Installation [02/2017 - 09/2019]: Procedure

1. Install a new brake master cylinder O-ring to the brake master cylinder sub-assembly.
2. Using a 13 mm deep socket wrench, install the brake master cylinder sub-assembly to the brake booster assembly with a new nut.

   Torque: 20 N*m (204 kgf*cm, 15 ft.*lbf) 

   NOTE:

   • The brake master cylinder sub-assembly requires careful handling. Do not drop or subject the brake master cylinder sub-assembly to any impact. Do not reuse a brake master cylinder sub-assembly that has been dropped.
   • Do not hold the brake master cylinder sub-assembly by the master cylinder piston. Hold the brake master cylinder sub-assembly by its body or its brake master cylinder reservoir assembly when carrying it.
   • Do not pull out the master cylinder piston.
   • Do not strike or pinch the master cylinder piston, or cause any damage to the master cylinder piston by any other means.
   • When installing the brake master cylinder sub-assembly to the brake booster assembly, or when removing the brake master cylinder sub-assembly from the brake booster assembly, make sure that the brake master cylinder sub-assembly is kept horizontal or with its tip facing downward (the master cylinder piston is facing upward) to prevent the master cylinder piston from falling out.
   • Do not allow any foreign matter to contaminate the master cylinder piston. If any foreign matter gets on the master cylinder piston, remove it by using a piece of cloth and then apply an even layer of lithium soap base glycol grease around the circumference (sliding part) of the master cylinder piston.
   • Do not use any other type of grease or fluid.
   • Make sure to release vacuum from the brake booster assembly before removing the brake master cylinder sub-assembly from the brake booster assembly.
3. Using a 13 mm deep socket wrench, install the wire harness bracket to the brake master cylinder sub- assembly with the nut.

   Torque: 20 N*m (204 kgf*cm, 15 ft.*lbf) 

4. Using a union nut wrench, connect the 2 brake lines to the brake master cylinder sub-assembly.

   Specified tightening torque 

   Torque: 19.5 N*m (199 kgf*cm, 14 ft.*lbf) 

   NOTE:

   • Do not kink or damage the brake lines.
   • Do not allow any foreign matter such as dirt or dust to enter the brake lines from the connecting parts.

   HINT: 

   • Calculate the torque wrench reading when changing the fulcrum length of the torque wrench.

     Refer to PRECAUTION [02/2017 - 05/2018] , or refer to PRECAUTION [05/2018 - ]

   • When using a union nut wrench (fulcrum length of 20 mm (0.787 in.)) + torque wrench (fulcrum length of 162 mm (6.38 in.)): 17.4 N*m (177 kgf*cm, 13 ft.*lbf)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Torque Wrench Fulcrum Length

5. Connect the reservoir level switch connector and engage the clamp.

Refer to INSTALLATION [02/2017 - 08/2020]

Refer to PROCEDURE - Step 15 [02/2017 - 10/2017] , or refer to PROCEDURE - Step 15 [10/2017 - 09/2019]

Refer to PROCEDURE - Step 16 [02/2017 - 10/2017] , or refer to PROCEDURE - Step 16 [10/2017 - 09/2019]

Refer to PROCEDURE - Step 17 [02/2017 - 10/2017] , or refer to PROCEDURE - Step 17 [10/2017 - 09/2019]

Refer to PROCEDURE - Step 18 [02/2017 - 10/2017] , or refer to PROCEDURE - Step 18 [10/2017 - 09/2019]

Refer to PROCEDURE - Step 19 [02/2017 - 10/2017] , or refer to PROCEDURE - Step 19 [10/2017 - 09/2019]

Refer to INSTALLATION [02/2017 - 10/2017] , or refer to INSTALLATION [10/2017 - 12/2021]

Refer to BLEEDING [02/2017 - 05/2018] , or refer to BLEEDING [05/2018 - ]