Master Cylinder

WARNING: This page is about a different car, the 2011 Subaru Tribeca. However, it is still accessible from the selected car via links, so may be relevant.

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.

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.
Disconnect the brake line at primary and secondary sides.
Wrap the master cylinder with a plastic bag.
Depress the brake pedal slowly and hold it.

Fig 1: Depressing Brake Pedal Slowly And Hold It
Courtesy of SUBARU OF AMERICA, INC.
Plug the outlet plug with your finger, and then release the brake pedal.

Fig 2: Pluging Outlet Plug With Finger, And Then Release Brake Pedal
Courtesy of SUBARU OF AMERICA, INC.
Repeat the step 4) and 5) several times.
Remove the plastic bag.
Install the brake pipe to the master cylinder.
Tightening torque:

19 N.m (1.9 kgf-m, 14.0 ft-lb)
Bleed air from the brake line. Refer to BRAKE LINE , PROCEDURE, Air Bleeding.