Murano Cross Cabriolet Z51 (2013 year). Manual — part 15
REAR DISC BRAKE
BR-17
< PERIODIC MAINTENANCE >
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• Check in advance that the thickness of the disc rotor is wear thickness + 0.3 mm (0.012 in) or
more.
• If the thickness is less than wear thickness + 0.3 mm (0.012 in), replace the disc rotor.
Thickness
Check the thickness of the disc rotor using a micrometer. Replace
the disc rotor if the thickness is below the wear limit.
ADJUSTMENT
CAUTION:
• Burnish contact surfaces between pads according to the following procedure after refinishing or
replacing pads, or if a soft pedal occurs at very low mileage.
• Be careful of vehicle speed because the brake does not operate firmly/securely until pads and disc
rotor are securely fitted.
• Only perform this procedure under safe road and traffic conditions. Use extreme caution.
1.
Drive vehicle on straight, flat road.
2.
Depress brake pedal with the power to stop vehicle within 3 to 5 seconds until the vehicle stops.
3.
Drive without depressing brake for a few minutes to cool the brake.
4.
Repeat steps 1 to 3 until pad and disc rotor are securely fitted.
Limit
Wear thickness
: Refer to
.
Limit
Wear thickness
: Refer to
.
Thickness variation
: Refer to
.
SBR020B
Revision: 2012 October
2013 Murano CrossCabriolet
BR-18
< REMOVAL AND INSTALLATION >
BRAKE PEDAL
REMOVAL AND INSTALLATION
BRAKE PEDAL
Exploded View
INFOID:0000000008459945
Removal and Installation
INFOID:0000000008459946
REMOVAL
1.
Remove instrument lower panel LH. Refer to
2.
Remove knee protector. Refer to
ST-31, "Removal and Installation"
3.
Disconnect the stop lamp switch and ASCD brake switch harness connectors.
4.
Remove snap pin and clevis pin from clevis of brake booster.
5.
Remove the brake pedal assembly.
CAUTION:
Hold the brake booster and master cylinder so as not to drop out or contact them to other parts.
INSTALLATION
Note the following, and install the reverse order of removal.
• Apply the multi-purpose grease to the clevis pin and the mating faces. (Not necessary if grease has been
already applied.)
NOTE:
The clevis pin may be inserted in either direction.
1.
Clevis pin
2.
Brake pedal assembly
3.
Brake pedal pad
4.
ASCD brake switch
5.
Stop lamp switch
6.
Clip
7.
Snap pin
: Apply multi-purpose grease.
Refer to
for symbols not described on the above.
JPFIA0440GB
Revision: 2012 October
2013 Murano CrossCabriolet
BRAKE PEDAL
BR-19
< REMOVAL AND INSTALLATION >
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Inspection and Adjustment
INFOID:0000000008459947
INSPECTION AFTER REMOVAL
• Check the following items and replace the brake pedal assembly if
necessary.
- Check the brake pedal upper rivet (made by aluminum) (A) for
deformation.
- Check the brake pedal for bend, damage, and cracks on the
welded parts.
- Check the lapping length (X) of sub-bracket (B) and slide plate (C).
• Check clevis pin and plastic stopper (A) for damage and deforma-
tion. If any damage is found, replace clevis pin.
ADJUSTMENT AFTER INSTALLATION
Perform the brake pedal adjustment after installing the brake pedal assembly. Refer to
.
Standard
X
: 5.0 mm (0.197 in) or more
JPFIA0300ZZ
PFIA0756J
Revision: 2012 October
2013 Murano CrossCabriolet
BR-20
< REMOVAL AND INSTALLATION >
BRAKE PIPING
BRAKE PIPING
FRONT
FRONT : Exploded View
INFOID:0000000008459948
1.
Brake tube
2.
ABS actuator and electric unit (con-
trol unit)
3.
Connector
4.
Connector bracket
5.
Master cylinder assembly
6.
Brake booster
7.
Lock plate
8.
Brake hose
9.
Union bolt
10. Copper washer
A.
To front brake hose
B.
To rear brake tube
Refer to
for symbols in the figure.
JPFIA0297GB
Revision: 2012 October
2013 Murano CrossCabriolet
BRAKE PIPING
BR-21
< REMOVAL AND INSTALLATION >
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FRONT : Hydraulic Piping
INFOID:0000000008459949
FRONT : Removal and Installation
INFOID:0000000008459950
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.
Remove tires with power tool.
2.
Drain brake fluid. Refer to
3.
Loosen the flare nut with a flare nut wrench and separate the brake tube from the hose.
CAUTION:
• Never scratch the flare nut and the brake tube.
• Never bend sharply, twist or strongly pull out the brake hoses and tubes.
• Cover open end of brake tubes and hoses when disconnecting to prevent entrance of dirt.
4.
Remove the union bolt and copper washers, and remove the brake hose from the brake caliper assembly.
5.
Remove the lock plate and remove the brake hose.
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.
1.
Assemble the union bolt and the copper washers to the brake hose.
CAUTION:
Never reuse the copper washer.
1.
ABS actuator and electric unit (con-
trol unit)
2.
Front disc brake
3.
Master cylinder assembly
4.
Brake booster
5.
Connector
6.
Rear disc brake
A.
Brake tube
B.
Brake hose
: Flare nut
: Union bolt
JPFIA0456ZZ
Revision: 2012 October
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BR-22
< REMOVAL AND INSTALLATION >
BRAKE PIPING
2.
Align the brake hose pin to the projection (A) of the brake caliper
assembly and tighten the union bolt (1) to the specified torque.
3.
Install the brake tube to the brake hose, 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 all brake hoses and tubes are not twisted and
bent.
4.
Tighten the flare nut to the specified torque with a crowfoot and
torque wrench.
CAUTION:
Never scratch the flare nut and the brake tube.
5.
Refill with new brake fluid and perform the air bleeding. Refer to
BR-11, "Bleeding Brake System"
.
CAUTION:
Never reuse drained brake fluid.
FRONT : Inspection
INFOID:0000000008459951
INSPECTION AFTER INSTALLATION
1.
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.
2.
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.
REAR
REAR : Exploded View
INFOID:0000000008459952
JPFIA0011ZZ
JPFIA0450GB
Revision: 2012 October
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BRAKE PIPING
BR-23
< REMOVAL AND INSTALLATION >
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REAR : Hydraulic Piping
INFOID:0000000008459953
REAR : Removal and Installation
INFOID:0000000008459954
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.
Remove tires with power tool.
2.
Drain brake fluid. Refer to
3.
Loosen the flare nut with a flare nut wrench and separate the brake tube from the hose.
CAUTION:
• Never scratch the flare nut and the brake tube.
• Never sharply bend, twist or strongly pull the brake hoses and tubes.
• Cover the open end of brake tubes and hoses when disconnecting to prevent entrance of dirt.
4.
Remove the union bolt and copper washers, and remove the brake hose from the brake caliper assembly.
5.
Remove the lock plate and remove the brake hose from the vehicle.
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.
1.
Assemble the union bolt and the copper washers to the brake hose.
CAUTION:
Never reuse copper washer.
1.
Brake tube
2.
Lock plate
3.
Brake hose
4.
Union bolt
5.
Copper washer
A.
To connector
B.
To rear brake hose
C.
To brake tube
Refer to
1.
ABS actuator and electric unit (con-
trol unit)
2.
Front disc brake
3.
Master cylinder assembly
4.
Brake booster
5.
Connector
6.
Rear disc brake
A.
Brake tube
B.
Brake hose
: Flare nut
: Union bolt
JPFIA0456ZZ
Revision: 2012 October
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BR-24
< REMOVAL AND INSTALLATION >
BRAKE PIPING
2.
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.
3.
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.
4.
Tighten the flare nut to the specified torque with a crowfoot and
torque wrench.
CAUTION:
Never scratch the flare nut and the brake tube.
5.
Refill with new brake fluid and perform the air bleeding. Refer to
BR-11, "Bleeding Brake System"
.
CAUTION:
Never reuse drained brake fluid.
REAR : Inspection
INFOID:0000000008459955
INSPECTION AFTER INSTALLATION
1.
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.
2.
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.
JPFIA0012ZZ
Revision: 2012 October
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BRAKE MASTER CYLINDER
BR-25
< REMOVAL AND INSTALLATION >
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BRAKE MASTER CYLINDER
Exploded View
INFOID:0000000008459956
Removal and Installation
INFOID:0000000008459957
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
2.
Separate the brake fluid level switch harness connector.
3.
Remove sub tank and hose.
4.
Remove cowl top cover. Refer to
5.
Remove front wiper drive assembly. Refer to
.
6.
Remove extension cowl top. Refer to
7.
Remove air duct assembly and air cleaner case. Refer to
.
8.
Separate the brake tubes from the master cylinder assembly with a flare nut wrench.
CAUTION:
Never scratch the flare nut and the brake tube.
9.
Remove the master cylinder assembly.
1.
Sub tank cap
2.
Sub tank
3.
Sub tank bracket
4.
Clamp
5.
Hose
6.
Clamp
7.
Reservoir tank
8.
Grommet
9.
Cylinder body
10.
Pin
11.
O-ring
: Apply PBC (Poly Butyl Cuprysil) grease or silicone-based grease.
: Apply brake fluid.
Refer to
for symbols not described on the above.
JPFIA0426GB
Revision: 2012 October
2013 Murano CrossCabriolet
BR-26
< REMOVAL AND INSTALLATION >
BRAKE MASTER CYLINDER
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
BR-20, "FRONT : Exploded View"
CAUTION:
Never scratch the flare nut and the brake tube.
• After installation, perform the air bleeding. Refer to
BR-11, "Bleeding Brake System"
.
CAUTION:
Never reuse drained brake fluid.
Disassembly and Assembly
INFOID:0000000008459958
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.
2.
Remove the reservoir tank mounting pin with a pin punch.
3.
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
1.
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
JPFIA0303ZZ
Revision: 2012 October
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BRAKE MASTER CYLINDER
BR-27
< REMOVAL AND INSTALLATION >
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2.
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.
3.
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.
4.
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:0000000008459959
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
JPFIA0303ZZ
Revision: 2012 October
2013 Murano CrossCabriolet
BR-28
< REMOVAL AND INSTALLATION >
BRAKE BOOSTER
BRAKE BOOSTER
Exploded View
INFOID:0000000008459960
Removal and installation
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REMOVAL
1.
Remove brake master cylinder assembly. Refer to
.
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.
2.
Remove vacuum hose from brake booster. Refer to
.
3.
Remove snap pin (1) and clevis pin (2) from inside vehicle.
4.
Remove nuts on brake booster and brake pedal assembly.
CAUTION:
Hold the brake booster so as to avoid dropping out.
5.
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.
1.
Master cylinder assembly
2.
Brake booster
3.
Lock nut
4.
Clevis
5.
Gasket
Refer to
for symbols in the figure.
JPFIA0425GB
JPFIA0019ZZ
Revision: 2012 October
2013 Murano CrossCabriolet
BRAKE BOOSTER
BR-29
< REMOVAL AND INSTALLATION >
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• Replace the clevis pin if it is damaged. Refer to
BR-19, "Inspection and Adjustment"
• After installation, perform the air bleeding. Refer to
BR-11, "Bleeding Brake System"
.
CAUTION:
Never reuse drained brake fluid.
Inspection and Adjustment
INFOID:0000000008459962
INSPECTION AFTER REMOVAL
Air Tight
CAUTION:
Check the air tight condition when the master cylinder and the brake booster is installed.
1.
With a handy vacuum pump, apply vacuum pressure of –66.7 kPa (–500 mmHg, –19.70 inHg) to the
brake booster.
2.
If the air tight condition cannot be maintained, perform the following operation.
a.
Check the no dirt and dust are present on the brake booster and brake master cylinder mating faces.
Clean it if necessary.
b.
Check O-ring on the master cylinder. If anything is found, replace the O-ring.
c.
Check the air tight condition again. If the condition still cannot be maintained, replace the brake booster.
Input Rod Length Inspection
1.
Loosen the lock nut (1) and adjust the input rod (2) to the speci-
fied length (B).
2.
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
B
: Refer to
.
JPFIA0020ZZ
BRA0037D
Revision: 2012 October
2013 Murano CrossCabriolet
BR-30
< REMOVAL AND INSTALLATION >
BRAKE BOOSTER
• 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
→
B
→
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
.
JPFIA0043ZZ
JPFIA0044ZZ
Revision: 2012 October
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VACUUM LINES
BR-31
< REMOVAL AND INSTALLATION >
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VACUUM LINES
Exploded View
INFOID:0000000008459963
Removal and Installation
INFOID:0000000008459964
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:0000000008459965
INSPECTION AFTER REMOVAL
Appearance
Check for correct assembly, damage and deterioration.
Check Valve Airtightness
1.
Clamp
2.
Vacuum hose (built in check valve)
3.
Vacuum tube
4.
Vacuum hose
A.
To intake manifold
B.
Paint mark
C.
Stamp indicating engine direction
D.
To brake booster
JPFIA0306ZZ
Standard
A
: 24 mm (0.95 in) or more
JPFIA0023ZZ
Revision: 2012 October
2013 Murano CrossCabriolet
BR-32
< REMOVAL AND INSTALLATION >
VACUUM LINES
• 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: 2012 October
2013 Murano CrossCabriolet
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