Nissan X-Trail 32. Manual - part 110

BR-34

< REMOVAL AND INSTALLATION >

[LHD]

BRAKE MASTER CYLINDER

• The piston 

 of the master cylinder assembly is exposed. Never

damage it when handling the master cylinder.

• Check that no dirt and dust are present on the piston before instal-

lation. Clean it with new brake fluid if necessary.

• The piston may drop off when pulled strongly. Never hold the pis-

ton. Hold the cylinder body when handling the master cylinder
assembly.

• Never deform or bend the brake tubes.

• Temporarily tighten the brake tube flare nut to the master cylinder

assembly by hand. Then tighten it to the specified torque with a
flare nut torque wrench (A). Refer to 

BR-32, "Exploded View"

.

• Perform the air bleeding. Refer to 

BR-14, "Bleeding Brake Sys-

tem"

.

• Perform inspection after installation. Refer to 

BR-35, "Inspection"

.

Disassembly and Assembly

INFOID:0000000010838520

DISASSEMBLY

CAUTION:

• Never disassemble the cylinder body.
• Remove the reservoir tank only when necessary.
• Never drop parts to remove. Replace new parts when dropping.

1.

Fix the master cylinder assembly to a vise.

CAUTION:

• Always set copper plates or cloth between vise grips when fixing the cylinder body to a vise.
• Never overtighten the vise.

2.

Remove the reservoir tank mounting screw.

3.

Remove the reservoir tank and grommet from the cylinder body.

ASSEMBLY

CAUTION:

• Never use mineral oils such as kerosene or gasoline and rubber grease during the cleaning and

assembly process.

• Never allow foreign matter (e.g. dust) and oils other than brake fluid to enter the reservoir tank.
• Never drop when installing. The parts must not be reused if they are dropped.

1.

Apply new brake fluid to the grommet and install it to the cylinder body.

CAUTION:

Never reuse grommets.

2.

Install the reservoir tank to the cylinder body.

3.

Fix the cylinder body to a vise.

CAUTION:

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BRAKE MASTER CYLINDER

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< REMOVAL AND INSTALLATION >

[LHD]

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• 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:0000000010838521

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-27, "FRONT : Inspection"

.

CAUTION:

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

JSFIA2383ZZ

BR-36

< REMOVAL AND INSTALLATION >

[LHD]

BRAKE BOOSTER

BRAKE BOOSTER

Exploded View

INFOID:0000000010838522

Removal and installation

INFOID:0000000010838523

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-38, "Inspection and Adjustment"

.

2.

Drain brake fluid. Refer to 

BR-13, "Draining"

.

3.

Remove brake master cylinder assembly. Refer to 

BR-32, "Removal and Installation"

. 

4.

Remove vacuum hose from check valve. 
• For MR20DD, refer to 

BR-40, "MR20DD : Removal and Installation"

.

• For QR25DE, refer to 

BR-41, "QR25DE : Removal and Installation"

.

• For R9M, refer to 

BR-42, "R9M : Removal and Installation"

.

5.

Remove cowl top extension. Refer to 

EXT-25, "Removal and Installation"

.

6.

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

BR-24, "FRONT : Exploded View"

.

Brake booster

Check valve

Master cylinder assembly

Vacuum sensor

Gasket

: N·m (kg-m, ft-lb)

JSFIA2541GB

BRAKE BOOSTER

BR-37

< REMOVAL AND INSTALLATION >

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7.

Remove snap pin 

 and clevis pin 

. 

8.

Remove nuts on brake booster and brake pedal assembly.

CAUTION:

Hold the brake booster so as to avoid dropping out.

9.

Remove brake booster.

CAUTION:

Never deform or bend the brake tubes.

10. Remove check valve from brake booster.

11. Perform inspection after removal. Refer to 

BR-38, "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.

- Except R9M

- R9M

• 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-13, "Draining"

.

JPFIA0019ZZ

A

:98

°±

 5

°

B

:0

°±

5

°

: Vehicle upper side

JSFIA2543ZZ

A

:  70

°±

5

°

B

:  0

°±

5

°

: Vehicle upper side

JSFIA2542ZZ