Infiniti G35 (V35). Manual - part 230

BRAKE MASTER CYLINDER

BR-15

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Components

NFS000IA

Disassembly and Assembly

NFS0005J

DISASSEMBLY

CAUTION:

●

Master cylinder cannot be disassembled.

●

Remove the reservoir tank only when absolutely necessary.

1.

Clamp flange of cylinder body in vise as shown in the figure.

CAUTION:

●

Using copper plate or cloth to cover flange for securing
vise.

●

When securing master cylinder assembly in a vise, be
sure not to over tighten.

●

Be sure to fix the flange part with the brake tube installa-
tion side of cylinder body brake tube up.

2.

Using a pin punch [commercial service tool: diameter approx. 4
mm (0.16 in)], remove pin form reservoir tank.

3.

Remove master cylinder assembly from vise.

4.

Remove reservoir tank and grommet from cylinder body.

1.

Reservoir tank

2.

Reservoir cap

3.

Oil filter

4.

Grommet

5.

Brake fluid level switch connector

6.

Pin

7.

Cylinder body

8.

O-ring

SFIA2692E

BRA0558D

BRA0559D

BR-16

BRAKE MASTER CYLINDER

ASSEMBLY

CAUTION:

●

Do not use mineral oils such as kerosene, gasoline during the cleaning and assembly process.

●

Do not drop parts. If a part is dropped, do not use it.

1.

Apply brake fluid to a grommet, and place it into master cylinder to install.

CAUTION:

Do not reuse grommet.

2.

Install reservoir tank to master cylinder.

CAUTION:

●

Do not reuse reservoir tank and reservoir tank mounting
pin.

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Pay attention to the orientation of reservoir tank.

3.

Secure flange of cylinder body as shown in the figure.

CAUTION:

●

Using copper plate or cloth to cover flange for securing
in a vise.

●

When securing master cylinder assembly in a vise, be
sure not to over tighten.

●

Be sure to fix the flange part with the brake tube installa-
tion side of cylinder body up.

4.

Using a pin punch [commercial service tool: diameter approx. 4
mm (0.16 in)], insert the reservoir tank mounting pin into the pin
hole so that the attachment side and the opposite side are iden-
tical.

BRA0568D

BRA0558D

BRA0559D

BRAKE BOOSTER

BR-17

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BRAKE BOOSTER

PFP:47200

On-Vehicle Inspection

NFS0005K

OPERATING CHECK

With the engine stopped, change the vacuum to the atmospheric
pressure by depressing brake pedal several times. Then with brake
pedal fully depressed, start engine and when the vacuum pressure
reaches the standard, make sure that the clearance between brake
pedal and floor panel decreases.

CAUTION:

Depressing pedal interval is approximately 5 seconds.

AIRTIGHT CHECK

●

Run engine at idle for approximately 1 minute, and stop it after
applying vacuum to booster. Depress brake pedal normally to
change the vacuum to the atmospheric pressure. Make sure
that distance between brake pedal and floor panel gradually
increases.

●

Depress brake pedal while engine is running, and stop engine
with pedal depressed. The pedal stroke should not change after
holding pedal down for 30 seconds.

CAUTION:

Depressing pedal interval is approximately 5 seconds.

Components

NFS000IB

BRA0037D

SBR365AA

1.

Reservoir tank

2.

Cylinder body

3.

Gasket

4.

Brake pedal

5.

Lock nut

6.

Brake booster

SFIA2830E

BR-18

BRAKE BOOSTER

Removal and Installation

NFS0005L

REMOVAL

CAUTION:

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Be careful not to splash brake fluid on painted areas such as body. It may cause paint damage. If
brake fluid is splashed on painted surfaces of body, wipe it off with cloth immediately and then,
wash it away with water. 

●

Be careful not to deform or bend brake piping while removing and installing brake booster.

●

Replace clevis pin if it is damaged.

●

Be careful not to damage brake booster stud bolt threads. If brake booster is tilted or inclined dur-
ing installation, dash panel may damage the threads.

●

Be sure to install check valve in the correct orientation. 

1.

Remove vacuum hose from brake booster.

2.

Remove master cylinder. Refer to 

BR-14, "Removal and Installation"

 .

3.

Remove snap pin and clevis pin on the clevis of the brake booster, and remove input rod from brake
pedal. Refer to 

BR-7, "Components"

 .

4.

Remove brake pedal mounting nuts on brake pedal assembly.

5.

Remove brake booster from dash panel.

INSPECTION AFTER REMOVAL
Output Rod Length Inspection

1.

Using a handy vacuum pump, apply a vacuum of –66.7 kPa
 (–500 mmHg, –19.69 inHg) to brake booster.

2.

Check output rod length.

INSTALLATION

1.

Loosen lock nut to adjust input rod length so that the length “B”
(shown in the figure) satisfies the specified value.

2.

After adjusting length “B”, temporarily tighten lock nut to install
brake booster assembly to dash panel. At this time, make sure
to install a gasket between brake booster and dash panel.

3.

Connect brake pedal to clevis of input rod with the clevis pin and
snap pin.

4.

Install brake pedal assembly mounting nuts and tighten them to
the specified torque. Refer to 

BR-17, "Components"

 .

5.

Install vacuum hose into brake booster. Refer to 

BR-19, "Removal and Installation"

 . 

6.

Install master cylinder to brake booster. Refer to 

BR-14, "Removal and Installation"

 .

7.

Adjust the height and play of brake pedal. Refer to 

BR-6, "ADJUSTMENT"

 .

8.

Tighten lock nut of input rod to the specified torque.

9.

Bleed air. Refer to 

BR-10, "Bleeding Brake System"

 .

Standard dimension when vacuuming
 –66.7 kPa (–500 mmHg, –19.69 inHg)

: 30.5 mm (1.201 in)

SFIA2146E

Length “B”

: 125 mm (4.92 in)

SGIA0060E