Nissan Murano Z51 (2012 year). Manual - part 8

for symbols in the figure.

ABS actuator and electric unit (con-
trol unit)

Front disc brake

Master cylinder assembly

Brake booster

Connector

Rear disc brake

Brake tube

Brake hose

: Flare nut

: Union bolt

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2012 MURANO

BRAKE PIPING

BR-25

< REMOVAL AND INSTALLATION >

Install the brake hose L-pin by aligning it with the brake caliper
assembly positioning hole, and tighten the union bolt (1) to the
specified torque.

Connect the hose to the brake tube, temporarily tighten the flare
nut by hand until it does not rotate further, and fix the brake hose
to the bracket with the lock plate.

CAUTION:

Check that the brake hoses and tubes are not twisted and
bent.

Tighten the flare nut to the specified torque with a crowfoot and
torque wrench.

CAUTION:

Never scratch the flare nut and the brake tube.

Refill with new brake fluid and perform the air bleeding. Refer to

CAUTION:

Never reuse drained brake fluid.

REAR : Inspection

INFOID:0000000007543266

INSPECTION AFTER INSTALLATION

Check the brake hoses and tubes for the following: no scratches; no twist and deformation; no interfer-
ence with other components when steering the steering wheel; no looseness at connections.

Depress the brake pedal with a force of 785 N (80 kg, 176 lb) and hold down the pedal for approximately
5 seconds with the engine running. Check for any fluid leakage.

CAUTION:

Retighten the applicable connection to the specified torque and repair any abnormal (damaged,
worn or deformed) part if any brake fluid leakage is present.

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Revision: 2013 February

2012 MURANO

BR-26

< REMOVAL AND INSTALLATION >

BRAKE MASTER CYLINDER

BRAKE MASTER CYLINDER

Exploded View

INFOID:0000000007543267

Removal and Installation

INFOID:0000000007543268

REMOVAL

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.
1.

Drain brake fluid. Refer to

BR-11, "Draining"

Separate the brake fluid level switch harness connector.

Remove sub tank and hose.

Remove cowl top cover. Refer to

EXT-20, "Exploded View"

Remove front wiper drive assembly. Refer to

WW-111, "Exploded View"

Remove extension cowl top. Refer to

EXT-20, "Exploded View"

Remove air duct assembly and air cleaner case. Refer to

EM-31, "Exploded View"

Separate the brake tubes from the master cylinder assembly with a flare nut wrench.

CAUTION:

Never scratch the flare nut and the brake tube.

Remove the master cylinder assembly.

Sub tank cap

Sub tank

Sub tank bracket

Clamp

Hose

Clamp

Reservoir tank

Grommet

Cylinder body

10.

11.

O-ring

: Apply PBC (Poly Butyl Cuprysil) grease or silicone-based grease.

: Apply brake fluid.

Refer to

BR-21, "FRONT : Exploded View"

for symbols not described on the above.

JPFIA0426GB

Revision: 2013 February

2012 MURANO

BRAKE MASTER CYLINDER

BR-27

< REMOVAL AND INSTALLATION >

CAUTION:

• Depress the brake pedal several times to release the vacuum pressure from the brake booster.

Then remove the master cylinder assembly.

• Never depress the brake pedal after the master cylinder assembly is removed.
• The piston of the master cylinder assembly is exposed. Never damage it when removing the

master cylinder.

• The piston may drop off when pulled out strongly. Never hold the piston. Hold the cylinder body

when handling the master cylinder assembly.

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 the reverse order of removal.
• Never depress the brake pedal after the master cylinder assembly is removed.
• Apply PBC (Poly Butyl Cuprysil) silicone-based grease to the

brake booster [see (A) in the figure] when installing the master cyl-
inder assembly to the brake booster.

• The piston of the master cylinder assembly is exposed. Never

damage it when handling the master cylinder and check that no dirt
and dust are present on the piston before installation. 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.

• 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. Refer to

CAUTION:

Never scratch the flare nut and the brake tube.

• After installation, perform the air bleeding. Refer to

CAUTION:

Never reuse drained brake fluid.

Disassembly and Assembly

INFOID:0000000007543269

DISASSEMBLY

CAUTION:

• Never disassemble the cylinder body.
• Remove the reservoir tank if necessary.
1.

Fix the master cylinder assembly to a vise.

CAUTION:

Always set copper plates or cloth between vise when fixing the cylinder body to a vise. Never
overtighten the vise.

Remove the reservoir tank mounting pin with a pin punch.

Remove the reservoir tank and grommet from the cylinder body.

CAUTION:

Never drop the removed parts. The parts must not be
reused if they are dropped.

ASSEMBLY

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

CAUTION:

• Never use mineral oil such as gasoline or light oil.
• Never reuse the grommets.

JPFIA0013ZZ

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2012 MURANO

BR-28

< REMOVAL AND INSTALLATION >

BRAKE MASTER CYLINDER

Install the reservoir tank to the cylinder body.

CAUTION:

• Never drop the parts when installing. The parts must not be reused if they are dropped.
• Never reuse reservoir tank.

Fix the cylinder body to a vise.

CAUTION:

• Place the reservoir tank with the chamfered pin hole (

)

facing up.

• Always set copper plates or cloth between vise when fix-

ing the cylinder body to a vise. Never overtighten the vise.

Tilt the reservoir tank so that a mounting pin can be inserted.
Insert a mounting pin. Return the reservoir 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 mounting pin.

Inspection

INFOID:0000000007543270

INSPECTION AFTER INSTALLATION

Fluid Leak

Check for brake fluid leakage from the cylinder body-to-brake booster mounting face, reservoir tank mounting
face, brake tube connections and hose connections.

JPFIA0304ZZ

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2012 MURANO

BRAKE BOOSTER

BR-29

< REMOVAL AND INSTALLATION >

BRAKE BOOSTER

Exploded View

INFOID:0000000007543271

Removal and installation

INFOID:0000000007543272

REMOVAL

Remove brake master cylinder assembly. Refer to

BR-26, "Exploded View"

CAUTION:

• Depress the brake pedal several times to release the vacuum pressure from the brake booster.

Then remove the master cylinder assembly.

• Never depress the brake pedal after the master cylinder assembly is removed.
• The piston of the master cylinder assembly is exposed. Never damage it when removing the

master cylinder.

• The piston may drop off when pulled out strongly. Never hold the piston. Hold the cylinder body

when handling the master cylinder assembly.

Remove vacuum hose from brake booster. Refer to

BR-32, "Exploded View"

Remove snap pin (1) and clevis pin (2) from inside vehicle.

Remove nuts on brake booster and brake pedal assembly.

CAUTION:

Hold the brake booster so as to avoid dropping out.

Remove brake booster from dash panel in engine room side.

CAUTION:

Never deform or bend the brake tubes.

INSTALLATION

Note the following, and installation is 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 new gasket between the brake booster.

Master cylinder assembly

Brake booster

Lock nut

Clevis

Gasket

Refer to

BR-20, "Inspection and Adjustment"

for symbols in the figure.

JPFIA0425GB

JPFIA0019ZZ

Revision: 2013 February

2012 MURANO

BR-30

< REMOVAL AND INSTALLATION >

BRAKE BOOSTER

• Replace the clevis pin if it is damaged. Refer to

• After installation, perform the air bleeding. Refer to

CAUTION:

Never reuse drained brake fluid.

Inspection and Adjustment

INFOID:0000000007543273

INSPECTION AFTER REMOVAL

Air Tight

CAUTION:

Check the air tight condition when the master cylinder and the brake booster is installed.

With a handy vacuum pump, apply vacuum pressure of –66.7 kPa (–500 mmHg, –19.70 inHg) to the
brake booster.

If the air tight condition cannot be maintained, perform the following operation.

Check the no dirt and dust are present on the brake booster and brake master cylinder mating faces.
Clean it if necessary.

Check O-ring on the master cylinder. If anything is found, replace the O-ring.

Check the air tight condition again. If the condition still cannot be maintained, replace the brake booster.

Input Rod Length Inspection

Loosen the lock nut (1) and adjust the input rod (2) to the speci-
fied length (B).

Tighten the lock nut to the specified torque.

INSPECTION AFTER INSTALLATION

Operation

Depress the brake pedal several times at 5-second intervals with the
engine stopped. Start the engine with the brake pedal fully
depressed. Check that the clearance between brake pedal and dash
lower pane decreases.
NOTE:
A slight impact with a small click may be felt on the pedal when the
brake pedal is fully depressed. This is a normal phenomenon due to
the brake system operation.

Air Tight

Standard

: Refer to

BR-53, "Brake

Booster"

JPFIA0020ZZ

BRA0037D

Revision: 2013 February

2012 MURANO

BRAKE BOOSTER

BR-31

< REMOVAL AND INSTALLATION >

• Idle the engine for 1 minute to apply vacuum to the brake booster,

and stop the engine. Then depress the brake pedal several times
at 5-second intervals until the accumulated vacuum is released to
atmospheric pressure. Check that the clearance between brake
pedal and dash lower panel gradually increases (A

→

C) each

time the brake pedal is depressed during this operation.

• Depress the brake pedal with the engine running. Then stop the

engine while holding down the brake pedal. Check that the brake
pedal stroke does not change after holding down the brake pedal
for 30 seconds or more.
NOTE:
A slight impact with a small click may be felt on the pedal when the
brake pedal is fully depressed. This is a normal phenomenon due
to the brake system operation.

ADJUSTMENT AFTER INSTALLATION

Perform the brake pedal adjustment after installing the brake pedal assembly. Refer to

BR-8, "Inspection and

Adjustment"

JPFIA0043ZZ

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2012 MURANO

BR-32

< REMOVAL AND INSTALLATION >

VACUUM LINES

VACUUM LINES

Exploded View

INFOID:0000000007543274

Removal and Installation

INFOID:0000000007543275

REMOVAL

Remove the vacuum hose and tube.

INSTALLATION

Note the following, install the vacuum hose and tube.
• Because vacuum hose contains a check valve, it must be installed in the correct position. Refer to the stamp

to confirm correct installation. Brake booster will not operate normally if the hose is installed in the wrong
direction.

• When installing vacuum hose, insert it until its tip reaches the

back-end of length (A) or further as shown in the figure.

- Face the marking side up when assembling of vacuum hose.

(Brake booster and intake manifold side)

- Face the marking side vehicle front when assembling of vacuum

hose. (Vacuum tube side)

CAUTION:

Never use lubricating oil during assembly.

Inspection

INFOID:0000000007543276

INSPECTION AFTER REMOVAL

Appearance

Check for correct assembly, damage and deterioration.

Check Valve Airtightness

Clamp

Vacuum hose (built in check valve)

Vacuum tube

Vacuum hose

To intake manifold

Paint mark

Stamp indicating engine direction

To brake booster

JPFIA0306ZZ

Standard

: 24 mm (0.95 in) or more

JPFIA0023ZZ

Revision: 2013 February

2012 MURANO

VACUUM LINES

BR-33

< REMOVAL AND INSTALLATION >

• Use a handy vacuum pump (A) to check.

• Replace vacuum hose assembly if vacuum hose and check valve

are malfunctioning.

When connected to the brake booster side (B)

: Vacuum should decrease within 1.3 kPa (10 mm-
Hg, 0.39 inHg) for 15 seconds under a vacuum of

−

66.7 kPa (

−

500 mmHg,

−

19.70 inHg).

When connected to the engine side (C):

: Vacuum should not exist.

JPFIA0024ZZ

Revision: 2013 February

2012 MURANO

BR-34

< REMOVAL AND INSTALLATION >

FRONT DISC BRAKE

FRONT DISC BRAKE

BRAKE PAD (1 PISTON TYPE)

BRAKE PAD (1 PISTON TYPE) : Exploded View

INFOID:0000000007543277

BRAKE PAD (1 PISTON TYPE) : Removal and Installation

INFOID:0000000007543278

REMOVAL

WARNING:

Since dust covering the front brake has an affect on human body, the dust must be removed with a
dust collector. Never splatter the dust with an air blow gun.

CAUTION:

• Never depress the brake pedal while removing the brake pads because the piston may pop out.
• Never spill or splash brake fluid on the disc rotor.

Remove tires with power tool.

Remove lower sliding pin bolt.

Suspend the cylinder body with suitable wire so that the brake hose will not stretch. Then remove the
brake pads, shims and shim cover from the torque member.

CAUTION:

• Never reuse the pad retainers when removed the pad retainers from the torque member.
• Never damage the piston boot.
• Never drop the brake pads, shims, and the shim cover.
• Remember each position of the removed brake pads.

INSTALLATION

WARNING:

Since dust covering the front brake has an affect on human body, the dust must be removed with a
dust collector. Never splatter the dust with an air blow gun.

CAUTION:

• Never depress the brake pedal while removing the brake pads or the cylinder body because the pis-

ton may pop out.

Cylinder body

Inner shim

Inner pad (with pad wear sensor)

Pad retainer

Torque member

Outer pad

Outer shim

Outer shim cover

1: Apply PBC (Poly Butyl Cuprysil) grease or silicone-based grease.

2: Apply copper based brake grease.

BR-35, "BRAKE PAD (1 PISTON TYPE) : Inspection"

for symbols not described on the above.

JPFIA0495GB

Revision: 2013 February

2012 MURANO

FRONT DISC BRAKE

BR-35

< REMOVAL AND INSTALLATION >

• Never spill or splash brake fluid on the disc rotor.

Install the pad retainer to the torque member if the pad retainers has been removed.

CAUTION:

• Never reuse the pad retainers.
• Securely assemble the pad retainers so that it will not be lifted up from the torque member.
• Never deform the pad retainers.
• Eliminate double-faced adhesive tape on torque member.
• Remove adhesive's protective liner on pad retainers.

Apply PBC (Poly Butyl Cuprysil) grease or silicone-based grease to the mating faces between the brake
pads and pad retainers.

Apply copper based brake grease to the mating faces between the brake pads, shims and shim covers,
and install them to the brake pad.

CAUTION:

Always replace the shims together with the shim covers when replacing the brake pad.

Install the cylinder body and brake pads to the torque member.

CAUTION:

• Never damage the piston boot.
• When replacing a pad with new one, check a brake fluid level in the reservoir tank because brake

fluid returns to master cylinder reservoir tank when pressing piston in.

NOTE:
Use a disc brake piston tool to easily press piston.

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

Depress the brake pedal several times to check that no drag feel is present for the front disc brake. Refer
to

BRAKE PAD (1 PISTON TYPE) : Inspection

INFOID:0000000007543279

INSPECTION AFTER REMOVAL

Replace the shims and the shim cover if rust is excessively attached.

INSPECTION AFTER INSTALLATION

Check a drag of front disc brake. If any drag is found, follow the procedure described below.

Remove brake pads.

Press the piston.

CAUTION:

• Never damage the piston boot.
• When replacing a pad with new one, check a brake fluid level in the reservoir tank because brake

fluid returns to master cylinder reservoir tank when pressing piston in.

NOTE:
Use a disc brake piston tool to easily press piston.

Install brake pads.

Depress the brake pedal several times.

Check a drag of front disc brake again. If any drag is found, disassemble the cylinder body. Refer to

BR-

39, "BRAKE CALIPER ASSEMBLY (1 PISTON TYPE) : Disassembly and Assembly"

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

BR-15, "BRAKE PAD : Inspection and Adjustment"

BRAKE PAD (2 PISTON TYPE)

Revision: 2013 February

2012 MURANO

BR-36

< REMOVAL AND INSTALLATION >

FRONT DISC BRAKE

BRAKE PAD (2 PISTON TYPE) : Exploded View

INFOID:0000000008713759

BRAKE PAD (2 PISTON TYPE) : Removal and Installation

INFOID:0000000008713760

REMOVAL

WARNING:

Since dust covering the front brake has an affect on human body, the dust must be removed with a
dust collector. Never splatter the dust with an air blow gun.

CAUTION:

• Never depress the brake pedal while removing the brake pads because the piston may pop out.
• Never spill or splash brake fluid on the disc rotor.
1.

Remove tires with power tool.

Remove lower sliding pin bolt.

Suspend the cylinder body with suitable wire so that the brake hose will not stretch. Then remove the
brake pads, shims and shim covers from the torque member.

CAUTION:

• Never reuse the pad retainers when removed the pad retainers from the torque member.
• Never damage the piston boot.
• Never drop the brake pads, shims, and the shim covers.
• Remember each position of the removed brake pads.

INSTALLATION

WARNING:

Since dust covering the front brake has an affect on human body, the dust must be removed with a
dust collector. Never splatter the dust with an air blow gun.

CAUTION:

• Never depress the brake pedal while removing the brake pads or the cylinder body because the pis-

ton may pop out.

• Never spill or splash brake fluid on the disc rotor.

Apply copper based brake grease to the pad retainers before installing it to the torque member if the pad
retainers has been removed.

CAUTION:

Cylinder body

Inner shim cover

Inner shim

Inner pad (with pad wear sensor)

Pad retainer

Torque member

Outer pad (with pad wear sensor)

Outer shim

Outer shim cover

: Apply copper based brake grease.

BR-37, "BRAKE PAD (2 PISTON TYPE) : Inspection"

for symbols not described on the above.

JPFIA0327GB

Revision: 2013 February

2012 MURANO

FRONT DISC BRAKE

BR-37

< REMOVAL AND INSTALLATION >

• Securely assemble the pad retainers so that it will not be lifted up from the torque member.
• Never deform the pad retainers.

Apply copper based brake grease to the mating faces between the shims and shim covers, and install
them to the brake pads.

CAUTION:

Always replace the shims together with the shim covers when replacing the brake pad.

Install the brake pads to the torque member.

CAUTION:

Both inner and outer pads have a pad return system on the
pad retainer. Install pad return lever (1) securely to pad wear
sensor (2).

Install the cylinder body to the torque member.

CAUTION:

• Never damage the piston boot.
• When replacing a pad with new one, check a brake fluid

level in the reservoir tank because brake fluid returns to
master cylinder reservoir tank when pressing piston in.

NOTE:
Use a disc brake piston tool to easily press piston.

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

Depress the brake pedal several times to check that no drag feel is present for the front disc brake. Refer
to

BRAKE PAD (2 PISTON TYPE) : Inspection

INFOID:0000000008713761

INSPECTION AFTER REMOVAL

Replace the shims and the shim covers if rust is excessively attached.

INSPECTION AFTER INSTALLATION

Check a drag of front disc brake. If any drag is found, follow the procedure described below.

Remove brake pads.

Press the piston.

CAUTION:

• Never damage the piston boot.
• When replacing a pad with new one, check a brake fluid level in the reservoir tank because brake

fluid returns to master cylinder reservoir tank when pressing piston in.

NOTE:
Use a disc brake piston tool to easily press piston.

Install brake pads.

Depress the brake pedal several times.

Check a drag of front disc brake again. If any drag is found, disassemble the cylinder body. Refer to

BR-

43, "BRAKE CALIPER ASSEMBLY (2 PISTON TYPE) : Disassembly and Assembly"

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

BR-15, "BRAKE PAD : Inspection and Adjustment"

BRAKE CALIPER ASSEMBLY (1 PISTON TYPE)

BRAKE CALIPER ASSEMBLY (1 PISTON TYPE) : Exploded View

INFOID:0000000007543280

REMOVAL

JPFIA0027ZZ

Revision: 2013 February

2012 MURANO

BR-38

< REMOVAL AND INSTALLATION >

FRONT DISC BRAKE

DISASSEMBLY

BRAKE CALIPER ASSEMBLY (1 PISTON TYPE) : Removal and Installation

INFOID:0000000007543281

REMOVAL

Brake caliper assembly

Hexagon head bolt and washer

Hexagon flange bolt

for symbols not described on the above.

JSFIA1174GB

Cap

Bleeder valve

Cylinder body

Piston seal

Piston

Piston boot

Sliding pin

Sliding pin boot

Bushing

10. Torque member

1: Apply rubber grease.

2: Apply polyglycol ether based lubricant.

: Apply brake fluid.

BR-21, "FRONT : Exploded View"

for symbols not described on the above.

JPFIA0309GB

Revision: 2013 February

2012 MURANO

FRONT DISC BRAKE

BR-39

< REMOVAL AND INSTALLATION >

WARNING:

Since dust covering the front brake has an affect on human body, the dust must be removed with a
dust collector. Never splatter the dust with an air blow gun.

CAUTION:

Never depress the brake pedal. Brake fluid may splash while removing the brake hose.
1.

Remove tires with power tool.

Fix the disc rotor using wheel nuts.

Drain brake fluid. Refer to

BR-11, "Draining"

CAUTION:

Never spill or splash brake fluid on the disc rotor.

Remove union bolt and copper washers, and then disconnect brake hose from caliper assembly. Refer to

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

CAUTION:

Never drop brake pads and caliper assembly.

Remove disc rotor.

CAUTION:

• Put matching marks on the wheel hub and bearing assembly and the disc rotor before removing

the disc rotor.

• Never drop disc rotor.

INSTALLATION

WARNING:

Since dust covering the front brake has an affect on human body, the dust must be removed with a
dust collector. Never splatter the dust with an air blow gun.

CAUTION:

Never depress the brake pedal. Brake fluid may splash while removing the brake hose.

Install disc rotor.

CAUTION:

Align the matching marks put during removal when reusing the disc rotor.

Install the brake caliper assembly to the vehicle and tighten the torque member mounting bolts to the
specified torque.

CAUTION:

Never spill or splash any grease and moisture on the brake caliper assembly mounting face,
threads, mounting bolts and washers. Wipe out any grease and moisture.

Install brake hose and copper washers to brake caliper assembly, and tighten union bolts to the specified
torque. Refer to

BR-21, "FRONT : Exploded View"

CAUTION:

Never reuse copper washer.

Refill with new brake fluid and perform the air bleeding. Refer to