Audi Workshop Service and Repair Manuals

Bleeding brake system using brake filling and bleeding equipment -VAS 5234- with adapter -VAS 5234/1- Special tools and workshop equipment required

t  Brake filling and bleeding equipment -VAS 5234-

t  Reservoir -1- t  Brake pipe bleeding wrench -VAS 5519-

t  Tool set for brake bleeding -VAS 6564- Procedure –  Fill up brake fluid reservoir to „MAX“ mark. –  Connect brake filling and bleeding equipment -VAS 5234- with adapter -VAS 5234/1-.

–  Screw adapter -1- onto brake fluid reservoir. –  Set correct pressure on -VAS 5234-. –  Please follow operating instructions for -VAS 5234-.   Note Use suitable bleeder hose. It must fit tightly on the bleeder valve so that no air can enter the brake system.

–  Detach caps -1- at front of vehicle on both sides.

–  Detach caps -1- at rear of vehicle on both sides. –  Connect bleeder bottle hose to bleeder screw. Bleeding sequence 1 -  Front left-side brake caliper 2 -  Front right-side brake caliper 3 -  Rear left-side brake caliper 4 -  Rear right-side brake caliper –  With bleeder hose attached, leave bleeder screw open until the brake fluid which emerges is clear and free from bubbles. –  Press brake pedal 5 times to assist bleeding process. –  Tighten bleeder screw to 10 Nm, detach bleeder hose and attach protective cap to bleeder screw. –  Repeat bleeding procedure in stated sequence at other brake calipers.

–  Fit caps -1- at front of vehicle on both sides.

–  Fit caps -1- at rear of vehicle on both sides. –  Fill up brake fluid reservoir to „MAX“ mark.   Note

To prevent brake fluid from overflowing from the reservoir, the brake fluid level must not be above the „MAX“ mark -1-. –  Start engine and check brake pedal travel and brake pedal pressure. –  In the event of excessive pedal travel, check brake system for leaks and/or repeat bleeding procedure. After bleeding brake system, zero position compensation must be performed for brake pressure sender 1 -G201-. Vehicle diagnosis, testing and information system -VAS 5051 B- or -VAS 5052- under the function → "Guided Fault Finding". Perform test drive after completion of bleeding. At least one ABS control operation must be applied at all four wheels. Changing brake fluid → Booklet808   Caution Make sure that the brakes work properly before the vehicle is driven on the road.