Master Cylinder: Removal

CAUTION:

Do not allow brake fluid to come in contact with the painted surface of the vehicle body. If it does, wash off with water and wipe away completely.
After removing the master cylinder assembly, inspect the seal engagement surface of the seal sub assembly and the vacuum booster assembly.
If the sealing surface of the vacuum booster assembly has a defect such as flaking paint, damage or rust, it may cause negative pressure leakage. Therefore, replace the vacuum booster assembly with a new part.

Disconnect the ground cable from battery. Ref. to NOTE>NOTE>BATTERY .
NOTE: For model with battery sensor, disconnect the ground terminal from battery sensor.
Drain brake fluid from the reservoir tank completely.
Remove the master cylinder assembly.
CAUTION:
- Do not remove the vacuum sensor (e). If removed, replace the vacuum booster assembly with a new part. (Turbo model)
- Do not allows the vacuum sensor (e) to turn. Otherwise the gasket on the mounting location of the vacuum sensor may be damaged. (Turbo model)
1. Disconnect the fluid level sensor connector (a).
2. Disconnect the clutch hose (b). (MT model)
3. Turn the flare nuts while pressing the brake pipes toward the master cylinder assembly side and disconnect the brake pipes (c).
4. Remove the nut (d), and slowly remove the master cylinder assembly from the vacuum booster assembly.
  CAUTION: Before removing the master cylinder assembly, depress the brake pedal several times to make sure that the negative pressure in the vacuum booster assembly is completely removed.
  
  Fig 1: Identifying Master Cylinder Assembly Bolt
  Courtesy of SUBARU OF AMERICA, INC.