Infiniti M45 (Y34). Manual - part 258

BRAKE PIPING AND HOSE

BR-11

C

D

E

G

H

I

J

K

L

M

A

B

BR

BRAKE PIPING AND HOSE

PFP:46210

Hydraulic Circuit

AFS000K2

CAUTION:

●

When installing, check for twist and fracture.

●

Make sure that there is no interference with other parts when turning the steering clockwise or
counterclockwise.

●

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

Front Brake Piping and Hose

AFS000K3

REMOVAL

1.

Connect a vinyl tube to the bleed valve.

2.

Drain brake fluid gradually from the bleed valve of each wheel
while depressing the brake pedal. Refer to 

BR-9, "Drain and

Refill"

 .

3.

Cover the brake line connection to prevent foreign material such
as dust or dirt from entering into the connection.

4.

Using a flare nut wrench, remove the brake tube from the brake
hose. Remove the union bolt, and remove the brake hose from
the caliper assembly.

5.

Remove the lock plate.

6.

Remove the mounting nuts, and remove the brake hose from
the vehicle.

INSTALLATION

1.

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

CAUTION:

●

Do not reuse the copper washer.

2.

Install the brake hose to the brake tube on the vehicle, and temporarily tighten the flare nut by hand until it
stops to install the bracket. Fix it with the lock plate, and tighten it to the specified torque.

3.

Install the brake hose to the vehicle, and tighten the mounting nuts to the specified torque.

4.

After the work, bleed air. Refer to 

BR-9, "Bleeding Brake System"

 .

SFIA2233E

SFIA2234E

BR-12

BRAKE PIPING AND HOSE

Rear Brake Piping and Hose

AFS000K4

REMOVAL

1.

Connect a vinyl tube to the bleed valve.

2.

Drain brake fluid gradually from the bleed valve of each wheel
while depressing the brake pedal. Refer to 

BR-9, "Drain and

Refill"

3.

Cover the brake line connection to prevent foreign material such
as dust or dirt from entering into the connection.

4.

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

5.

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

6.

Remove the brake hose from the vehicle.

INSTALLATION

1.

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

CAUTION:

●

Do not reuse the copper washer.

●

Refill with new brake fluid “DOT 3”.

●

Never reuse drained brake fluid.

2.

Fix the brake hose to the vehicle. Temporarily tighten the flare nut by hand until it stops, and tighten it to
the specified torque.

3.

After the work, bleed air. Refer to 

BR-9, "Bleeding Brake System"

 .

Inspection

AFS000K5

CAUTION:

If leak is detected at the connections, retighten it or replace the damaged part if necessary.

1.

Check the hose, tube, and connections for fluid leaks, damage, twist, deformation, contact with other
parts, and loose connections.

2.

While depressing the pedal under the force of 785 N (80 kg, 177 lb) with the engine running for approxi-
mately 5 seconds, check for fluid leak from each part.

PFIA0006E

BRAKE MASTER CYLINDER

BR-13

C

D

E

G

H

I

J

K

L

M

A

B

BR

BRAKE MASTER CYLINDER

PFP:46010

Components

AFS000O0

Removal and Installation

AFS000O1

REMOVAL

1.

Drain brake fluid. Refer to 

BR-9, "Drain and Refill"

 .

2.

Remove the harness connectors for the fluid level sensor and pressure sensor (with ICC models).

3.

Using a flare nut wrench, remove the brake tube from the master cylinder.

4.

Remove the mounting nuts, and remove the master cylinder assembly from the vehicle.

INSTALLATION

CAUTION:

●

Refill with new brake fluid “DOT3”.

●

Never reuse drained brake fluid.

1.

Temporarily tighten the flare nuts on the brake tube to master cylinder by hand.

2.

Install the master cylinder to the brake booster assembly, and tighten the mounting nuts to the specified
torque.

1.

Reservoir cap

2.

Oil filter

3.

Reservoir tank

4.

Seal

5.

Piston stopper

6.

Pin

7.

Cylinder body

8.

O-ring

9.

Piston stopper

10. Pressure sensor

11.

O-ring

12.

Secondary piston assembly

13. Primary piston assembly

14. Plate

15.

Guide assembly

16. Plate (Models with ICC)

17. Snap ring

SFIA2164E

BR-14

BRAKE MASTER CYLINDER

CAUTION:

●

Do not damage and stain the rod of the primary piston.

●

Do not reuse the O-ring seal, and primary piston.

●

Apply silicon grease for the O-ring seal and primary pis-
ton.

3.

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

4.

Refill the new brake fluid and bleed air. Refer to

BR-9, "Bleeding Brake System"

 .

Disassembly and Assembly

AFS000O2

DISASSEMBLY
Models without ICC

CAUTION:

Be careful not to damage the primary piston rod. Covering with cloth is recommended.
1.

Tighten the flange of the cylinder body in the vise as shown in
the figure.

CAUTION:

●

Pay attention to the orientation of master cylinder body.

●

Use a copper plate or cloth for fixing the body in the vise.

2.

Using the pin-punch [commercial service tool: approx. 4 mm
(0.16 in) dia.], remove pin from the reservoir tank.

3.

Remove the master cylinder assembly from the vise.

4.

Remove the reservoir tank and grommet from the cylinder body.

SFIA2165E

: 15 - 17 N·m (1.5 - 1.8 kg-m, 11 - 12 ft-lb)

BRA0558D

BRA0559D