Brake Booster: Installation

CAUTION: Before handling the airbag system components, refer to "CAUTION" of "General Description" in "AIRBAG SYSTEM". Ref. to AIRBAG SYSTEM>GENERAL DESCRIPTION>CAUTION .

Check and adjust the operating rod of the vacuum booster assembly.

Measure the length between the vacuum booster assembly mounting surface and clevis pin hole.

If it is not within the specification, loosen the lock nut, rotate the vacuum booster assembly operating rod to adjust the rod length.

Specification L:

136.3 mm (5.37 in)

Courtesy of SUBARU OF AMERICA, INC.

Tighten the lock nut.

NOTE: Check the brake pedal height. When adjusting, also adjust the stop light switch assembly.

Tightening torque:

18 N-m (1.8 kgf-m, 13.3 ft-lb)

Install the vacuum booster assembly.
CAUTION:
- Replace the clevis pin with a new part, and apply a thin coat of grease to the clevis pin.
Preparation items:

Grease: Shell Gadus S2 V220 or equivalent
- When installing the master cylinder assembly, replace the cylinder seal assembly with a new part, and install it to the vacuum booster assembly.
Tightening torque:

18 N-m (1.8 kgf-m, 13.3 ft-lb)
Install the column assembly steering. Ref. to POWER ASSISTED SYSTEM (POWER STEERING)>STEERING COLUMN>INSTALLATION .
Install the universal joint. Ref. to POWER ASSISTED SYSTEM (POWER STEERING)>UNIVERSAL JOINT>INSTALLATION .
Install the knee airbag module. Ref. to AIRBAG SYSTEM>KNEE AIRBAG MODULE>INSTALLATION .
Install the cover LWR driver.
Install the pipe assembly front ABS.
Tightening torque:

19 N-m (1.9 kgf-m, 14.0 ft-lb)
Install the master cylinder assembly. Ref. to BRAKE>MASTER CYLINDER>INSTALLATION .
Install the engine control module (ECM).
- H4DO model: Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>ENGINE CONTROL MODULE (ECM)>INSTALLATION .
- H4DOTC model: Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>ENGINE CONTROL MODULE (ECM)>INSTALLATION .
Install the vacuum hose and pipe. Ref. to BRAKE VACUUM HOSE AND PIPE .
Bleed air from the brake system. Ref. to BRAKE>AIR BLEEDING>PROCEDURE .
Connect the ground terminal to battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
Perform a road test to make sure the brakes do not drag.