Removal and Installation

BRAKE BOOSTER


Removal and installation


REMOVAL

CAUTION:
- Never remove solenoid valve (with ICC) and vacuum sensor (VK50VE) from brake booster.
- Replace solenoid valve (with ICC), vacuum sensor (VK50VE) and brake booster as a set.
1. Remove master cylinder cover.
2. Remove hoodledge cover. Refer to Exploded View.
3. Separate solenoid valve harness connector (with ICC) and vacuum sensor harness connector (with
VK50VE).
4. Remove brake master cylinder assembly. Refer to Exploded View.

CAUTION:
- Depress the brake pedal several times to release the vacuum pressure from the brake booster.
Then remove the master cylinder assembly.
- Never depress the brake pedal after the master cylinder assembly is removed.
- The piston of the master cylinder assembly is exposed. Never damage it when removing the master cylinder.
- The piston may drop off when pulled out strongly. Never hold the piston. Hold the cylinder body when handling the master cylinder assembly.
5. Remove vacuum hose from brake booster. Refer to Exploded View.
6. Remove instrument lower panel LH. Refer to Exploded View.





7. Remove snap pin (1) and clevis pin (2) from inside vehicle.
8. Remove engine room cover (left side). (VK50VE) Refer to Exploded View.
9. Remove low-pressure flexible hose bracket, place where low-pressure flexible hose and tube will not interfere with work. Refer to Exploded View (VQ35HR), Exploded View (VK50VE).
10. Remove brake tube [between master cylinder and ABS actuator and electric unit (control unit)]. Refer to Exploded View.
11. Separate brake tube [between ABS actuator and electric unit
(control unit) and front brake hose] from ABS actuator and electric unit (control unit). Refer to Exploded View.
12. Remove nuts on brake booster and brake pedal assembly. Refer to Exploded View.

CAUTION:
Hold the brake booster so as to avoid dropping out.
13. Remove brake booster from dash panel in engine room side.

CAUTION:
Never deform or bend the brake tubes.

NOTE:
If removing brake booster is difficult, remove clevis from brake booster.

INSTALLATION
Note the following, and install in the reverse order of removal.
- Be careful not to damage brake booster stud bolt threads. If brake booster is tilted during installation, the dash panel may damage the threads.
- Never deform or bend the brake tubes when installing the brake booster.
- Always use a new gasket between the brake booster and the dash panel.
- Replace the clevis pin if it is damaged. Refer to Procedures.
- Install the brake pedal assembly and brake booster mounting nuts, and tighten it to the specified torque.
- After installation, perform the air bleeding. Refer to Service and Repair.

CAUTION:
Never reuse drained brake fluid.