FixVault
Home › Subaru › 2021 › WRX Base › Repair and Diagnosis › External Pages › Different car › Section 17 (Brake System) › Master Cylinder › Installation › Except For Electric Brake Booster Model

Except For Electric Brake Booster Model

WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.
  1. Apply grease to the cylinder seal assembly, vacuum booster assembly, and master cylinder assembly.
    CAUTION:

    Be careful not to mix up application locations of each grease. 

    1. Apply fluorine grease to the entire outer diameter of a new cylinder seal assembly and the entire contact surface of the vacuum booster assembly with the master cylinder assembly.
      CAUTION:

      Apply fluorine grease to the entire circumference. Areas where application was missed may cause rust. 

      Preparation items: 

      Grease: An item contained in the seal kit (fluorine grease) or equivalent

      G14602242Courtesy of SUBARU OF AMERICA, INC.
    2. Apply silicone grease to the entire circumference on the piston rod of the master cylinder assembly and the entire inner diameter of a new cylinder seal assembly.

      Preparation items: 

      Grease: An item contained in the seal kit (silicone grease) or equivalent

    G14602243Courtesy of SUBARU OF AMERICA, INC.
  2. Install a new cylinder seal assembly to the master cylinder assembly.
    CAUTION:

    Be careful not to install the cylinder seal assembly in the wrong location. 

    G14602244Courtesy of SUBARU OF AMERICA, INC.
  3. Use a new nut to install the master cylinder assembly.

    Tightening torque: 

    13 N.m (1.3 kgf-m, 9.6 ft-lb)

  4. Install the pipe assembly front ABS.
    CAUTION:

    Be careful not to make scratches or other damage to the inside surface of the brake pipe flare. 

    1. Turn and tighten the flare nut (b) by hand while pushing the pipe assembly front ABS (a) away from yourself.
    2. Tighten the flare nut (b) using a flare nut wrench and a crowfoot wrench.
    NOTE:

    If the work can be performed with the front and back sides reversed, it is also possible to use a 6-point crowfoot wrench. 

    G13199763Courtesy of SUBARU OF AMERICA, INC.

    Tightening torque: 

    Calculation formula

    T = 19 N.m (1.9 kgf-m, 14.0 ft-lb) x L1/(L1 + L2)

    T: Reading of the torque wrench

    L1: Effective length of the torque wrench

    L2: Effective length of the crowfoot wrench

    NOTE:

    If the effective length of the tool used is unknown, consult the manufacturer of the tool. 

    G14602246Courtesy of SUBARU OF AMERICA, INC.
  5. Connect the level indicator connector.
  6. Install the reservoir hose assembly.
  7. Install the engine control module (ECM). Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>ENGINE CONTROL MODULE (ECM)>INSTALLATION .
  8. Bleed air from the brake system and clutch system. Ref. to BRAKE>AIR BLEEDING>PROCEDURE .
  9. Connect the ground terminal to battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
About FixVault