Volkswagen Golf Service & Repair Manual: Subsequent bleeding of hydraulic system

Volkswagen Golf Service & Repair Manual / Brake system (hybrid) / Brakes, hydraulics, regulator, servo / Hydraulic system / Subsequent bleeding of hydraulic system

Note

Carry out subsequent bleeding when:

brake pedal travel is too long or so-called »soft brake pedal«

Subsequent bleeding requires the assistance of a second mechanic.

–	Connect brake filling and bleeding equipment -VAS 5234-.

–	Depress brake pedal firmly and hold.

–	Open bleeder valve on brake caliper.

–	Fully depress brake pedal.

–	Close bleed valve with pedal held down.

–	Release brake pedal slowly.

Note

This bleed sequence must be carried out 5 times per brake caliper.

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.

Note

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!

Subsequent bleeding of hydraulic system

Bleeding hydraulic system following standard procedure

Note Bleeding the hydraulic system using brake filling and bleeding equipment -VAS 5234- is described. A pre-pressure of 2 ...

Pre-bleeding brake system pressure accumulator -VX70-

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