Nissan X-Trail 32. Manual - part 126

 

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Nissan X-Trail 32. Manual - part 126

 

 

BR-98

< REMOVAL AND INSTALLATION >

[RHD]

BRAKE MASTER CYLINDER

• Place the reservoir tank with the chamfered screw hole

(

) facing up.

• Always set copper plates or cloth between vise grips

when fixing the cylinder body to a vise.

• Never overtighten the vise.

4.

Tilt the reservoir tank so that a mounting screw can be fixed.
Assemble with screw. 

Inspection

INFOID:0000000010838584

INSPECTION BEFORE REMOVAL

Check the brake fluid level switch. Refer to 

BRC-159, "Component Inspection"

.

INSPECTION AFTER INSTALLATION

Check the following items and replace if necessary.
• Check the master cylinder for deformation, twist, contact with other parts or looseness of connection.
• Check for fluid leakage from connection. Refer to 

BR-91, "FRONT : Inspection"

.

CAUTION:

If the fluid leakage is present, retighten to the specified torque. Replace parts if necessary.

JPFIA0826ZZ

BRAKE BOOSTER

BR-99

< REMOVAL AND INSTALLATION >

[RHD]

C

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BRAKE BOOSTER

Exploded View

INFOID:0000000010838585

Removal and installation

INFOID:0000000010838586

REMOVAL

CAUTION:

Never spill or splash brake fluid on painted surfaces. Brake fluid may seriously damage paint. Wipe it
off immediately and wash with water if it gets on a painted surface. For brake component parts, never
wash them with water.

1.

Perform inspection before removal. Refer to 

BR-100, "Inspection and Adjustment"

.

2.

Drain brake fluid. Refer to 

BR-77, "Draining"

.

3.

Disconnect vacuum sensor harness connector.

4.

Remove brake master cylinder assembly. Refer to 

BR-95, "Removal and Installation"

5.

Remove vacuum hose from check valve. Refer to 

BR-102, "Removal and Installation"

.

6.

Remove cowl top extension. Refer to 

EXT-25, "Removal and Installation"

.

7.

Remove brake tube between master cylinder assembly and ABS actuator and electric unit (control unit).
Refer to 

BR-88, "FRONT : Exploded View"

.

Master cylinder assembly

Check valve

Vacuum sensor

Brake booster

Gasket

: N·m (kg-m, ft-lb)

JSFIA2240GB

BR-100

< REMOVAL AND INSTALLATION >

[RHD]

BRAKE BOOSTER

8.

Remove snap pin 

 and clevis pin 

9.

Remove nuts on brake booster and brake pedal assembly.

CAUTION:

Hold the brake booster so as to avoid dropping out.

10. Remove brake booster.

CAUTION:

Never deform or bend the brake tubes.

11. Remove check valve from brake booster.

12. Remove vacuum sensor from brake booster.
13. Perform inspection after removal. Refer to 

BR-100, "Inspection and Adjustment"

.

INSTALLATION

CAUTION:

Never spill or splash brake fluid on painted surfaces. Brake fluid may seriously damage paint. Wipe it
off immediately and wash with water if it gets on a painted surface. For brake component parts, never
wash them with water.
Note the following, and install in the reverse order of removal.
• Install check valve 

 and vacuum sensor 

 as shown in figure.

• Be careful not to damage brake booster stud bolt threads. If brake booster is tilted during installation, the

dash panel may damage threads.

• Never deform or bend the brake tubes when installing the brake booster.
• Always use new gasket between the brake booster and the dash panel.
• Replace clevis pin when found damage.
• Never allow foreign matter (e.g.dust) and oil other than brake fluid to enter reservoir tank.
• Perform the air bleeding. Refer to 

BR-78, "Bleeding Brake System"

.

CAUTION:

Never reuse brake fluid to drain.

• Check each item of brake pedal. 

Inspection and Adjustment

INFOID:0000000010838587

INSPECTION BEFORE REMOVAL

Air Tight

CAUTION:

Check the air tight condition when the master cylinder and the brake booster is installed.
1.

Check the air tight use a handy vacuum pump.

JPFIA0019ZZ

A

:

±

15

°

:Vehicle upper side

JSFIA2245ZZ

BRAKE BOOSTER

BR-101

< REMOVAL AND INSTALLATION >

[RHD]

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2.

If the air tight condition cannot be maintained, perform the following operation.

a.

Check the no dirt and dust are present on the brake booster and brake master cylinder mating faces.
Clean it if necessary.

b.

Check the O-ring on the master cylinder. If anything is found, replace the O-ring. Refer to 

BR-95,

"Removal and Installation"

.

c.

Check the air tight condition again. If the condition still cannot be maintained, replace the brake booster.

INSPECTION AFTER REMOVAL

Check Valve Inspection

1.

Check the check valve to use a handy vacuum pump. 

Input Rod Length rod Inspection

1.

Check the input length (A).

2.

Replace the brake booster if the input rod length is not the stan-
dard. 

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 panel decreases.
NOTE:
A slight impact with a small click may be felt on the pedal when the brake pedal is fully depressed. this is nor-
mal phenomenon due to the brake system operation.

Air Tight

1.

Run the engine at idle for 1 minute to apply vacuum to the brake booster, and stop the engine.

2.

Depress the brake pedal several 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 each time.

3.

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 sec-
onds or more.

ADJUSTMENT AFTER INSTALLATION

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

BR-75, "Inspection and

Adjustment"

.

At vacuum of 

66.7 kPa (

500 mmHg, 

19.69 inHg, 

0.067 bar)

: Vacuum should decrease within 3.3 kPa (24.8 mmHg, 
0.98 inHg, 0.033 bar) for 15 seconds.

In the case of connecting to brake 
booster 

: Vacuum should decrease within 3.3 kPa (24.8 mmHg, 
0.98 inHg, 0.033 bar) for 15 seconds at vacuum of 

66.7 kPa (

500 mmHg, 

19.69 inHg, 

0.067 bar).

In the case of connecting to vacuum 
hose 

: Vacuum should not exist.

:Input rod

A

:  Refer  to 

BR-127, "Brake Booster"

JPFIA0238ZZ

 

 

 

 

 

 

 

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