Brake Booster: Removal

Remove or disconnect the following parts at engine compartment.
1. Disconnect the connector for brake fluid level indicator.
2. Remove the brake pipes from master cylinder.
3. Remove the master cylinder installing nuts.
4. Disconnect the vacuum hose from brake booster.
Remove the following parts from pedal bracket.
1. Snap pin and clevis pin
2. Four brake booster installing nuts
  
  Fig 1: Removing Parts From Pedal Bracket
  Courtesy of SUBARU OF AMERICA, INC.
Remove the brake booster while shunning brake pipes.

NOTE:

Be careful not to drop the brake booster. The brake booster should be discarded if it has been dropped.
Use special care when handling the operating rod.
If excessive force is applied to the operating rod, sufficient to cause a change in the angle in excess of +/-3°, it may result in damage to the master cylinder.
Use care when placing the brake booster on floor.
Do not change the push rod length. If it has been changed, reset the projected length "L" to standard length.

Standard:

Model with ABS

L = 10.05 mm (0.396 in)

Model with VDC

L = 1.45 mm (0.0571 in)

Fig 2: Identifying Push Rod Length

Courtesy of SUBARU OF AMERICA, INC.

CAUTION: If external force is applied from above when the brake booster is placed in this position, the resin portion as indicated by "P", may be damaged.

Fig 3: Caution For Brake Booster

Courtesy of SUBARU OF AMERICA, INC.