Nissan Pathfinder (2012 year). Manual — 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
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.
August 2012
2012 Pathfinder
BR-32
< REMOVAL AND INSTALLATION >
BRAKE MASTER CYLINDER
BRAKE MASTER CYLINDER
Removal and Installation
INFOID:0000000007356624
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
August 2012
2012 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 and O-ring.
CAUTION:
Do not reuse O-ring.
INSTALLATION
Installation is in the reverse order of removal.
• Apply silicone grease to the brake booster at position (A) as shown
when installing the master cylinder assembly to the brake booster.
• Use new master cylinder assembly nuts and O-ring for installation.
CAUTION:
Do not reuse the master cylinder assembly nuts or O-ring.
• Refill the brake fluid and bleed the brake system. Refer to
.
CAUTION:
• Refill using recommended brake fluid. Refer to
• Do not reuse drained brake fluid.
• Adjust the brake pedal. Refer to
BR-17, "Inspection and Adjust-
BR-18, "Inspection and Adjustment - Adjustable Pedal"
.
VK56DE
JPFIA0013ZZ
AWFIA0864GB
August 2012
2012 Pathfinder
BR-34
< REMOVAL AND INSTALLATION >
BRAKE MASTER CYLINDER
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.
CAUTION:
Discard the nuts, do not reuse.
5. Remove the master cylinder assembly and O-ring.
CAUTION:
Do not reuse O-ring.
INSTALLATION
Installation is in the reverse order of removal.
• Apply silicone grease to the brake booster at position (A) as
shown, be sure O-ring is in the proper position when installing the
master cylinder assembly to the brake booster.
• Use new master cylinder assembly nuts and O-ring for installation.
CAUTION:
Do not reuse the master cylinder assembly nuts or O-ring.
• Refill the brake fluid and bleed the brake system. Refer to
.
CAUTION:
• Refill using recommended brake fluid. Refer to
• Do not reuse drained brake fluid.
• Adjust the brake pedal. Refer to
BR-17, "Inspection and Adjustment - Standard Pedal"
,
and Adjustment - Adjustable Pedal"
.
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
JPFIA0013ZZ
August 2012
2012 Pathfinder
BRAKE BOOSTER
BR-35
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BRAKE BOOSTER
Removal and Installation
INFOID:0000000007356625
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
August 2012
2012 Pathfinder
BR-36
< REMOVAL AND INSTALLATION >
BRAKE BOOSTER
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
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
August 2012
2012 Pathfinder
BRAKE BOOSTER
BR-37
< REMOVAL AND INSTALLATION >
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1. Loosen the lock nut to adjust the input rod so that length (B) is
within the specified value.
2. After adjusting input rod length (B), 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 brake master cylinder. Refer to
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"
,
"Inspection and Adjustment - Adjustable Pedal"
10. Tighten the input rod lock nut to specification.
11. Refill with new brake fluid and bleed the brake system. Refer to
Input rod installation length (B) : Refer to
.
WFIA0382E
JPFIA0019ZZ
August 2012
2012 Pathfinder
BR-38
< REMOVAL AND INSTALLATION >
VACUUM LINES
VACUUM LINES
Removal and Installation
INFOID:0000000007356626
Brake Booster Vacuum Hose
REMOVAL
1. Disconnect brake booster hose from hose clip bracket.
2. Release the brake booster hose clamps and remove the brake booster hose.
3. Remove the brake booster vacuum check valve from the brake booster.
INSTALLATION
Installation is in the reverse order of removal.
• Insert brake booster hose onto tube and brake booster vacuum
check valve for a minimum length (A) before installing the brake
booster hose clamps.
CAUTION:
Do not use lubricating oil during installation.
WFIA0332E
1.
Brake booster hose
2.
Brake booster hose clamp
3.
Brake booster vacuum check valve
Brake booster hose length (A) : 24 mm (0.94 in) or more
JPFIA0023ZZ
August 2012
2012 Pathfinder
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