Infiniti G35 (V35) Sedan. Manual - part 227

FRONT DISC BRAKE

BR-45

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Cylinder Body

Check the inner wall of the cylinder for rust, wear, cracks or damage. Replace the cylinder if any abnormal
condition is detected.

CAUTION:

Always clean with new brake fluid. Never clean with mineral oil such as gasoline and light oil.

Torque Member

• Check the torque member for wear, cracks or damage. Replace the torque member if any abnormal condi-

tion is detected.

• Eliminate rust on the torque member. Replace them if rust is excessively attached.

Piston

Check the surface of the piston for rust, wear, cracks or damage. Replace the piston if any abnormal condition
is detected.

CAUTION:

A piston sliding surface is plated. Never polish with sandpaper.

Location Pin, Protector and Bushing 

Check the location pin, protector and bushing for rust, wear, cracks or damage. Replace the parts if any abnor-
mal condition is detected.

Sliding Pin and Sliding Pin Boot

Check the sliding pin and sliding boots for rust, wear, cracks or damage. Replace the parts if any abnormal
condition is detected.

ADJUSTMENT AFTER INSTALLATION

Brake Burnishing Procedure

Burnish contact surfaces between disc rotors and pads according to following procedure after refinishing or
replacing disc rotor, or if a soft pedal occurs at very low mileage.

CAUTION:

• Be careful of vehicle speed because the brake does not operate easily until pad and disc rotor are

securely fitted.

• Only perform this procedure under safe road and traffic conditions. Use extreme caution.

1.

Drive vehicle on straight, flat road.

2.

Depress brake pedal with the power to stop vehicle within 3 to 5 seconds until the vehicle stops.

3.

Drive without depressing brake for a few minutes to cool the brake.

4.

Repeat steps 1 to 3 until pad and disc rotor are securely fitted.

BRAKE CALIPER ASSEMBLY (2 PISTON TYPE)

BRAKE CALIPER ASSEMBLY (2 PISTON TYPE) : Exploded View

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BR-46

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FRONT DISC BRAKE

BRAKE CALIPER ASSEMBLY (2 PISTON TYPE) : Removal and Installation

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REMOVAL

WARNING:

Clean any dust from the brake caliper and brake pads with a vacuum dust collector. Never blow with
compressed air.

CAUTION:

Never depress the brake pedal. Brake fluid may splash while removing the brake hose.

1.

Remove tires with power tool.

2.

Fix the disc rotor using wheel nuts.

3.

Drain brake fluid. Refer to 

BR-11, "Draining"

.

CAUTION:

Never spill or splash brake fluid on the disc rotor.

4.

Remove union bolt, and then disconnect brake hose from caliper assembly.

5.

Remove torque member mounting bolts, and remove brake cali-
per assembly.

CAUTION:

Never drop brake pad and caliper assembly.

6.

Remove disc rotor.

CAUTION:

• Put matching marks on the wheel hub and bearing assem-

bly and the disc rotor before removing the disc rotor.

• Never drop disc rotor.

INSTALLATION

WARNING:

Clean any dust from the brake caliper and brake pads with a vacuum dust collector. Never blow with
compressed air.

CAUTION:

Never depress the brake pedal. Brake fluid may splash while removing the brake hose.

1.

Install disc rotor.

CAUTION:

Align the matching marks that have been made during removal when reusing the disc rotor.

2.

Install the brake caliper assembly to the vehicle and tighten the torque member mounting bolts to the
specified torque.

CAUTION:

Never spill or splash any grease and moisture on the brake caliper assembly mounting face,
threads, mounting bolts and washers. Wipe out any grease and moisture.

3.

Install brake hose to brake caliper assembly, and tighten union bolts to the specified torque.

1.

Brake hose

2.

Union bolt

3.

Copper washer

4.

Cap

5.

Bleeder valve

6.

Cylinder body

7.

Piston seal

8.

Piston

9.

Piston boot

10.

Sliding pin

11.

Sliding pin boot

12.

Bushing

13.

Torque member

14.

Inner shim cover

15.

Inner shim

16.

Inner pad

17.

Pad wear sensor

18.

Pad retainer

19.

Outer pad

20.

Outer shim

21.

Outer shim cover

1: Apply rubber grease.

2: Apply copper based brake grease.

: Apply brake fluid.

Refer to 

GI-4, "Components"

 for symbols not described on the above.

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FRONT DISC BRAKE

BR-47

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4.

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

BR-12, "Bleeding Brake System"

.

CAUTION:

• Never reuse drained brake fluid.
• Never spill or splash brake fluid on the disc rotor.

5.

Check that no drag feel is present for the front disc brake.

6.

Install tires.

BRAKE CALIPER ASSEMBLY (2 PISTON TYPE) : Disassembly and Assembly

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DISASSEMBLY

NOTE:
The torque member, brake pads, shims, shim covers and pad retainers never need to be removed when dis-
assembling and assembling the cylinder body.
1.

Remove the sliding pin bolt, and remove the cylinder body from the torque member.

CAUTION:

Never drop pads, shims, shim covers and pad retainers from torque member.

2.

Remove sliding pins and sliding pin boots from torque member.

3.

Place a wooden block as shown in the figure, and blow air from
union bolt mounting hole to remove pistons and piston boots.

CAUTION:

Never get fingers caught in the pistons.

4.

Remove piston seal from cylinder body using suitable tool.

CAUTION:

Be careful not to damage a cylinder inner wall.

ASSEMBLY

1.

Apply rubber grease to piston seals (1), and install them to cylin-
der body.

CAUTION:

Never reuse piston seals.

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BR-48

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FRONT DISC BRAKE

2.

Apply rubber grease to piston boots (1). Cover the piston (2) end
with piston boot, and then install cylinder side lip on piston boot
securely into a groove on cylinder body.

CAUTION:

Never reuse piston boots.

3.

Apply brake fluid to pistons (1). Push piston into cylinder body
by hand and push piston boot (2) piston-side lip into the piston
groove.

CAUTION:

Press the pistons evenly and vary the pressing point to pre-
vent cylinder inner wall from being rubbed.

4.

Install sliding pins and sliding pin boots to torque member.

5.

Install the cylinder body to the torque member and tighten the sliding pin bolts to the specified torque.

BRAKE CALIPER ASSEMBLY (2 PISTON TYPE) : Inspection and Adjustment

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INSPECTION AFTER DISASSEMBLY

Cylinder Body

Check the inner wall of the cylinder for rust, wear, cracks or damage. Replace the cylinder if any abnormal
condition is detected.

CAUTION:

Always clean with new brake fluid. Never clean with mineral oil such as gasoline and light oil.

Torque Member

Check the torque member for rust, wear, cracks or damage. Replace the member if any abnormal condition is
detected.

Pistons

Check the surface of the piston for rust, wear, cracks or damage. Replace the piston if any abnormal condition
is detected.

CAUTION:

A piston sliding surface is plated. Never polish with sandpaper.

Sliding Pin and Sliding Pin Boot

Check the sliding pins and sliding boots for rust, wear, cracks or damage. Replace the parts if any abnormal
condition is detected.

ADJUSTMENT AFTER INSTALLATION

Brake Burnishing Procedure

Burnish contact surfaces between disc rotors and pads according to following procedure after refinishing or
replacing disc rotor, or if a soft pedal occurs at very low mileage.

CAUTION:

• Be careful of vehicle speed because the brake does not operate easily until pad and disc rotor are

securely fitted.

• Only perform this procedure under safe road and traffic conditions. Use extreme caution.

1.

Drive vehicle on straight, flat road.

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