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Home >> Audi >> 2016 >> S5 Prestige, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 632 (Brake System - Hydraulic Components) >> 47 Hydraulic Components >> Hydraulic System >> Hydraulic System, Bleeding >> Hydraulic System, Bleeding Without Brake Charger/Bleeder Unit

Hydraulic System, Bleeding Without Brake Charger/Bleeder Unit

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Procedure 

WARNING:
  • Brake fluid is poisonous. NEVER siphon brake fluid with your mouth!
  • Wash off any brake fluid that comes into contact with the skin with a lot of water.
  • If brake fluid comes in contact with the eyes, wash out the eye(s) and see a doctor.
  • Refer to BRAKE FLUID GENERAL INFORMATION 
NOTE:

Make sure that the brake fluid reservoir is always filled.

-- Remove the cap -1- on each brake caliper bleed screw and connect the container bleed hose to the bleed screw.

Fig 1: Identifying Bleeder Screw Cap
GWWN01-10746Courtesy of AUDI OF AMERICA, LLC

Bleeding sequence

  1. Left front brake caliper
  2. Right front brake caliper
  3. Left rear brake caliper
  4. Right rear brake caliper

-- Build pressure up in brake system by pumping brake pedal.

NOTE:

Slowly depress the brake pedal to prevent the formation of bubbles.

-- As soon as pressure is built up, hold brake pedal in depressed position.

-- Open the bleed screw, with bleeder bottle hose connected, until the pressure is relieved (pedal drops).

-- Hold pedal in completely depressed position and close the bleed screw.

-- Release brake pedal and wait approximately 2 seconds so that brake fluid can flow out of the brake fluid reservoir.

-- Repeat the procedure until the brake fluid flows out clear and free of bubbles.

-- Tighten the bleed screw, remove the bleed hose and connect put the cap on the bleed screw.

-- Repeat the bleeding procedure in the specified sequence for the other brake calipers.

-- Fill the brake fluid reservoir under consideration of brake pad wear up to the max marking and screw on the fuel cap.

-- Start the engine and check the brake pedal travel and pressure.

-- If the pedal travel is too long, check the brake system for leaks and repeat the bleeding procedure, if necessary.

Changing the brake fluid,

WARNING:

There is the risk of an accident.

  • Make sure the brakes are working correctly before driving the vehicle.