Nissan March K13. Manual - part 37

 

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Nissan March K13. Manual - part 37

 

 

BRAKE PIPING

BR-21

< REMOVAL AND INSTALLATION >

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REAR : Hydraulic Piping

INFOID:0000000005986586

REAR : Removal and Installation

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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.

2.

Drain brake fluid. Refer to 

BR-9, "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 lock plate and remove the brake hose from the vehicle.

5.

Loosen the flare nut with a flare nut wrench and separate the brake tube from the wheel cylinder, and
remove the brake tube.

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.

• Never allow foreign matter (e.g. dust) and oils other than brake fluid to enter the reservoir tank.
1.

Connect the brake tube to the wheel cylinder, temporarily tighten the flare nut by hand until it does not
rotate further.

2.

Connect the brake 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.

3.

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

CAUTION:

1.

Brake booster

2.

Master cylinder

3.

Front disc brake

4.

Dual proportioning valve

5.

Rear drum brake

A.

Brake tube

B.

Brake hose

: Flare nut

: Union bolt

JPFIA0757ZZ

BR-22

< REMOVAL AND INSTALLATION >

BRAKE PIPING

Never scratch the flare nut and the brake tube.

4.

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

BR-10, "Bleeding Brake System"

.

CAUTION:

Never reuse drained brake fluid.

5.

Install tires.

REAR : Inspection

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INSPECTION AFTER INSTALLATION

1.

Check the brake hoses and tubes for the following: no scratches; no twist and deformation; no looseness
at connections.

CAUTION:

Clearance with brake hose and each parts being secured more than 10mm in unladen condition

*

.

*: Fuel, engine coolant and lubricant are full. Spare tire, jack, hand tools and mats are in desig-
nated positions.

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.

DUAL PROPORTIONING VALVE

BR-23

< REMOVAL AND INSTALLATION >

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DUAL PROPORTIONING VALVE

Exploded View

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Removal and Installation

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REMOVAL

1.

Remove the air duct and air cleaner case. Refer to 

EM-24, "Removal and Installation"

 

2.

Drain brake fluid. Refer to 

BR-9, "Draining"

.

3.

Loosen the brake tube flare nuts, and then remove brake tubes from dual proportioning valve. Refer to

BR-18, "FRONT : Exploded View"

.

CAUTION:

Never scratch the flare nut and the brake tube.

4.

Remove the dual proportioning valve from bracket.

CAUTION:

Never apply excessive impact to dual proportioning valve, such as dropping it.

5.

Remove the bracket from vehicle.

INSTALLATION

Note the following, and install in the reverse order of removal.
• Install the brake tube with flare nut torque wrench. Refer to 

BR-18, "FRONT : Exploded View"

.

CAUTION:

Never scratch the flare nut and the brake tube.

• Never apply excessive impact to dual proportioning valve, such as dropping it.
• After work is completed, bleed air from brake tube. Refer to 

BR-10, "Bleeding Brake System"

.

1.

Dual proportioning valve

2

Clip

3.

Bracket

A.

To rear LH wheel cylinder

B.

To master cylinder primary side

C.

To front RH brake caliper

D.

To front LH brake caliper

E.

To master cylinder secondary side

F.

To rear RH wheel cylinder

: Vehicle front

Refer to 

GI-4, "Components"

 for symbols in the figure.

JPFIA0759GB

BR-24

< REMOVAL AND INSTALLATION >

DUAL PROPORTIONING VALVE

Inspection

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1.

Connect brake fluid pressure gauge to bleeder valve of front and
rear brake on either LH and RH side.

2.

Refill with new brake fluid and perform the air bleeding from
brake fluid pressure gauge.

3.

Check brake fluid pressure by depressing the brake pedal
according to the following steps.

a.

Raise front brake fluid pressure to the following value.

b.

Check that the value of rear brake fluid pressure is as follows.

CAUTION:

• The difference between right and left rear brake fluid pressure must be less than 0.39 MPa (3.9

bar, 4 kg/cm

2

, 57 psi).

• If the difference between light and left rear brake fluid pressure is more than 0.39 Mpa (3.9 bar, 4

kg/cm

2

, 57 psi), replace dual proportioning valve.

4.

Check brake fluid pressure by depressing the brake pedal according to the following steps.

a.

Raise front brake fluid pressure to the following value.

b.

Check that the value of rear brake fluid pressure is as follows.

CAUTION:

If brake fluid pressure is outside the reference value, replace dual proportioning valve.

5.

Check that brake fluid pressure does not decrease when depressing brake pedal for 15 seconds with
brake fluid pressure (front) reached 14.71 MPa (147.1 bar, 150 kg/cm

2

, 2133 psi).

CAUTION:

If brake fluid pressure decreases, check if there is leakage of brake fluid or damage.

6.

Remove the brake pressure gauge.

7.

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

BR-10, "Bleeding Brake System"

.

Front brake fluid pressure

: 4.90 MPa (49.0 bar, 50.0 

kg/cm

2

, 711 psi)

Rear brake fluid pressure

: 3.07 MPa (30.7 bar, 31.3 kg/cm

2

, 445 psi)

Front brake fluid pressure

: 9.81 MPa (98.1 bar, 100.1 kg/cm

2

, 1422 psi)

Rear brake fluid pressure

: 4.30 MPa (43.0 bar, 43.9 kg/cm

2

, 624 psi)

SBR822BA

 

 

 

 

 

 

 

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