BRAKE > Brake Booster
INSTALLATION
1. Check and adjust the operating rod of the vacuum booster assembly.
(1) Measure the length between the vacuum booster assembly mounting surface and clevis pin hole.
(2) 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)

2. Install each part in the reverse order of removal.
CAUTION:
• Apply grease to the snap pin to prevent the operating rod from wear.
• Replace the clevis pin with new parts, and apply thin coat of NIGTIGHT LYW No. 2 grease to the clevis pin.
• When installing the master cylinder assembly, replace the seal sub assembly with a new part, and install it to the vacuum booster assembly.

(a) | Primary piston | (b) | Seal sub ASSY | (c) | Install the seal sub ASSY to this surface. |
Tightening torque:
Vacuum booster assembly: 18 N·m (1.84 kgf-m, 13.3 ft-lb)
Master cylinder assembly: 13 N·m (1.33 kgf-m, 9.6 ft-lb)
Brake pipe flare nut: 19 N·m (1.94 kgf-m, 14.0 ft-lb)
Operating lock nut: 22 N·m (2.24 kgf-m, 16.2 ft-lb)
Knee airbag module: 7.5 N·m (0.76 kgf-m, 5.5 ft-lb)
3. Install the air conditioner pipe. General Description > COMPONENT">
4. Charge refrigerant. Refrigerant Charging Procedure > PROCEDURE">
5. Bleed air from the brake system. Air Bleeding > PROCEDURE">
6. Perform a road test to make sure the brakes do not drag.
Removal
Brake fluidIdle speed Inspection
MECHANICAL(H4DO) > Idle SpeedINSPECTION1. Before checking the idle speed, check the following item:(1) Check the air cleaner element is free from clogging, ignition timing is correct, spark plugs are in good condition, and hoses are connected properly.(2) Check the malfunction indicator light doe ...
Temporary spare tire
WARNING
Never tow a trailer when the
temporary spare tire is used.
The temporary spare tire is not
designed to sustain the towing
load. Use of the temporary spare
tire when towing can result in
failure of the spare tire and/or
less stability of the vehicle and
may lead to an ac ...
Alarm system setting
The Subaru Ascent allows you to customize the alarm system by switching between
activation and deactivation modes. This flexibility enables you to adapt the vehicle’s
security behavior to your specific needs.
To modify the Subaru Ascent alarm system settings, follow these steps carefully:
1. ...