LEMON Manuals: Even more car manuals for everyone
Home >> Subaru >> 2009 >> Tribeca Limited >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brake System - Brakes - Mechanical >> Air Bleeding >> Procedure >> Brake Line

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 MASTER CYLINDER , PROCEDURE, Air Bleeding.
  2. Fill the reservoir tank of the master cylinder with brake fluid.
    NOTE: 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.
    Fig 1: Bleeding From Brake Line
    G05032807Courtesy of SUBARU OF AMERICA, INC.
  4. Depress the brake pedal several times and hold it depressed.
  5. Loosen the air bleeder screw to drain brake fluid. Tighten the air bleeder quickly, and release the brake pedal.
  6. Repeat the steps  4) to  5) until there are no more air bubbles in the vinyl tube.
  7. Repeat the steps from  2) to  6) above to bleed air from each wheel.
    NOTE: Start the bleeding at the farthest wheel cylinder from the master cylinder.
  8. Securely tighten the air bleeder screws.

    Tightening torque: 

    8 N.m (0.8 kgf-m, 5.8 ft-lb) 

  9. Check that there are no brake fluid leaks in the entire system.
  10. Check the pedal stroke.

    Run the engine at idle after warming up the engine, and depress the brake pedal with a force of 500 N (51 kgf, 112 lb). Measure the distance between the brake pedal and steering wheel. Release the pedal, and measure the distance between pedal and steering wheel again.

    Fig 2: Checking Pedal Stroke
    G06343650Courtesy of SUBARU OF AMERICA, INC.

    Specification of pedal stroke: 

    When depressing the pedal with a force of 500N (51 kgf, 112 lbf). 

    115 mm (4.53 in) or less 

  11. If the distance is more than specification, there is a possibility of air being caught in the brake line. Bleed the brake line of all air until the pedal stroke meets the specification.
  12. Operate the hydraulic control unit in the sequence control mode. Ref. to VDC SEQUENCE CONTROL .
  13. Check the pedal stroke again.
  14. If the distance is more than specification, there is a possibility of air being caught in the hydraulic unit. Repeat above steps  2) to  9) until the pedal stroke meets the specification.
  15. Fill the reservoir tank with brake fluid up to the "MAX" level.
  16. Test run the vehicle and ensure that the brakes operate normally.
scientia non olet · About LEMON Manuals