Infiniti G37 Coupe. Manual - part 248

 

  Index      Infiniti     Infiniti G37 Coupe - service repair manual 2008 year

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  246  247  248  249   ..

 

 

Infiniti G37 Coupe. Manual - part 248

 

 

BR-30

< ON-VEHICLE REPAIR >

BRAKE MASTER CYLINDER

BRAKE MASTER CYLINDER

Exploded View

INFOID:0000000001647851

Removal and Installation

INFOID:0000000001647852

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 the master cylinder cover.

2.

Drain brake fluid. Refer to 

BR-11, "Draining"

.

3.

Separate the brake fluid level switch harness connector.

4.

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

CAUTION:

Never scratch the flare nut and the brake tube.

5.

Remove the master cylinder assembly.

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.

1.

Reservoir cap

2.

Oil strainer

3.

Reservoir tank

4.

Brake fluid level switch connector

5.

Cylinder body

6.

Pin

7.

O-ring

8.

Grommet

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

 : Apply brake fluid.

Refer to 

GI-4, "Components"

 for symbols not described on the above.

JPFIA0069GB

BRAKE MASTER CYLINDER

BR-31

< ON-VEHICLE REPAIR >

C

D

E

G

H

I

J

K

L

M

A

B

BR

N

O

P

• 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 installation in the reverse order of removal.

CAUTION:

• 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 mas-
ter cylinder 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

piston. Hold the cylinder body when handling the master cyl-
inder assembly.

• Never reuse the O ring.
• Temporarily tighten the brake tube flare nut to the master cylinder

assembly by hand. Then tighten it to the specified torque with a flare nut crowfoot and torque wrench. Refer
to 

BR-21, "FRONT : Exploded View"

.

CAUTION:

Never scratch the flare nut and the brake tube.

• After installation, perform the air bleeding. Refer to 

BR-12, "Bleeding Brake System"

CAUTION:

Never reuse drained brake fluid.

Disassembly and Assembly

INFOID:0000000001647853

DISASSEMBLY

CAUTION:

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

Fix the master cylinder assembly to a vise.

CAUTION:

Always set copper plates or cloth between them 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.

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.

JPFIA0013ZZ

JPFIA0015ZZ

BR-32

< ON-VEHICLE REPAIR >

BRAKE MASTER CYLINDER

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 them 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 pins.

Inspection

INFOID:0000000001647854

INSPECTION AFTER INSTALLATION

Fluid Leak

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

JPFIA0016ZZ

JPFIA0015ZZ

BRAKE BOOSTER

BR-33

< ON-VEHICLE REPAIR >

C

D

E

G

H

I

J

K

L

M

A

B

BR

N

O

P

BRAKE BOOSTER

Exploded View

INFOID:0000000001647858

Removal and installation

INFOID:0000000001647859

REMOVAL

1.

Remove master cylinder cover.

2.

Remove cowl top. Refer to 

EXT-21, "Exploded View"

.

3.

Remove brake master cylinder assembly. Refer to 

BR-30, "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.

4.

Remove vacuum hose from brake booster. Refer to 

BR-37, "Exploded View"

.

5.

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

6.

Remove nuts on brake booster and brake pedal assembly. Refer
to 

BR-19, "Exploded View"

.

7.

Remove brake booster from dash panel in engine room side.

CAUTION:

Never deform or bend the brake tubes.

INSTALLATION

Note the following, and installation in the reverse order of removal.

CAUTION:

1.

Master cylinder assembly

2.

Brake booster

3.

Lock nut

4.

Gasket

5.

Clevis

Refer to 

GI-4, "Components"

 for symbols in the figure.

JPFIA0241GB

JPFIA0019ZZ

 

 

 

 

 

 

 

Content   ..  246  247  248  249   ..