Infiniti FX35 / FX45. Manual - part 252

 

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Infiniti FX35 / FX45. Manual - part 252

 

 

REAR DISC BRAKE

BR-25

< SERVICE INFORMATION >

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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:

• 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, hang cylinder body with a 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 if a soft

pedal occurs at very low mileage. Refer to 

BR-29, "Brake Burnishing Procedure"

.

Removal and Installation of Brake Pad

INFOID:0000000001327635

REMOVAL

1.

Remove tires from vehicle with power tool.

2.

Remove sliding pin bolt (one on top).

3.

Suspend cylinder body with a wire, and remove pads, pad retainers, shim from torque member. 

INSTALLATION

1.

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

2.

Install pad retainer and mount pad assemblies to torque member.

3.

Push piston in so that pad is firmly installed and mount 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 sliding pin bolt (one on top) and tighten to the specified torque. Refer to 

BR-24, "Component"

.

5.

Check brake for drag.

6.

Install tires to the vehicle.

Removal and Installation of Brake Caliper Assembly

INFOID:0000000001327636

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"

.

4.

Remove union bolt 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

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.

PFIA0413E

BR-26

< SERVICE INFORMATION >

REAR DISC BRAKE

CAUTION:

• Refill with new brake fluid “DOT 3”.
• 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 the vehicle, and tighten bolts to the specified torque. Refer to 

BR-24, "Compo-

nent"

.

CAUTION:

Before installing caliper assembly to the vehicle, wipe off oil and grease on washer seats on axle
assembly and mounting surface of caliper assembly.

3.

Install brake hose to caliper assembly and tighten union bolt to the specified torque. Refer to 

BR-24,

"Component"

.

CAUTION:

• Do not reuse copper washer for union bolts.
• Securely install brake hose to protrusion 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 the vehicle.

Disassembly and Assembly of Brake Caliper Assembly

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

DISASSEMBLY

1.

Remove sliding pin bolts, and then remove brake pads, shims, shim cover, and pad retainer from torque
member and cylinder.

CAUTION:

Do not drop brake pads, shims, shim cover and pad retainer from torque member.

2.

Remove sliding pin boot from torque member.

3.

As shown in the figure, using a flat-bladed screwdriver, remove
retaining ring from cylinder body.

4.

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

CAUTION:

Do not get your fingers caught in piston.

SBR028A

BRD0041D

REAR DISC BRAKE

BR-27

< SERVICE INFORMATION >

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5.

Using a flat-bladed screwdriver, remove piston seals from cylin-
der body.

CAUTION:

Be careful not to damage cylinder inner wall.

INSPECTION AFTER DISASSEMBLY

Cylinder Body

CAUTION:

• Use new brake fluid to clean. Do not use mineral oils such as gasoline or kerosene. 
• Check inside surface of cylinder for score, rust wear, damage or foreign materials. If any of the

above conditions are observed, replace cylinder body.

• Minor damage from rust or foreign materials may be eliminated by polishing surface with a fine

emery paper. Replace cylinder body if necessary.

Torque Member

Check for wear, cracks, and damage. If damage or deformation is present, replace the torque member.

Piston

CAUTION:

• Piston sliding surface is plated, do not polish with emery paper even if rust of foreign materials are

stuck to sliding surface.

• Check piston for score, rust, wear, damage or presence of foreign materials. Replace if any of the

above condition are observed. 

Sliding Pin Bolts and Sliding Pin Boots

Check sliding pin bolts and sliding pin boots, for wear, damage and cracks. If damage or deformation is
present, replace the applicable part.

ASSEMBLY

1.

Apply polyglycol ether based lubricant to the piston seal, and
install them to the cylinder body.

CAUTION:

Do not reuse piston seal.

2.

Apply rubber grease to piston boots. Cover the piston end with
piston boot, and install cylinder side lip on piston boots properly
into groove on cylinder body.

CAUTION:

Do not reuse piston boot.

SFIA0999E

SFIA2278E

SFIA2498E

BR-28

< SERVICE INFORMATION >

REAR DISC BRAKE

3.

Apply brake fluid to piston, and press piston into cylinder body
by hand to assemble piston side lip on piston boot properly into
groove on piston.

CAUTION:

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

4.

Fix piston boot with retaining ring.

CAUTION:

• Make sure boot is firmly in cylinder body groove.
• Do not reuse retaining ring.

5.

Install sliding pin bolts and sliding pin boots to torque member.

6.

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

7.

Assembling shims and shim cover to pad.

CAUTION:

When attaching pad retainer, install it firmly so that it does
not float up higher than torque member, as shown in the fig-
ure.

8.

Install brake pad retainer and pad to torque member.

9.

Install cylinder body. Tighten sliding pin bolts to the specified
torque. Refer to 

BR-24, "Component"

.

10. After installing caliper assembly, refill with new brake fluid and

bleed air. Refer to 

BR-8, "Bleeding Brake System"

.

DISC ROTOR INSPECTION

Visual Inspection

Check surfaces of disc rotor for uneven wear, cracks, and serious damage. If a malfunction is detected,
replace applicable part.

Runout Inspection

1.

Using wheel nuts, fix the disc rotor to wheels hub. (2 or more positions)

2.

Using a dial indicator, check runout.

CAUTION:

Before measuring, make sure that wheel bearing axle end
play is within the specification. Refer to 

RAX-6, "On-Vehicle

Inspection"

.

3.

If runout is outside the limit, find minimum runout point by shift-
ing mounting positions of disc rotor and wheel hub by one hole.

SFIA2279E

SFIA2280E

PFIA0273E

Measurement point

: At a point 10 mm (0.394 in) 
from outer edge of disc.

Runout limit

: 0.05 mm (0.0020 in) or less

SBR019B

 

 

 

 

 

 

 

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