Nissan Pathfinder (2011 year). Instruction — part 88

BRAKE TUBE AND HOSE

BR-31

< REMOVAL AND INSTALLATION >

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1. Check brake pipes and hoses, and connections for fluid leaks, damage, twist, deformation, contact with

other parts, and loose connections. Replace any parts as necessary. Refer to

BR-26, "Hydraulic Circuit"

.

2. While depressing brake pedal under a force of 785 N (80 kg-f, 177 lb-f) with engine running for approxi-

mately 5 seconds, check each part for fluid leaks.

2011 Pathfinder

BR-32

< REMOVAL AND INSTALLATION >

BRAKE MASTER CYLINDER

BRAKE MASTER CYLINDER

Removal and Installation

INFOID:0000000006245721

VQ40DE

REMOVAL

CAUTION:

Be careful not to splash brake fluid on painted areas; it may cause paint damage. If brake fluid is

splashed on painted areas, wash it away with water immediately.

NOTE:

When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-

ing.
1. Remove master cylinder reservoir cap.
2. Disconnect the harness connector for the fluid level sensor.
3. Disconnect the brake pipes from the master cylinder assembly, using suitable tool.

AWFIA0810GB

1.

Reservoir cap

2.

Strainer

3.

Fluid level sensor

4.

Reservoir tank

5.

Grommet

6.

Restriction washer

7.

Master cylinder sub-assembly

8.

Pin

9.

O-ring

10. Brake booster

A.

PBC (Poly Butyl Cuprysil) grease
or silicone based grease

B.

Brake fluid

R.

Rubber grease

Front

2011 Pathfinder

BRAKE MASTER CYLINDER

BR-33

< REMOVAL AND INSTALLATION >

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4. Remove the master cylinder assembly nuts and discard.

CAUTION:

Discard the nuts, do not reuse.

5. Remove the master cylinder assembly.

INSTALLATION

Installation is in the reverse order of removal.

• Use new master cylinder assembly nuts for installation.

CAUTION:

Do not reuse the master cylinder assembly nuts.

• Refill the brake fluid and bleed brake system. Refer to

BR-20, "Bleeding Brake System"

.

CAUTION:

• Refill using recommended brake fluid. Refer to

BR-20, "Drain and Refill"

.

• Do not reuse drained brake fluid.

• Adjust the brake pedal. Refer to

BR-17, "Inspection and Adjustment - Standard Pedal"

,

BR-18, "Inspection

and Adjustment - Adjustable Pedal"

.

• Apply silicone grease to the brake booster at position (A) as

shown, be sure O-ring is in proper position when installing the

master cylinder assembly to the brake booster.

CAUTION:

Do not reuse O-ring.

JPFIA0013ZZ

2011 Pathfinder

BR-34

< REMOVAL AND INSTALLATION >

BRAKE MASTER CYLINDER

VK56DE

REMOVAL

CAUTION:

• Be careful not to splash brake fluid on painted areas; it may cause paint damage. If brake fluid is

splashed on painted areas, wash it away with water immediately.

• Before removing brake master cylinder, depress the brake pedal 5-6 times with the key OFF to

deplete vacuum in the booster.

NOTE:

When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-

ing.
1. Remove master cylinder reservoir cap.
2. Disconnect harness connectors for fluid level sensor, rear pressure sensor and front pressure sensor.
3. Disconnect brake pipes from the master cylinder assembly, using suitable tool.
4. Remove the master cylinder assembly nuts and discard.

AWFIA0864GB

1.

Reservoir cap

2.

Strainer

3.

Fluid level sensor

4.

Reservoir tank

5.

Grommet

6.

Restriction washer

7

Master cylinder sub-assembly

8.

Pin

9.

O-ring

10. Brake booster

11. Front pressure sensor

12. Rear pressure sensor

A.

PBC (Ploy Butyl Cuprisil) grease or
silicone based grease

B.

Brake fluid

R.

Rubber grease

Front

2011 Pathfinder

BRAKE MASTER CYLINDER

BR-35

< REMOVAL AND INSTALLATION >

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CAUTION:

Discard the nuts, do not reuse.

5. Remove the master cylinder assembly.

INSTALLATION

Installation is in the reverse order of removal.

• Use new master cylinder assembly nuts for installation.

CAUTION:

Do not reuse the master cylinder assembly nuts.

• Refill the brake fluid and bleed brake system. Refer to

BR-20, "Bleeding Brake System"

.

CAUTION:

• Refill using recommended brake fluid. Refer to

BR-20, "Drain and Refill"

.

• Do not reuse drained brake fluid.

• Adjust the brake pedal. Refer to

BR-17, "Inspection and Adjustment - Standard Pedal"

,

BR-18, "Inspection

and Adjustment - Adjustable Pedal"

.

• Apply silicone grease to the brake booster at position (A) as

shown, be sure O-ring is in proper position when installing the

master cylinder assembly to the brake booster.

CAUTION:

Do not reuse O-ring.

JPFIA0013ZZ

2011 Pathfinder

BR-36

< REMOVAL AND INSTALLATION >

BRAKE BOOSTER

BRAKE BOOSTER

Removal and Installation

INFOID:0000000006245722

VQ40DE

AWFIA0463GB

1.

Brake booster vacuum hose

2.

Brake booster vacuum check valve 3.

Brake booster

4.

Lock nut

5.

Gasket

6.

Spacer block

Front

2011 Pathfinder

BRAKE BOOSTER

BR-37

< REMOVAL AND INSTALLATION >

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VK56DE

REMOVAL

CAUTION:

• Be careful not to deform or bend brake piping 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 or inclined during

installation, dash panel may damage the threads.

• Attach the check valve in the correct direction.

NOTE:

When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-

ing.
1. Remove the ABS actuator and electric unit (control unit). Refer to

BRC-231, "Removal and Installation"

.

2. Remove the master cylinder assembly. Refer to

BR-32, "Removal and Installation"

.

3. Disconnect brake booster vacuum hose from the brake booster. Refer to

BR-39, "Removal and Installa-

tion"

.

4. Disconnect the active booster and delta stroke sensor harness connector (if equipped).
5. Remove the brake pedal clevis pin (2) and snap pin (1) from

inside the vehicle.

6. Remove the brake booster and brake pedal assembly nuts and discard.

CAUTION:

Discard the nuts, do not reuse.

7. Remove brake booster assembly from dash panel.

INSTALLATION

AWFIA0416GB

1.

Reservoir tank

2.

Master cylinder assembly

3.

Gasket

4.

Brake pedal

5.

Lock nut

6.

Spacer block

7

Brake booster

8.

Active booster

9.

Delta stroke sensor

JPFIA0019ZZ

2011 Pathfinder

BR-38

< REMOVAL AND INSTALLATION >

BRAKE BOOSTER

1. Loosen the lock nut (1) to adjust the input rod (2) so that length

(A) is within the specified value.

2. After adjusting input rod length (A), temporarily tighten the lock

nut (1) and install the booster assembly to the dash panel.

• Install gaskets and spacer block between the booster assem-

bly and the dash panel.

3. Connect the input rod using the brake pedal clevis pin (2) and

snap pin (1) from inside the vehicle.

4. Install the brake booster using new nuts.

CAUTION:

Do not reuse the brake booster and brake pedal assembly nuts.

5. Install the brake piping to the master cylinder assembly. Refer to

BR-26, "Hydraulic Circuit"

.

6. Connect the active booster and delta stroke sensor harness connectors (if equipped).
7. Connect the brake booster vacuum hose and check valve to the brake booster.
8. Install the master cylinder assembly. Refer to

BR-32, "Removal and Installation"

.

9. Adjust the brake pedal height. Refer to

BR-17, "Inspection and Adjustment - Standard Pedal"

,

BR-18,

"Inspection and Adjustment - Adjustable Pedal"

.

10. Tighten the input rod lock nut to specification.
11. Refill with new brake fluid and bleed brake system. Refer to

BR-20, "Bleeding Brake System"

.

Input rod (2) with lock nut (1)
length (A) standard dimension

: Refer to

BR-61, "Brake

Booster"

.

JPFIA0238ZZ

JPFIA0019ZZ

2011 Pathfinder