Brake Booster: Installation

Check and adjust the operating rod of the brake booster.
Standard: L

144.6 mm (5.69 in)

If it is out of specification, adjust it with the brake booster operating rod.

Fig 1: Identifying Brake Booster Operating Rod Length
Courtesy of SUBARU OF AMERICA, INC.
Mount the brake booster in position.
Connect the operating rod to brake pedal with a clevis pin and snap pin.

Fig 2: Identifying Snap Pin And Clevis Pin To Nut
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Connect the vacuum hose to brake booster.

Fig 3: Identifying Vacuum Hose To Brake Booster
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Mount the master cylinder onto the brake booster.
Connect the brake pipes to the master cylinder.
Connect the connector of the brake fluid level gauge.
Measure the clearance between the threaded end of stop light switch and the stopper.
If it is not within the specification, adjust it by adjusting the position of the stop light switch. <Ref. to ADJUSTMENT , Stop Light Switch. >

CAUTION: Do not rotate the stop light switch.

Stop light switch clearance: A

0.3 mm (0.012 in)

Fig 4: Identifying Stop Light Switch Clearance A
Courtesy of SUBARU OF AMERICA, INC.
Apply grease to the operating rod connecting pin to prevent it from wear.
Bleed air from the brake system. <Ref. to AIR BLEEDING . >
Tightening torque (air bleeder screw):

8 N.m (0.8 kgf-m, 5.8 ft-lb)
Perform a road test to make sure the brakes do not drag.