Index Subaru Subaru Impreza 3 / Impreza WRX / Impreza WRX STI - service repair manual 2008-2014 year
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BR-41 Air Bleeding BRAKE 11.Air Bleeding A: PROCEDURE CAUTION: • Do not let brake fluid come into contact with the painted surface of the vehicle body. Wash away with water immediately and wipe off if it is spilled by accident. • Avoid mixing brake fluid of different brands to prevent fluid performance from degrading. • Be careful not to allow dirt or dust to enter the reservoir tank. 1. MASTER CYLINDER NOTE: • When the master cylinder is disassembled or the reservoir tank is empty, bleed the master cylinder. • If bleeding of the master cylinder is not neces- sary, omit the following procedures, and perform bleeding of the brake line. <Ref. to BR-41, BRAKE LINE, PROCEDURE, Air Bleeding.> 1) Fill the reservoir tank of the master cylinder with brake fluid. While bleeding air, keep the reservoir tank filled with brake fluid to prevent entry of air. 2) Disconnect the brake line at primary and sec- ondary sides. 3) Wrap the master cylinder with a plastic bag. 4) Depress the brake pedal slowly and hold it. NOTE: On the model with brake assist mechanism, the fol- lowing phenomena occur when the brake pedal is depressed. However, those are not malfunction but the phenomena that occur when the brake assist mechanism functions properly. • Brake feel is soft when brake pedal is depressed hard or quicker than usual. • ABS operating sound is heard when brake pedal is depressed hard or quicker than usual. 5) Plug the outlet plug with your finger, and then re- lease the brake pedal. 6) Repeat the step 4) and 5) several times. 7) Remove the plastic bag. 8) Install the brake pipe to the master cylinder. 19 N·m (1.94 kgf-m, 14 ft-lb) 9) Bleed air from the brake line. <Ref. to BR-41, BRAKE LINE, PROCEDURE, Air Bleeding.> 2. BRAKE LINE 1) When the master cylinder is disassembled or the reservoir tank is empty, bleed the master cylinder before bleeding the brake line. <Ref. to BR-41, MASTER CYLINDER, PROCEDURE, Air Bleed- 2) Fill the reservoir tank of the master cylinder with brake fluid. While bleeding air, keep the reservoir tank filled with brake fluid to prevent entry of air. 3) Attach one end of the vinyl tube to the air bleeder and the other end to the brake fluid container. 4) Depress the brake pedal several times, and hold it. BR-00090 BR-00091 |