Nissan Quest E52. Manual - part 221

 

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Nissan Quest E52. Manual - part 221

 

 

BR-28

< REMOVAL AND INSTALLATION >

BRAKE MASTER CYLINDER

5.

Remove reservoir tank, bracket and hose.

6.

Remove air duct and air cleaner case. Refer to 

EM-26, "Removal and Installation"

.

7.

Separate the brake tube from master cylinder assembly with a
flare nut wrench (A).

CAUTION:

Never scratch the flare nut and the brake tube.

8.

Remove the master cylinder assembly.

CAUTION:

• Never deform or bend the brake tubes.
• Never depress the brake pedal after the master cylinder

assembly is removed.

• The piston (A) of the master cylinder assembly is

exposed. Never damage it when removing the master cyl-
inder.

• The piston may drop off when pulled out strongly. Never

hold the piston. Hold the cylinder body when handling the
master cylinder assembly.

9.

Remove the O-ring.

INSTALLATION

Note the following, and install in the reverse order of removal.
• 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.

• Never depress the brake pedal while removing the brake tube. If this is not complied with, brake fluid may

splash.

• Never depress the brake pedal after the master cylinder assembly is removed.
• Apply polyglycol ether based lubricant to the brake booster [see

(A) in the figure] when installing the master cylinder assembly to
the brake booster.

• The piston (A) 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 reuse the O-ring.
• Never deform or bend the brake tubes.

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BRAKE MASTER CYLINDER

BR-29

< REMOVAL AND INSTALLATION >

C

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

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

BR-20, "FRONT :

Exploded View"

.

• Align paint mark of hose with sub tank projection (A), and install

hose to sub tank.

• When installing hose, insert it until its tip reaches the back-end of

length (A) or further as show in the figure.

• Perform the air bleeding. Refer to 

BR-11, "Bleeding Brake System"

• Perform inspection after installation. Refer to 

BR-30, "Inspection"

.

Disassembly and Assembly

INFOID:0000000009651826

DISASSEMBLY

CAUTION:

• Never disassemble the cylinder body.
• Remove the sub tank only when necessary.
• Never drop the when installing. The parts must not be reused if they are dropped.
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 sub tank mounting pin with a pin punch (A) [4 mm
(0.16 in)].

3.

Remove the sub tank and grommet from the cylinder body.

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A

: 25 mm (0.98 in) or more

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BR-30

< REMOVAL AND INSTALLATION >

BRAKE MASTER CYLINDER

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 sub tank.
• Never drop the 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 the grommets.

2.

Install the sub tank to the cylinder body.

3.

Fix the cylinder body to a vise.

CAUTION:

• Place the sub tank with the chamfered pin 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 sub tank so that a mounting pin can be inserted. Insert a
mounting pin with a pin punch (A) [4 mm (0.16 in)]. Return the
sub tank to the horizontal position. Insert another mounting pin
into the pin hole on the opposite side in the same manner after
the mounting pin passes through the cylinder body pin hole.

CAUTION:

Never reuse the pin.

Inspection

INFOID:0000000009651827

INSPECTION BEFORE REMOVAL

Check the brake fluid level switch. Refer to 

BRC-91, "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-22, "FRONT : Inspection"

.

CAUTION:

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

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BRAKE BOOSTER

BR-31

< REMOVAL AND INSTALLATION >

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BRAKE BOOSTER

Exploded View

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Removal and installation

INFOID:0000000009651829

REMOVAL

1.

Perform inspection before removal. Refer to 

BR-32, "Inspection and Adjustment"

.

2.

Remove brake master cylinder assembly. Refer to 

BR-27, "Removal and Installation"

.

3.

Remove intelligent key warning buzzer. Refer to 

DLK-491, "Removal and Installation"

.

4.

Remove vacuum hose from brake booster. Refer to 

BR-33, "Removal and Installation"

.

5.

Remove snap pin (1) and clevis pin (2). Refer to 

BR-18,

"Exploded View"

.

6.

Remove nuts on brake booster and brake pedal assembly.

CAUTION:

Hold the brake booster so as to avoid dropping out.

7.

Remove brake booster.

CAUTION:

Never deform or bend the brake tubes.
NOTE:
If removing brake booster is difficult, remove clevis from brake
booster.

8.

Perform inspection after removal. Refer to 

BR-32, "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.
Note the following, and install in the reverse order of removal.
• Be careful not to damage brake booster stud bolt threads. If brake booster is tilted during installation, the

dash panel may damage the threads.

• Never deform or bend the brake tubes when installing the brake booster.
• Always use a gasket between the brake booster and the dash panel.

1.

Master cylinder assembly

2.

Brake booster

3.

Lock nut

4.

Clevis

5.

Gasket

: N·m (kg-m, ft-lb)

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