Nissan Murano Z50 (2003 year). Manual - part 47

 

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Nissan Murano Z50 (2003 year). Manual - part 47

 

 

BRAKE PIPING AND HOSE

BR-13

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BRAKE PIPING AND HOSE

PFP:46210

Hydraulic Circuit

AFS0016X

CAUTION:

All hoses and pipings (tubes) must be free from excessive bending, twisting and pulling.

Make sure there is no interference with other parts when turning steering both clockwise and
counterclockwise.

The brake piping is an important safety part. If a brake fluid leak is detected, always disassemble
the parts. Replace applicable part with a new one, if necessary.

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.

Do not bend or twist brake hose sharply, or strongly pull it.

When removing components, put cover on the connections so that no dirt, no dust, or no other
foreign matter gets in.

Refill with new brake fluid “ DOT 3 ”

Do not reuse drained brake fluid.

Removal and Installation of Front Brake Piping and Brake Hose 

AFS0016Y

REMOVAL

1.

Drain brake fluid. Refer to 

BR-11, "Drain and Refill"

 .

2.

Using a flare nut wrench, remove brake tube from brake hose.

3.

Remove union bolt and remove the brake hose from the caliper assembly.

4.

Remove the lock plate and remove the brake hose from the vehicle.

PFIA0403E

BR-14

BRAKE PIPING AND HOSE

Revision; 2004 April

2003 Murano

INSTALLATION

1.

Install brake hose by aligning with the protrusion on caliper
assembly, and tighten union bolt to the specified torque.

NOTE:
Do not reuse the copper washer.

2.

Install brake hose to the brake tube, partially tighten the flare nut
as must as possible by hand, then secure it to the bracket with
lock plate.

3.

Using a flare nut wrench, tighten flare nut to the specified
torque.

4.

Refill brake fluid and bleed air. Refer to 

BR-11, "Drain and Refill"

 .

Removal and Installation of Rear Brake Piping and Brake Hose 

AFS00170

REMOVAL

1.

Drain brake fluid. Refer to 

BR-11, "Drain and Refill"

 .

2.

Using a flare nut wrench, remove brake tube from brake hose.

3.

Remove union bolts, and then remove brake hose from the caliper assembly.

4.

Remove the lock plate and then remove the brake hose from the vehicle.

INSTALLATION

1.

Install the brake hose to the caliper assembly positioning hole
and tighten union bolt to the specified torque.

NOTE:
Do not reuse the copper washer.

2.

Install brake hose to the brake tube, partially tighten the flare nut
as must as possible by hand, then secure it to the bracket with
lock plate.

3.

Using a flare nut wrench, tighten flare nut to the specified
torque.

4.

Refill brake fluid and bleed air. Refer to 

BR-12, "Bleeding Brake System"

 .

Inspection After Installation

AFS00172

CAUTION:

If leakage occurs around hose and tube connections, retighten. If necessary, replace damaged part.

1.

Check brake lines (tubes and hoses) and connections for fluid leakage, damage, twist, deformation, con-
tact with other parts, and loose connections. Replace any damage parts.

2.

While depressing brake pedal under a force of 785 N (80 kg, 177 lb) with engine running at idle speed for
approximately 5 seconds, check each part for fluid leakage.

: 16.7 - 19.6 N·m (1.7 - 1.9 kg-m, 13 - 14 ft-lb)

: 14.8 - 17.6 N·m (1.5 - 1.7 kg-m, 11 - 12 ft-lb)

PFIA0404E

: 16.7 - 19.6 N·m (1.7 - 1.9 kg-m, 13 - 14 ft-lb)

PFIA0405E

BRAKE MASTER CYLINDER

BR-15

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BRAKE MASTER CYLINDER

PFP:46010

On Board Inspection

AFS00173

LEAK INSPECTION

Check for fluid leakage from master cylinder attachment portion, reservoir tank, reservoir hose connec-
tions, and brake tube connections.

Removal and Installation

AFS00174

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.

REMOVAL

1.

Drain brake fluid. Refer to 

BR-11, "Drain and Refill"

 .

2.

Remove air cleaner and air duct. Refer to 

EM-14, "AIR CLEANER AND AIR DUCT"

 .

3.

Disconnect harness connectors for fluid level sensor and pressure sensor (VDC model only).

4.

Using a flare nut wrench, disconnect master cylinder assembly and brake tube.

5.

Remove master cylinder assembly nut, remove sub tank assembly bolt and remove master cylinder
assembly from vehicle. Refer to 

BR-23, "Removal and Installation"

 .

INSTALLATION

CAUTION:

Refill with new brake fluid “DOT3”.

Do not reuse drained brake fluid.

Install in the reverse order of removal.

Refill brake fluid and bleed air. Refer to 

BR-12, "Bleeding Brake System"

 .

BR-16

BRAKE MASTER CYLINDER

Revision; 2004 April

2003 Murano

Components

AFS00175

WITH VDC MODELS

1.

Reservoir cap

2.

Oil strainer

3.

Hose and clamp

4.

Clamp

5.

Bracket

6.

Reservoir tank

7.

Grommet

8.

Master cylinder assembly

9.

Clip

10. Pressure sensor

11. Sub tank

PFIA0408E

BRAKE MASTER CYLINDER

BR-17

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WITHOUT VDC MODELS

1.

Reservoir cap

2.

Oil strainer

3.

Hose and clamp

4.

Clamp

5.

Bracket

6.

Reservoir tank

7.

Grommet

8.

Piston stopper

9.

Cylinder body

10. Pin

11. Secondary piston assembly

12. Primary piston assembly

13. Stopper cap

14. Sub tank

PFIA0409E

BR-18

BRAKE MASTER CYLINDER

Revision; 2004 April

2003 Murano

Disassembly and Assembly

AFS00176

WITHOUT VDC MODELS
Disassembly

CAUTION:

Remove the reservoir tank only when absolutely necessary.

1.

Using a flat-bladed screwdriver as shown in the figure, lift up the
tabs on the stopper cap and remove it from the master cylinder.
The piston inside the master cylinder might pop out when this is
done, so hold the stopper cap down at the same time.

2.

Place the side flange of cylinder body with chamfering around
the pin insertion hole facing up, and firmly set master cylinder
assembly in a vise.

CAUTION:

When setting the master cylinder assembly with the vise,
be sure not to over-tighten.

When setting securing with a vise, use copper plates or
cloth to protect the flange.

3.

Using a pin punch [commercial service tool: diameter approxi-
mately 4 mm (0.16 in)], remove mounting pins on the reservoir
tank.

4.

Remove master cylinder assembly from vise.

5.

Remove reservoir tank and grommet from cylinder body.

6.

Using a flat-bladed screwdriver, push in the piston and remove
piston stopper from cylinder body.

7.

Carefully pull the primary piston assembly straight out to prevent
cylinder inner wall from being damaged.

BRA0031D

PFIA0438E

PFIA0439E

PFIA0440E

BRAKE MASTER CYLINDER

BR-19

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8.

Tap flange using a soft block such as wood, and carefully pull
the secondary piston assembly straight out to prevent cylinder
inner wall from being damaged.

Inspection After Disassembly

Master cylinder

Check the inner wall of the cylinder for damage, abrasion, corrosion and pin holes.
If defective, replace the master cylinder.

Assembly

CAUTION:

Never use mineral oils such as kerosene, gasoline during the cleaning and assembly process.

Make sure there is no foreign matter such as dirt or dust attached to the inner cylinder walls, the
piston, or the cap seal, and take care to avoid damaging parts with the assembly tools.

Do not drop parts. If a part is dropped, do not use it.

1.

Apply brake fluid to cylinder inner wall body and contact surface
of the piston assembly. Then insert secondary piston assembly
and primary piston assembly into cylinder body in this order.

CAUTION:

Do not reuse primary and secondary piston assemblies.

Be sure to replace the assembly without disassembling
the new inner kit.

Pay attention to the orientation of the piston cup, and
insert straight to prevent the cup from being caught by
cylinder inner wall.

2.

Visually check the secondary piston slit through the tank boss
hole on the secondary side of the cylinder body, and insert the
piston stopper.

3.

Holding down the primary piston with the stopper cap, push the
stopper cap claws so they are firmly into the cylinder grooves,
then install the stopper cap.

CAUTION:

Do not reuse the stopper cap.

4.

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

CAUTION:

Do not reuse the grommet.

5.

Master cylinder assembly is fixed in the vise as described in
“disassembly: step 2”. 

BRA0033D

SBR089C

PFIA0440E

BRA0035D

BR-20

BRAKE MASTER CYLINDER

Revision; 2004 April

2003 Murano

6.

Using a pin punch [commercial service tool: diameter approx. 4
mm (0.16 in)], insert the reservoir tank mounting pin into the pin
hole so that the attachment side and the opposite side are iden-
tical.

CAUTION:

Do not reuse reservoir tank grommet and mounting pin.

PFIA0439E

BRAKE MASTER CYLINDER

BR-21

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WITH VDC MODELS
Disassembly

CAUTION:

Master cylinder cannot be disassembled.

Remove the reservoir tank only when absolutely necessary.

1.

Remove clip.

2.

Remove reservoir tank and grommet from cylinder body.

Assembly

CAUTION:

Do not use mineral oils such as kerosene, gasoline during the cleaning and assembly process.

Do not drop parts. If a part is dropped, do not use it.

1.

Apply brake fluid the grommet and attach to the cylinder body.

CAUTION:

Do not reuse the grommet.

2.

Install reservoir tank onto the cylinder body.

3.

Insert the clip.

PFIA0424E

PFIA0424E

BR-22

BRAKE BOOSTER

Revision; 2004 April

2003 Murano

BRAKE BOOSTER

PFP:47200

On-Vehicle Service

AFS00177

OPERATING CHECK

With the engine stopped, change the vacuum to the atmospheric
pressure by depressing the brake pedal several times. Then with
brake pedal fully depressed, start the engine and when the vacuum
pressure reaches the standard, make sure the clearance between
the brake pedal and floor panel decreases.

CAUTION:

Depressing pedal interval is approximately 5 seconds.

AIRTIGHT CHECK

Start engine, and stop if after one minute. Depress brake pedal
several times slowly. The pedal should go further down the first
tie, and then if should gradually rise thereafter.

Depress brake pedal while engine is running, and stop
engine with pedal depressed. The pedal stroke should not
change after holding pedal down for 30 seconds.

CAUTION:

Depressing brake pedal interval is approximately 5 seconds.

BRA0037D

SBR365AA

BRAKE BOOSTER

BR-23

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Removal and Installation

AFS00178

1.

Master cylinder

2.

Reservoir tank

3.

Brake booster

4.

Gasket

5.

Lock nut

PFIA0441E

BR-24

BRAKE BOOSTER

Revision; 2004 April

2003 Murano

REMOVAL 

CAUTION:

Be careful not to deform or bend brake piping while removing and installing the 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, the dash panel may damage the threads.

Attach the check valve in the correct orientation.

1.

Remove brake master cylinder. Refer to 

BR-15, "BRAKE MASTER CYLINDER"

2.

Remove cowl top cover. Refer to 

EI-21, "COWL TOP"

 .

3.

Remove vacuum hose from the brake booster. Refer to 

BR-25, "VACUUM LINES"

 .

4.

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

5.

Remove brake tube bracket from dash panel.

6.

Remove nuts from the brake booster and brake pedal assembly.

7.

Remove brake booster assembly from the dash panel.

INSPECTION AFTER REMOVAL
Output Rod Length Inspection

1.

Using a handy vacuum pump, apply a vacuum of – 66.7 kPa (–
500 mmHg,19.69 inHg) to the brake booster.

2.

Check output rod length.

INSTALLATION

1.

Loosen the lock nut to adjust the input rod length so that the
length B (in the figure) satisfies the specified value.

2.

After adjusting “B”, temporarily tighten the lock nut to install the
booster assembly to the vehicle. At this time, make sure to
install a gasket between the booster assembly and the dash
panel.

3.

Connect the brake pedal with the clevis of the input rod.

4.

Install the pedal bracket mounting nuts and tighten them to the
specified torque.

5.

Install the master cylinder to the booster assembly. Refer to 

BR-15, "Removal and Installation"

 .

6.

Adjust the height and play of the brake pedal.

7.

Tighten the lock nut of the input rod to the specified torque.

8.

Install vacuum hose to brake booster. Refer to 

BR-25, "VACUUM LINES"

 .

9.

Install brake tube bracket to dash panel.  

10. Install cowl top cover. Refer to 

EI-21, "COWL TOP"

 .

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

BR-12, "Bleeding Brake System"

 .

SBR208E

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

Without VDC models

: 10.4mm (0.409 in)

With VDC models

: – 15.7mm (– 0.6181 in)

Length “B”

: 125 mm (4.92 in)

SGIA0060E

VACUUM LINES

BR-25

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VACUUM LINES

PFP:41920

Removal and Installation

AFS00179

CAUTION:

Because vacuum hose contains a check valve, it must be installed in the correct orientation. Refer
to the stamp or label to confirm correct installation. The brake booster will not operate normally if
the hose is installed in the wrong direction.

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

Do not use lubricating oil during assembly.

Inspection

AFS0017A

VISUAL INSPECTION

Check vacuum hose and connections for air tightness, improper attachment, chafing and deterioration.
Repair or replace as necessary.

1.

Clamp

2.

Vacuum hose

3.

Check valve inclusion position stamp

4.

Clamp

5.

Vacuum piping

6.

Clamp

7.

Vacuum hose

8.

Clamp

9.

Brake booster

PFIA0407E

SBR225B

BR-26

VACUUM LINES

Revision; 2004 April

2003 Murano

CHECK VALVE INSPECTION
Airtightness Inspection

Check vacuum with a vacuum pump.

Connected to booster side (1):

 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)

Connected to engine side (2):

 Vacuum should not exist.

SFIA0210E

FRONT DISC BRAKE

BR-27

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FRONT DISC BRAKE

PFP:41000

On-Board Inspection

AFS0017B

PAD WEAR INSPECTION

Check the thickness of the pad from inspection hole of the cylin-
der body. Use a scale for inspection if necessary.

Components

AFS0017C

Standard thickness

: 9.5 mm (0.374 in)

Repair limit thickness

: 2.0 mm (0.079 in)

BRA0010D

1.

Union bolt

2.

Copper washer

3.

Brake hose

4.

Sliding pin bolt

5.

Sliding pin

6.

Cap

7.

Bleed valve

8.

Cylinder body

9.

Sliding pin boot

10. Piston seal

11.

Piston

12. Piston boot

13. Torque member

14. Inner shim cover

15. Inner shim

16. Inner pad

17. Pad retainer (Upper)

18. Pad retainer (Lower)

19. Outer pad

20. Outer shim

21. Washer

22. Torque member fixing bolt

PFIA0410E

BR-28

FRONT DISC BRAKE

Revision; 2004 April

2003 Murano

WARNING:

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

CAUTION:

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

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

Do not damage piston boot.

If any shim is subject to serious corrosion, replace it with a new one.

Always replace shims and shim covers as a set when replacing brake pads.

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

BR-32, "BRAKE BURNISHING PROCEDURE"

 .

Removal and Installation of Brake Pad

AFS0017D

REMOVAL

1.

Remove tires from vehicle with power tool.

2.

Remove lower sliding pin bolt.

3.

Suspend cylinder body with a wire and remove the pad and shim
from the torque member.

CAUTION:

When removing the pad retainer from the torque member,
lift the pad retainer in the arrow direction (shown in the fig-
ure) so as not to deform it.

INSTALLATION

1.

Attach the inner shim and shim cover to the inner pad and the outer shim to the outer pad.

2.

Push the piston in so that the pad is attached and attach the cylinder body to the torque member.
NOTE:
Using a disc brake piston tool (commercial service tool), etc., makes it easier to push in the piston.

CAUTION:

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

When attaching the pad retainer, attach it firmly so that it
does not float up higher than the torque member, as
shown in the figure.

3.

Install lower sliding pin bolt, and tighten it to the specified torque.

4.

Check brake for drag.

5.

Install the tires to the vehicle.

Removal and Installation of Brake Caliper Assembly

AFS0017E

REMOVAL

1.

Remove tires from vehicle with power tool.

2.

Drain brake fluid. Refer to 

BR-11, "Drain and Refill"

 .

3.

Remove union bolts and torque member bolts, and remove brake caliper assembly.

4.

Remove disc rotor.

SBR556E

PFIA0273E

 

 

 

 

 

 

 

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