Audi Workshop Service and Repair Manuals

Bleeding brake system without brake filling and bleeding equipment Special tools and workshop equipment required

t  Reservoir t  Brake pipe bleeding wrench -VAS 5519-

t  Tool set for brake bleeding -VAS 6564-   Note Make sure brake fluid reservoir is always full. Procedure –  Fill up brake fluid reservoir to „MAX“ mark.

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

–  Detach caps -1- at rear of vehicle on both sides.   Note Use suitable bleeder hose. It must fit tightly on the bleeder valve so that no air can enter the brake system. –  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 –  Build up pressure in brake system by pumping brake pedal.   Note Press brake pedal slowly to avoid formation of bubbles. –  Once pressure has built up, keep brake pedal depressed. –  Open bleeder screw with hose of bleeder bottle attached until pressure has dissipated (pedal sags). –  Keep pedal depressed and close bleeder screw. –  Release brake pedal and wait approx. 2 seconds to allow brake fluid to flow in from brake fluid reservoir. –  Repeat procedure until emerging brake fluid is clear and free from bubbles. –  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 both brake pedal travel and pressure. –  In the event of excessive pedal travel, check brake system for leaks and/or repeat bleeding procedure. Changing brake fluid → Booklet808   Caution Make sure that the brakes work properly before the vehicle is driven on the road.