Brake Booster: Removal

Pull up parking brake lever, and block tires.
Disconnect ground cable from battery.
Remove or disconnect the following parts at the engine compartment:
1. Disconnect the connector for brake fluid level indicator.
2. Remove brake pipes from the master cylinder.
3. Remove the master cylinder installing nuts.
4. Disconnect vacuum hose from the brake booster.
Remove the following parts from the pedal bracket:
1. Remove snap pin and clevis pin.
2. Remove 4 brake booster installing nuts.
  NOTE: Be careful not to drop the brake booster. 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 degrees, it may result in damage to the power piston cylinder.
  
  NOTE: Use care when placing the brake booster on the floor. Do not change the push rod length. If it has been changed, reset the projected length to the standard length. See Fig 2 . See PUSH ROD SPECIFICATIONS table.
Remove the brake booster while shunning brake pipes.

Fig 1: Identifying Possible Resin Damage Cause

Courtesy of SUBARU OF AMERICA, INC.

Fig 2: Measuring Power Booster Push Rod Length

Courtesy of SUBARU OF AMERICA, INC.

BRAKE BOOSTER SPECIFICATIONS