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Home >> Subaru >> 2009 >> Outback i, Standard >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brake System - Brakes - Mechanical >> Air Bleeding >> Procedure >> Master Cylinder

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 necessary, omit the following procedures, and perform bleeding of the brake line. Refer to BRAKE LINE , PROCEDURE, Air Bleeding.
  1. 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.
  2. Disconnect the brake line at primary and secondary sides.
  3. Wrap the master cylinder with a plastic bag.
  4. Depress the brake pedal slowly and hold it.
    Fig 1: Depressing Brake Pedal
    G05032805Courtesy of SUBARU OF AMERICA, INC.
  5. Plug the outlet plug with your finger, and then release the brake pedal.
    Fig 2: Releasing Brake Pedal
    G05032806Courtesy of SUBARU OF AMERICA, INC.
  6. Repeat steps  4) and  5) several times.
  7. Remove the plastic bag.
  8. Install the brake pipe to the master cylinder.

    Tightening torque: Model with ABS 15 N.m (1.5 kgf-m, 10.8 ft-lb) 

    Model with VDC 19 N.m (1.9 kgf-m, 14.0 ft-lb) 

  9. Bleed air from the brake line. Refer to BRAKE LINE , PROCEDURE, Air Bleeding.
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