Infiniti FX35 / FX45. Manual - part 250

VACUUM LINES

BR-17

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Airtightness Inspection

Use a handy vacuum pump to check.

When connected to booster side (1):

 Vacuum decrease should be within 1.3 kPa 
(10 mmHg, 0.39 inHg) for 15 seconds under a 
vacuum of –66.7 kPa (–500 mmHg, –19.69 in-
Hg)

When connected to engine side (2):

 No vacuum will be applied

SFIA1306E

BR-18

< SERVICE INFORMATION >

FRONT DISC BRAKE

FRONT DISC BRAKE

On-Vehicle Inspection

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PAD WEAR INSPECTION

• Check the thickness from check hole on cylinder body. Use a scale

for inspection if necessary.

Component

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WARNING:

Clean dust on caliper and brake pad with a vacuum dust collector to minimize the hazard of airborne
particles or other materials.

CAUTION:

Standard thickness

: 11.0 mm (0.433 in)

Repair limit thickness

: 2.0 mm (0.079 in)

MAA0439D

1.

Brake hose

2.

Union bolt

3.

Copper washer

4.

Cap

5.

Bleed valve

6.

Sliding pin bolt

7.

Cylinder body

8.

Piston seal

9.

Piston

10.

Piston boot

11.

Torque member mounting bolt

12. Sliding pin

13.

Sliding pin boot

14. Bushing

15. Torque member

16.

Inner shim cover

17. Inner shim

18. Inner pad

19.

Pad wear sensor

20. Pad retainer

21. Outer pad

22.

Outer shim

23. Outer shim cover

Refer to 

GI-8, "Component"

 and the followings for the symbols in the figure.

1: Apply rubber grease.

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

3: Apply polyglycol ether based lubricant.

: Apply brake fluid.

PFIA0809E

FRONT DISC BRAKE

BR-19

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• While removing cylinder body, never depress brake pedal because piston will pop out. 
• It is not necessary to remove bolts on torque member and brake hose except for disassembly or

replacement of caliper assembly. In this case, suspend cylinder body with wire so as not to stretch
brake hose.

• Do not damage piston boot.
• If any shim is subject to serious corrosion, replace it with a new one.
• Always replace shims and shim covers as a set when replacing brake pads.
• Keep rotor clean, from brake fluid.
• Burnish brake contact surface after refinishing or replacing rotors, after replacing pads, or it a soft

pedal occurs at very low mileage. Refer to 

BR-23, "Brake Burnishing Procedure"

.

Removal and Installation of Brake Pad

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REMOVAL

1.

Remove tires from vehicle with power tool.

2.

Remove lower sliding pin bolt.

3.

Hang cylinder body with a wire, and remove pads, pad retainers,
shims from torque member.

CAUTION:

When removing pad retainer from torque member, lift pad
retainer in the direction shown by arrow (shown in the fig-
ure) so as not to deform it.

INSTALLATION

1.

Apply PBC (Poly Butyl Cuprysil) or silicone-based grease to the
both sides of inner shim and outer shim, install inner shim and
inner shim cover to inner pad, and outer shim and outer shim
cover to outer pad.

2.

Apply PBC (Poly Butyl Cuprysil) or silicone-based grease to pad
contact surface on pad retainers, and install pad retainers and
pads to torque member.

CAUTION:

Inner pad and outer pad have pad-return mechanism on
upper side of pad retainer. When installing pad to torque
member, be sure to install pad return lever to pad wear sen-
sor securely.

3.

Install cylinder body to torque member.

CAUTION:

When replacing pads with new ones, press in piston until pads can be installed. In this case, care-
fully monitor brake fluid level in reservoir tank because brake fluid will return to master cylinder
reservoir tank.

4.

Install lower sliding pin bolt, and tighten it to the specified torque. Refer to 

BR-18, "Component"

.

5.

Secure disc rotor with wheel nuts. Depress brake pedal a few times until it gets a responsive touch.

6.

Check brake for drag.

7.

Install tires to vehicle.

Removal and Installation of Brake Caliper Assembly

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REMOVAL

1.

Remove tires from vehicle with power tool.

2.

Fasten disc rotor using wheel nut.

3.

Drain brake fluid. Refer to  

BR-8, "Drain and Refill"

.

SBR556E

SBR557E

BR-20

< SERVICE INFORMATION >

FRONT DISC BRAKE

4.

Remove union bolts and torque member bolts, and remove
brake caliper assembly from the vehicle.

5.

Remove disc rotor.

CAUTION:

Put matching marks on both disc rotor and wheel hub when
removing disc rotor.

INSTALLATION

CAUTION:

• Refill with new brake fluid “DOT3”.
• Do not reuse drained brake fluid.

1.

Install disc rotor.

CAUTION:

Align the matching marks of disc rotor and wheel hub, which were marked at the time of removal
when reusing disc rotor.

2.

Install caliper assembly to vehicle, and tighten mounting bolts to the specified torque. Refer to 

BR-18,

"Component"

.

CAUTION:

Before installing torque member to vehicle, wipe oil and grease on washer seats on steering
knuckle and mounting surface of torque member.

3.

Install a projection of brake hose metal fitting by aligning with protrusions on cylinder body, and tighten
union bolts to the specified torque. Refer to 

BR-18, "Component"

.

CAUTION:

• Do not reuse copper washer for union bolts.
• Assemble brake hose securely on caliper assembly.

4.

After installing caliper assembly, refill with new brake fluid and bleed air. Refer to 

BR-8, "Bleeding Brake

System"

.

5.

Install tires to vehicle.

Disassembly and Assembly of Brake Caliper Assembly

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NOTE:
Do not remove torque member, brake pads, shims, shim covers and pad retainers, when disassembling or
assembling cylinder body.

DISASSEMBLY

1.

Remove caliper assembly from vehicle. Refer to 

BR-19,

"Removal and Installation of Brake Caliper Assembly"

.

2.

Remove sliding pin bolts from cylinder body, and remove pads,
shims, shim covers and pad retainers from torque member.

CAUTION:

When removing pad retainer from torque member, lift the
pad retainer in the direction shown by arrow (shown in the
figure) so as not to deform it.

SFIA0140E

SBR556E