Infiniti G37 Coupe. Manual - part 255

 

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Infiniti G37 Coupe. Manual - part 255

 

 

BR-58

< ON-VEHICLE REPAIR >

REAR DISC BRAKE

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 seal (1), and install them to cylin-
der body.

CAUTION:

Never reuse piston seal.

2.

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

CAUTION:

Never reuse piston boot.

3.

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

CAUTION:

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

4.

Install sliding pin boot to torque member.

5.

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

BRAKE CALIPER ASSEMBLY (1 PISTON TYPE) : Inspection and Adjustment

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INSPECTION AFTER DISASSEMBLY

Cylinder Body

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REAR DISC BRAKE

BR-59

< ON-VEHICLE REPAIR >

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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.

Piston

Check 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 Bolt and Sliding Pin Boot

Check the sliding pin bolts and sliding pin 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 the 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-60

< ON-VEHICLE REPAIR >

REAR 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 and brake tube.

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.

Loosen the flare nut with a flare nut wrench and separate the brake tube from caliper.

CAUTION:

• Cover flare nut wrench with a cloth as not to damage the caliper.
• Never scratch the flare nut and the brake tube.
• Never bend sharply, twist or strongly pull out the brake tube.
• Cover open end of brake tube when disconnecting to prevent entrance of dirt.

5.

Remove brake hose mounting bolt.

6.

Remove caliper mounting bolts, and remove caliper.

CAUTION:

Never drop brake pad and caliper.

7.

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 to the vehicle and tighten the caliper mounting bolts to the specified torque.

1.

Piston

2.

Piston seal

3.

Piston boot

4.

Retaining ring

5.

Cap

6.

Bleeder valve

7.

Cap

8.

Clip

9.

Pad pin

10.

Caliper

11. Inner shim cover

12.

Inner shim

13.

Inner pad

14. Pad wear sensor (RH inner pad 

only)

15.

Cross spring

16.

Outer pad

17. Outer shim

18.

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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REAR DISC BRAKE

BR-61

< ON-VEHICLE REPAIR >

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CAUTION:

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

3.

Install the brake hose mounting bolt to the specified torque.

4.

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

CAUTION:

• Cover crowfoot with a cloth as not to damage the caliper.
• Never scratch the flare nut and the brake tube.

5.

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.

6.

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

7.

Install tires.

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

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DISASSEMBLY

1.

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

CAUTION:

Never get fingers caught in the pistons.

2.

Remove piston seal (1) from cylinder body using suitable tool.

CAUTION:

Be careful not to damage a cylinder inner wall.

ASSEMBLY

1.

Apply brake fluid to piston seals (1), and install them to caliper.

CAUTION:

Never reuse piston seals.

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