Infiniti M35/M45 Y50. Manual - part 320

BRAKE MASTER CYLINDER

BR-15

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BR

Disassembly and Assembly

NFS000S5

COMPONENTS

DISASSEMBLY

CAUTION:

●

Master cylinder cannot be disassembled.

●

Remove reservoir tank only when absolutely necessary.

●

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

●

When securing in a vise use copper plates or cloth to protect the flange.

1.

Using a pin punch [commercial service tool: diameter approxi-
mately 4 mm (0.16 in)], remove mounting pin on reservoir tank. 

2.

Remove reservoir tank and grommet from cylinder body.

1.

Reservoir cap

2.

Oil strainer

3.

Reservoir tank

4.

Grommet

5.

Pin

6.

Master cylinder assembly

7.

O-ring

8.

Brake fluid level switch connector

Refer to 

GI-11, "Components"

  and the followings for the symbols in the figure.

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

: Apply brake fluid.

SFIA2955E

BRA0559D

BR-16

BRAKE MASTER CYLINDER

ASSEMBLY

CAUTION:

●

Never 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 the grommet and attach it to the cylinder body.

CAUTION:

Do not reuse grommet.

2.

Install reservoir tank onto the cylinder body.

3.

Secure master cylinder assembly into a vise with a chamfered
pin insert hole on cylinder body facing upward.

4.

Tilt reservoir tank as shown in the figure and insert mounting pin.
Return reservoir tank to a upright position when mounting pin
passes through the pinhole in the cylinder body. Push the
mounting pin to the opposite pinhole of the reservoir tank so that
it is the same conditions as the insertion side.

CAUTION:

●

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

●

Do not reuse mounting pin.

PFIA0505J

BRA0559D

BRAKE BOOSTER

BR-17

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BRAKE BOOSTER

PFP:47200

On-Board Inspection and Service

NFS000S7

OPERATION CHECK

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

AIR TIGHT CHECK

●

Run engine at idle for approximately 1 minute, and stop it after
applying vacuum to booster. Depress brake pedal normally to
change vacuum to atmospheric pressure. Make sure that dis-
tance at intervals of 5 seconds 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.

BRA0037D

SBR365AA

BR-18

BRAKE BOOSTER

Removal and Installation

NFS000S8

COMPONENTS

CAUTION:

●

Be careful not to deform or bend brake tube 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 during installa-
tion, the dash panel may damage the threads.

REMOVAL

1.

Remove cowl top. Refer to 

EI-18, "Removal and Installation"

 .

2.

Remove brake master cylinder. Refer to 

BR-14, "Removal and

Installation"

 . 

3.

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

BR-11, "Hydraulic Circuit"

 .

4.

Remove vacuum hose from brake booster. Refer to 

BR-20,

"Components"

 . 

5.

Remove snap pin and clevis pin from inside vehicle.

6.

Remove nuts on brake booster and brake pedal assembly.

7.

Remove brake booster from dash panel in engine room side.

INSTALLATION

1.

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

2.

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

CAUTION:

Always install gasket between brake booster and dash
panel.

3.

Connect brake pedal with clevis of input rod.

1.

Master cylinder assembly

2.

Brake booster

3.

Lock nut

4.

Brake pedal

5.

Gasket

Refer to 

GI-11, "Components"

 , for the symbols in the figure.

SFIA2956E

SFIA2044E

Length “B”

: 125 mm (4.92 in)

SGIA0060E