Nissan Pathfinder (2006 year). Manual - part 112

BRAKE BOOSTER

BR-19

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2006 Pathfinder

Removal and Installation

EFS0063R

Brake Booster

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 dur-
ing installation, dash panel may damage the threads.

●

Attach the check valve in the correct direction.

1.

Remove actuator and electric unit. Refer to 

BRC-62, "Removal and Installation"

 .

2.

Remove brake piping from brake master cylinder.

LFIA0241E

1.

Brake booster hose

2.

Brake booster vacuum check valve

3.

Brake booster

4.

Lock nut

5.

Gasket

6.

Spacer block

BR-20

BRAKE BOOSTER

2006 Pathfinder

3.

Remove brake master cylinder. Refer to 

BR-16, "Removal and Installation"

 .

4.

Remove vacuum hose from brake booster. Refer to 

BR-21, "VACUUM LINES"

 .

5.

Remove brake pedal attachment snap pin and clevis pin from inside the vehicle. 

6.

Remove nuts on brake booster and brake pedal assembly.

7.

Remove brake booster assembly from dash panel.

INSPECTION AFTER REMOVAL
Output Rod Length Inspection

1.

Using a suitable vacuum pump, apply a vacuum of -66.7 kPa (-
500 mmHg, -19.69 inHg) to brake booster.

2.

Check output rod length.

INSTALLATION

1.

Loosen lock nut to adjust input rod length so that the length "B"
satisfies the specified value.

2.

After adjusting "B", temporarily tighten lock nut and install
booster assembly to the vehicle.

●

Install a gaskets and spacer block between booster assembly
and the dash panel.

3.

Connect brake pedal with clevis of input rod.

4.

Install brake booster nuts.

5.

Install brake piping from brake master cylinder to actuator and
electric unit. Refer to 

BR-13, "Hydraulic Circuit"

 .

6.

Connect vacuum hose to brake booster.

7.

Install master cylinder to booster assembly. Refer to 

BR-19, "Removal and Installation"

 .

8.

Adjust the height of brake pedal. Refer to 

BR-6, "Inspection and Adjustment"

 .

9.

Tighten input rod lock nut.

10. Refill new brake fluid and bleed air. Refer to 

BR-12, "Bleeding Brake System"

 .

Standard dimension when 
vacuum – 66.7 kPa (– 500 
mmHg, – 19.69 inHg)

: 15.6 

−

 15.9 mm 

(0.614 

−

 0.626 in)

SBR208E

Length "B"

: 150 mm (5.91 in)

SGIA0060E

VACUUM LINES

BR-21

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2006 Pathfinder

VACUUM LINES

PFP:41920

Removal and Installation

EFS0063S

Brake Booster Vacuum Hose

1.

Disconnect brake booster hose from hose clip mounted on bracket.

2.

Release clips and disconnect brake booster hose. 

3.

Remove check valve from brake booster.

4.

Installation is in the reverse order of removal.

CAUTION:

●

Insert vacuum hose for at least 24 mm (0.94 in).

●

Do not use lubricating oil during assembly.

Inspection

EFS0063T

VISUAL INSPECTION

Check for improper assembly, damage and deterioration.

WFIA0332E

1.

Brake booster hose

2.

Brake booster hose clip

3.

Brake booster vacuum check valve

SBR225B

BR-22

VACUUM LINES

2006 Pathfinder

CHECK VALVE INSPECTION
Airtightness Inspection

Use a suitable vacuum pump to check. Connect to brake booster
side of check valve.

Check 
valve 
specifi-
cation

: Vacuum decrease should be within 1.3 
kPa (10 mmHg, 0.39 inHg) for 15 seconds 
under a vacuum of – 66.7 kPa (– 500 mmHg, 
– 19.69 inHg)

LFIA0217E

FRONT DISC BRAKE

BR-23

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2006 Pathfinder

FRONT DISC BRAKE

PFP:41000

On-vehicle Inspection

EFS0063U

PAD WEAR INSPECTION

●

Inspect the thickness of pad through cylinder body inspection
hole. Use a scale for inspection if necessary.

Standard thickness

: 11.88 mm (0.468 in)

Repair limit thickness

: 1.0 mm (0.039 in)

BRA0010D

BR-24

FRONT DISC BRAKE

2006 Pathfinder

Components

EFS0063V

Front Disc Brake Caliper and Pads

WARNING:

Clean dust on caliper and brake pad with a vacuum dust collector to minimize the hazard of airborne
particles or other materials.

WFIA0461E

1.

Sliding pin bolt

2.

Cylinder body

3.

Piston seal

4.

Piston

5.

Piston boot

6.

Sliding pin

7.

Sliding pin boot

8.

Torque member bolt

9.

Torque member

10.

Upper pad retainer

11.

Outer shim

12. Inner brake pad

13.

Outer brake pad

14. Lower pad retainer

15. Shim cover

16.

Bleed valve

17. Cap

18. Copper washers

19.

Union bolt

20. Brake hose

⇐

Front

FRONT DISC BRAKE

BR-25

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2006 Pathfinder

CAUTION:

●

While removing cylinder body never depress brake pedal because piston will pop out. 

●

It is not necessary to remove bolts on torque member and brake hose except for disassembly or
replacement of cylinder body. In this case, hang cylinder body with a wire so as not to stretch
brake hose.

●

Do not damage piston boot.

●

Burnish brake contact surface after refinishing or replacing rotors, after replacing pads, or if a soft
pedal occurs at very low mileage. Refer to 

BR-29, "Brake Burnishing"

 .

Removal and Installation of Brake Pad

EFS0063W

REMOVAL

1.

Remove wheel and tire using power tool.

2.

Remove master cylinder reservoir cap.

3.

Remove lower sliding pin bolt using power tool.

4.

Suspend cylinder body with a wire and remove pads, shim, shim covers, and retainers from torque mem-
ber.

INSTALLATION

1.

Apply Molykote AS880N grease between outer brake pad plate and shim, then attach shim and shim cov-
ers to brake pads. Refer to 

MA-11, "RECOMMENDED FLUIDS AND LUBRICANTS"

 .

2.

Attach pad retainer to torque member, then install brake pad and
shim assemblies.

CAUTION:

When attaching pad retainer, attach it firmly so that it is
flush with torque member, as shown.

3.

Push pistons into cylinder body.

NOTE:
Using a disc brake piston tool (commercial service tool), etc.,
makes it easier to push in piston.

CAUTION:

By pushing in piston, brake fluid returns to master cylinder
reservoir tank. Watch the level of the surface of reservoir tank.

4.

Remove wire then swing cylinder body down over brake pad assemblies.

5.

Install lower sliding pin bolt and tighten to specification. Refer to 

BR-24, "Components"

 .

6.

Check brake for drag.

7.

Inspect fluid level, then install master cylinder reservoir cap.

8.

Install wheel and tire. Refer to 

WT-7, "Rotation"

 .

Removal and Installation of Brake Caliper and Disc Rotor

EFS0063X

REMOVAL

1.

Remove wheel and tire using power tool.

2.

Drain brake fluid as necessary. Refer to 

BR-11, "Drain and Refill"

 .

NOTE:
Do not remove union bolt unless removing cylinder body from vehicle.

3.

Remove union bolt as necessary and torque member bolts, then remove cylinder body from the vehicle.

NOTE:

●

Position cylinder body aside using suitable wire, as necessary.

●

When servicing brake caliper, remove sliding pin bolts and caliper from torque member.

4.

Remove torque member.

5.

Remove disc rotor.

INSTALLATION

CAUTION:

●

Refill with new brake fluid. Refer to 

MA-11, "Fluids and Lubricants"

 . 

●

Do not reuse drained brake fluid.

PFIA0273E

BR-26

FRONT DISC BRAKE

2006 Pathfinder

1.

Install disc rotor.

2.

Install torque member and tighten to specification. Refer to 

BR-24, "Components"

 .

3.

Install sliding pin bolts, if removed.

4.

Install cylinder body, then tighten sliding pin bolts to the specified
torque. Refer to 

BR-24, "Components"

 .

CAUTION:

When attaching cylinder body to the vehicle, wipe any oil
off knuckle spindle, washers and cylinder body attachment
surfaces.

5.

Install brake hose to cylinder body, if removed, then tighten
union bolt to the specified torque. Refer to 

BR-24, "Compo-

nents"

 .

CAUTION:

●

Do not reuse copper washers for union bolt.

●

Attach brake hose to cylinder body together with union
bolt and washers.

6.

Refill with new brake fluid as necessary and bleed air. Refer to 

BR-12, "Bleeding Brake System"

 .

7.

Install wheel and tire. Refer to 

WT-7, "Rotation"

 .

Disassembly and Assembly of Brake Caliper

EFS0063Y

DISASSEMBLY

1.

Remove sliding pin bolt, and then remove the pad, shim, shim cover, and pad retainer from the torque
member.

2.

Remove sliding pins and sliding pin boots from torque member.

3.

Place a wooden block as shown, and blow air from union bolt
mounting hole to remove pistons and piston boots.

CAUTION:

Do not get your fingers caught in piston.

LFIA0239E

LFIA0235E

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