Infiniti G35 (V35) Sedan. Manual - part 224

BRAKE BOOSTER

BR-33

< ON-VEHICLE REPAIR >

C

D

E

G

H

I

J

K

L

M

A

B

BR

N

O

P

CAUTION:

• Be careful not to damage brake booster stud bolt threads. If brake booster is tilted during installa-

tion, 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 

BR-20, "Inspection and Adjustment"

.

• After installation, perform the air bleeding. Refer to 

BR-12, "Bleeding Brake System"

.

CAUTION:

Never reuse drained brake fluid.

2WD : Inspection and Adjustment

INFOID:0000000000958440

INSPECTION AFTER REMOVAL

Input Rod Length Inspection

1.

Loosen the lock nut (1) and adjust the input rod (2) to the speci-
fied length (B).

2.

Tighten the lock nut to the specified torque.

INSPECTION AFTER INSTALLATION

Operation

Depress the brake pedal several times at 5-second intervals with the
engine stopped. Start the engine with the brake pedal fully
depressed. Check that the clearance between brake pedal and dash
lower pane decreases.
NOTE:
A slight impact with a small click may be felt on the pedal when the
brake pedal is fully depressed. This is a normal phenomenon due to
the brake system operation.

Air Tight

• Run the engine at idle for 1 minute to apply vacuum to the brake

booster, and stop the engine. Then depress the brake pedal sev-
eral times at 5-second intervals until the accumulated vacuum is
released to atmospheric pressure. Check that the clearance
between brake pedal and dash lower panel gradually increases
(A

→

B

→

C) each time the brake pedal is depressed when perform-

ing this operation.

Standard

Input rod length (B)

: Refer to 

BR-62, "Brake 

Booster"

JPFIA0020ZZ

BRA0037D

JPFIA0043ZZ

BR-34

< ON-VEHICLE REPAIR >

BRAKE BOOSTER

• Depress the brake pedal with the engine running. Then stop the

engine while holding down the brake pedal. Check that the brake
pedal stroke does not change after holding down the brake pedal
for 30 seconds or more.
NOTE:
A slight impact with a small click may be felt on the pedal when the
brake pedal is fully depressed. This is a normal phenomenon due
to the brake system operation.

ADJUSTMENT AFTER INSTALLTION

Perform the brake pedal adjustment after installing the brake pedal assembly. Refer to 

BR-7, "Inspection and

Adjustment"

.

AWD

AWD : Exploded View

INFOID:0000000000958441

AWD : Removal and installation

INFOID:0000000000958442

REMOVAL

1.

Remove master cylinder cover.

2.

Remove cowl top. Refer to 

EXT-18, "Removal and Installation"

.

3.

Remove brake master cylinder assembly. Refer to 

BR-29, "AWD : Removal and Installation"

.

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.

4.

Remove vacuum hose from brake booster. Refer to 

BR-37, "Removal and Installation"

.

JPFIA0044ZZ

1.

Master cylinder assembly

2.

Brake booster

3.

Lock nut

4.

Gasket

5.

Clevis

Refer to 

GI-4, "Components"

 for symbols in the figure.

JPFIA0070GB

BRAKE BOOSTER

BR-35

< ON-VEHICLE REPAIR >

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5.

Remove snap pin (1) and clevis pin (2) from inside vehicle.

6.

Remove nuts on brake booster and brake pedal assembly. Refer
to 

BR-19, "Exploded View"

.

7.

Remove brake booster from dash panel in engine room side.

CAUTION:

Never deform or bend the brake tubes.

INSTALLATION

Note the following, and installation in the reverse order of removal.

CAUTION:

• Be careful not to damage brake booster stud bolt threads. If brake booster is tilted during installa-

tion, 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 

BR-20, "Inspection and Adjustment"

.

• After installation, perform the air bleeding. Refer to 

BR-12, "Bleeding Brake System"

.

CAUTION:

Never reuse drained brake fluid.

AWD : Inspection and Adjustment

INFOID:0000000000958443

INSPECTION AFTER REMOVAL

Input Rod Length Inspection

1.

Loosen the lock nut (1) and adjust the input rod (2) to the speci-
fied length (B).

2.

Tighten the lock nut to the specified torque.

INSPECTION AFTER INSTALLATION

Operation

Depress the brake pedal several times at 5-second intervals with the
engine stopped. Start the engine with the brake pedal fully
depressed. Check that the clearance between brake pedal and dash
lower pane decreases.
NOTE:
A slight impact with a small click may be felt on the pedal when the
brake pedal is fully depressed. This is a normal phenomenon due to
the brake system operation.

Air Tight

JPFIA0019ZZ

Standard

Input rod length (B)

: Refer to 

BR-62, "Brake 

Booster"

JPFIA0020ZZ

BRA0037D

BR-36

< ON-VEHICLE REPAIR >

BRAKE BOOSTER

• Run the engine at idle for 1 minute to apply vacuum to the brake

booster, and stop the engine. Then depress the brake pedal sev-
eral times at 5-second intervals until the accumulated vacuum is
released to atmospheric pressure. Check that the clearance
between brake pedal and dash lower panel gradually increases
(A

→

B

→

C) each time the brake pedal is depressed when perform-

ing this operation.

• Depress the brake pedal with the engine running. Then stop the

engine while holding down the brake pedal. Check that the brake
pedal stroke does not change after holding down the brake pedal
for 30 seconds or more.
NOTE:
A slight impact with a small click may be felt on the pedal when the
brake pedal is fully depressed. This is a normal phenomenon due
to the brake system operation.

ADJUSTMENT AFTER INSTALLTION

Perform the brake pedal adjustment after installing the brake pedal assembly. Refer to 

BR-7, "Inspection and

Adjustment"

.

JPFIA0043ZZ

JPFIA0044ZZ