Infiniti FX35 / FX45. Manual - part 251

FRONT DISC BRAKE

BR-21

< SERVICE INFORMATION >

Remove sliding pins and sliding pin boots from torque member.

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.

Using a flat-bladed screwdriver, remove piston seal 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 the inner wall of cylinder for corrosion, wear, and damage. If a malfunction is detected, replace cylin-

der body.

• Minor flaws caused by corrosion or a foreign material can be removed by polishing a surface of the inner

wall with a fine sandpaper. Replace cylinder body, if necessary.

Torque Member

Check for wear, cracks, and damage. If a malfunction is detected, replace the torque member.

Piston

CAUTION:

The piston sliding surface is plated. Do not polish with sandpaper.
Check piston surface for corrosion, wear, and damage. If a malfunction is detected, replace applicable part.

Sliding Pin, Sliding Pin Bolt, and Sliding Pin Boot

Check sliding pins, sliding pin bolts and sliding pin boots for wear, damage, and cracks. If a malfunction is
detected, replace applicable part.

ASSEMBLY

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

CAUTION:

Do not reuse piston seal.

BRB0032D

SFIA0141E

SFIA2920E

BR-22

< SERVICE INFORMATION >

FRONT DISC BRAKE

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

CAUTION:

Do not reuse piston boot.

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 vary the pressing point to prevent
cylinder inner wall from being rubbed.

Install sliding pins and sliding pin boots to torque member.

Install the torque member to the knuckle spindle and tighten the
mounting bolts to the specified torque. Refer to

BR-18, "Compo-

nent"

CAUTION:

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

Install pad retainers to torque member.

After assembling shims and shim covers to pad, install it to
torque member.

CAUTION:

Inner pad and outer pad have pad-return mechanism on the
upper side of the pad retainer. When installing pad, be sure to install pad return lever to pad wear
sensor securely as shown in the figure.

Install cylinder body, and tighten sliding pin bolt to specified torque. Refer to

BR-18, "Component"

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

BR-10, "Hydraulic Circuit"

CAUTION:

• Assemble brake hose securely to protrusions on cylinder body.
• Do not reuse copper washer for union bolts.

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 surface of disc rotor for uneven wear, cracks, and serious damage. If any of them is detected, replace
applicable part.

Runout Inspection

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

SFIA2432E

SFIA2279E

SBR557E

FRONT DISC BRAKE

BR-23

< SERVICE INFORMATION >

Using a dial indicator, check runout.

CAUTION:

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

FAX-4, "On-Vehicle

Inspection"

(2WD models),

FAX-11, "On-Vehicle Inspection"

(AWD models).

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

If runout is still outside the limit after performing the above operation, replace or lathe the disc rotor.
[When lathing, use the Pro-Cut PFM On-Car Brake Lathe (Tool No, 38-PFM90.5) or equivalent.]

Thickness Inspection

Using a micrometer, check thickness of disc rotor. If thickness is out-
side the specification, replace disc rotor.

Brake Burnishing Procedure

INFOID:0000000001327632

Burnish brake pad contact surfaces of disc rotor according to following procedure after refinishing or replacing
drums or rotors, after replacing pads or linings, or if a soft pedal occurs at very low mileage.

CAUTION:

• Be careful of vehicle speed because 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.

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

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

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

Measurement point

: At a point 10.0 mm (0.394 in)
from outer edge of disc.

Runout limit

: 0.04 mm (0.0016 in) or less

SBR019B

Standard thickness

: 34.0 mm (1.339 in)

Wear limit

: 32.0 mm (1.260 in)

Maximum uneven wear
(measured at 8 positions)

: 0.015 mm (0.0006 in)
or less

SBR020B

BR-24

< SERVICE INFORMATION >

REAR DISC BRAKE

REAR DISC BRAKE

On-Vehicle Inspection

INFOID:0000000001327633

PAD WEAR INSPECTION

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

for inspection if necessary.

Component

INFOID:0000000001327634

Standard thickness

: 8.5 mm (0.335 in)

Repair limit thickness

: 2.0 mm (0.079 in)

BRA0010D

Union bolt

Brake hose

Copper washer

Cap

Bleed valve

Sliding pin bolt

Cylinder body

Piston seal

Piston

10.

Piston boot

11. Retaining ring

12. Inner shim cover

13.

Inner shim

14. Inner pad

15. Pad retainer

16.

Outer pad

17. Outer shim

18. Sliding pin boot

19.

Bushing

20. Torque member mounting bolt

21. Washer

22.

Torque member

23. Pad wear sensor

24. Inner pad (RH)

PFIA0808J

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