specified order and bleed brake calipers.
1 - Front left brake caliper
2 - Front right brake caliper
3 - Rear left wheel brake cylinder
4 - Rear right wheel brake cylinder
5 - Brake system pressure accumulator -VX70-, LHD vehicles
Use suitable bleeder hose. It must sit tightly on bleeder valve so that no air can enter brake system:
  • Leave bleeder valve of each brake caliper open with bleeder hose fitted until brake fluid discharges free of air bubbles.
Bleeding hydraulic system following standard procedure

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