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Testing for leaks > < Bleeding hydraulic system following standard procedure

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Subsequent bleeding of hydraulic system
Subsequent bleeding of hydraulic system
Bleeding the brake system is described using brake filling and bleeding equipment -VAS 5234-.
A pre-pressure of 2 bar is required for bleeding the hydraulic unit.
Special tools and workshop equipment required
   
t  Brake filling and bleeding equipment -VAS 5234-
  W00-1101
t  Tool set for brake bleeding -VAS 6564-
Carry out subsequent bleeding when:
t  brake pedal travel is too long or so-called »soft brake pedal«
Subsequent bleeding requires the assistance of a second mechanic.
–  Depress brake pedal firmly and hold.
–  Open bleeder valve on wheel brake cylinder/brake caliper.
–  Fully depress brake pedal.
–  Close bleeder valve with pedal held down.
–  Release brake pedal slowly.
This bleed sequence must be carried out 5 times per brake caliper.
Bleeding sequence:
1 - Rear right wheel brake cylinder
2 - Rear left wheel brake cylinder
3 - Front right brake caliper
4 - Front left brake caliper
A road test must be carried out after the brakes have been bled. When doing this an ABS regulation must be performed at least once!
  W00-10802

Testing for leaks > < Bleeding hydraulic system following standard procedure