Infiniti M35/M45 Y50. Manual - part 321

BRAKE BOOSTER

BR-19

C

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BR

4.

Install brake pedal bracket mounting nuts and bolt, and tighten them to the specified torque. Refer to 

BR-

7, "COMPONENTS"

 .

5.

Install vacuum hose into brake booster. Refer to 

BR-21, "Removal and Installation"

 .

6.

Install master cylinder to booster assembly. Refer to 

BR-14, "Removal and Installation"

 . 

7.

Adjust the brake pedal height and the play of the brake pedal. Refer to 

BR-6, "ADJUSTMENT"

 . 

8.

Tighten lock nut of input rod to the specified torque. Refer to 

BR-18, "COMPONENTS"

 .

9.

Connect front left brake tube to ABS actuator and electric unit (control unit). Refer to 

BR-11, "Hydraulic

Circuit"

 .

10. Install cowl top. Refer to 

EI-18, "Removal and Installation"

 .

11. Refill new brake fluid and bleed air. Refer to 

BR-10, "Bleeding Brake System"

 . 

BR-20

VACUUM LINES

VACUUM LINES

PFP:41920

Components

NFS000S9

VK45DE ENGINE MODELS

VQ35DE ENGINE MODELS 

SFIA2957E

1.

Clamp

2.

Vacuum hose

3.

Engine direction indicator stamp
(Built in check valve)

4.

Clip

5.

Vacuum piping

6.

Grommet (Vacuum hose side)

7.

Grommet (Cowl top assy side)

8.

For intake manifold

9.

For brake booster

SFIA2958E

1.

Clamp

2.

Vacuum hose

3.

Engine direction indicator stamp
(Built in check valve)

4.

Clip

5.

Vacuum piping

6.

Grommet (Vacuum hose side)

7.

Grommet (Cowl top assy side)

8.

For intake manifold

9.

For brake booster

VACUUM LINES

BR-21

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Removal and Installation

NFS000SA

CAUTION:

●

Because vacuum hose contains a check valve, it must be
installed in the correct position. Refer to the stamp to con-
firm correct installation. Brake booster will not operate nor-
mally if the hose is installed in the wrong direction. 

●

Insert vacuum hose at least 24 mm (0.94 in).

●

Do not use lubricating oil during assembly.

Inspection

NFS000SB

VISUAL INSPECTION

Check for correct assembly, damage and deterioration.

CHECK VALVE INSPECTION
Airtightness Inspection

Use a handy vacuum pump to check.

●

Replace vacuum hose assembly if vacuum hose and check
valve are malfunctioning.

SBR225B

When connected to the booster side (1):

Vacuum should decrease within 1.3 kPa (10 
mmHg, 0.39 inHg) for 15 seconds under a vacuum 
of 

−

66.7 kPa (

−

500 mmHg, 

−

19.69 inHg).

When connected to the engine side (2):              

Vacuum should not exist.

SFIA0210E

BR-22

FRONT DISC BRAKE

FRONT DISC BRAKE

PFP:41000

On-Board Inspection

NFS000SC

PAD WEAR INSPECTION

●

Check pad thickness from an inspection hole on cylinder body.
Check using a scale if necessary.

Components

NFS000SD

WARNING:

Clean dust on caliper and brake pad with a vacuum dust collector to minimize the hazard of air borne
particles or other materials.

CAUTION:

●

While removing cylinder body, do not depress brake pedal because piston will pop out. 

Standard thickness

: 11.0 mm (0.433 in)

Repair limit thickness

: 2.0 mm (0.079 in)

MAA0439D

1.

Union bolt

2.

Copper washer

3.

Brake hose

4.

Cap

5.

Bleed valve

6.

Sliding pin bolt

7.

Piston seal

8.

Piston

9.

Piston boot

10.

Cylinder body

11.

Sliding pin

12.

Torque member mounting bolt

13.

Washer

14.

Sliding pin boot

15.

Bushing

16.

Torque member

17.

Inner shim cover

18.

Inner shim

19.

Inner pad

20.

Pad retainer

21.

Pad wear sensor

22.

Outer pad

23.

Outer shim

24.

Outer shim cover

Refer to 

GI-11, "Components"

  and the followings for the symbols in the figure.

1: Apply rubber grease.

2: Apply PBC (Poly Butyl Cuprysil) grease or silicone-based grease.

3: Apply polyglycol ether based lubricant.

: Apply brake fluid.

PFIA0820E