Infiniti G37 Coupe. Manual - part 247

BR-26

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BRAKE PIPING

2 PISTON TYPE

REAR : Hydraulic Piping

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1 PISTON TYPE

JPFIA0237GB

1.

Brake tube

2.

Brake hose

3.

Lock plate

4.

Brake hose bracket

A.

To front brake tube

B.

To rear brake hose

C.

To rear brake tube

Refer to 

GI-4, "Components"

 for symbols in the figure.

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1.

ABS actuator and electric unit (con-
trol unit)

2.

Front disc brake

3.

Master cylinder

4.

Brake booster

5.

Connector

6.

Rear disc brake

A.

Brake hose

B.

Brake tube

 : Flare nut

BRAKE PIPING

BR-27

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2 PISTON TYPE

REAR : Removal and Installation

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REMOVAL

1 Piston Type

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 

BR-11, "Draining"

.

3.

Loosen the flare nut with a flare nut wrench and separate the brake tube from the brake 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 remove the brake hose from the brake caliper assembly.

5.

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

2 Piston Type

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 

BR-11, "Draining"

.

3.

Loosen the flare nut with a flare nut wrench and separate the brake tube from the brake hose and caliper.

CAUTION:

 : Union bolt

 : Connector

JPFIA0211ZZ

1.

ABS actuator and electric unit (con-
trol unit)

2.

Front disc brake

3.

Master cylinder

4.

Brake booster

5.

Connector

6.

Rear disc brake

A.

Brake hose

B.

Brake tube

 : Flare nut

 : Union bolt

 : Connector

BR-28

< ON-VEHICLE REPAIR >

BRAKE PIPING

• Cover flare nut wrench with a cloth as not to damage the caliper.
• 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 brake hose mounting bolt.

5.

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

INSTALLATION

1 Piston Type

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 washer to the brake hose.

CAUTION:

Never reuse copper washer.

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 flare nut crow-
foot 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-12, "Bleeding Brake System"

.

CAUTION:

Never reuse drained brake fluid.

6.

Install tires.

2 Piston Type

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.

Connect the hose to the brake tube, temporarily tighten the flare nut by hand until it does not rotate fur-
ther, 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.

2.

Tighten the brake hose mounting bolt to the specified torque.

3.

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

CAUTION:

• Cover crowfoot with a cloth as not to damage the caliper.
• Never scratch the flare nut and the brake tube.

4.

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

BR-12, "Bleeding Brake System"

.

CAUTION:

Never reuse drained brake fluid.

5.

Install tires.

REAR : Inspection

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INSPECTION AFTER REMOVAL

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.

JPFIA0012ZZ

BRAKE PIPING

BR-29

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2.

Depress the brake pedal with a force of 785 N (80kg, 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.