Infiniti FX35, FX50 (S51). Manual - part 241

 

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Infiniti FX35, FX50 (S51). Manual - part 241

 

 

REAR DISC BRAKE

BR-61

< REMOVAL AND INSTALLATION >

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DISASSEMBLY

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

INFOID:0000000005234220

REMOVAL

WARNING:

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

CAUTION:

1.

Caliper assembly

Refer to 

GI-4, "Components"

 for symbols in the figure.

JPFIA0389GB

1.

Piston

2.

Piston seal

3.

Piston boot

4.

Retaining ring

5.

Cap

6.

Bleeder valve

7.

Cap

8.

Caliper

 1: Apply rubber grease.

: Apply brake fluid.

Refer to 

GI-4, "Components"

 for symbols not described on the above.

JPFIA0390GB

BR-62

< REMOVAL AND INSTALLATION >

REAR DISC BRAKE

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-10, "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.

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-11, "Bleeding Brake System"

.

CAUTION:

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

6.

Check a drag of rear disc brake. If any drag is found, refer to 

BR-64, "BRAKE CALIPER ASSEMBLY (2

PISTON TYPE) : Inspection"

.

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

INFOID:0000000005234221

DISASSEMBLY

1.

Remove brake pads. Refer to 

BR-54, "BRAKE PAD (2 PISTON TYPE) : Exploded View"

.

CAUTION:

Never drop brake pad, shims, shim covers, pad pins and clips.

JPFIA0224ZZ

REAR DISC BRAKE

BR-63

< REMOVAL AND INSTALLATION >

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2.

Remove caliper assembly. Refer to 

BR-60, "BRAKE CALIPER ASSEMBLY (2 PISTON TYPE) : Exploded

View"

.

3.

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.

4.

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.

JPFIA0225ZZ

JPFIA0226ZZ

PFIA0872E

BR-64

< REMOVAL AND INSTALLATION >

REAR DISC BRAKE

2.

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

CAUTION:

Never reuse piston boots.

3.

Apply brake fluid to piston. Push piston into caliper by hand and
push piston boot piston-side lip into the piston groove.

CAUTION:

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

4.

Secure piston boot with retaining ring.

CAUTION:

• Make sure that boot is securely engaged in the groove on

caliper.

• Never reuse retaining ring.

5.

Install the caliper to tighten the caliper mounting bolts to the
specified torque. Refer to 

BR-60, "BRAKE CALIPER ASSEM-

BLY (2 PISTON TYPE) : Exploded View"

.

6.

Install brake pads. Refer to 

BR-54, "BRAKE PAD (2 PISTON

TYPE) : Exploded View"

.

CAUTION:

Never drop brake pads, shims, pad pins and clips.

BRAKE CALIPER ASSEMBLY (2 PISTON TYPE) : Inspection

INFOID:0000000005234222

INSPECTION AFTER DISASSEMBLY

Caliper

Check the inner wall of the caliper for rust, wear, cracks or damage. Replace the caliper if any abnormal con-
dition is detected.

CAUTION:

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

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.

INSPECTION AFTER INSTALLATION

1.

Check a drag of rear disc brake. If any drag is found, follow the procedure described below.

2.

Remove brake pads.

3.

Press the pistons.

CAUTION:

• Never damage the piston boot.
• When replacing a pad with new one, check a brake fluid level in the reservoir tank because brake

fluid returns to master cylinder reservoir tank when pressing piston in.

NOTE:
Use a disc brake piston tool to easily press piston.

4.

Install brake pads.

5.

Depress the brake pedal several times.

6.

Check a drag of rear disc brake again. If any drag is found, disassemble the cylinder body.

7.

Burnish contact surface between disc rotor and brake pads after refinishing or replacing disc rotor, or if a
soft pedal occurs at very low mileage. Refer to 

BR-16, "DISC ROTOR : Inspection and Adjustment"

.

PFIA0906J

 

 

 

 

 

 

 

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