Infiniti M45 (Y34). Manual - part 262

FRONT DISC BRAKE

BR-27

●

Minor flaws caused by corrosion or a foreign material can be removed by polishing the surface with a fine
sandpaper. Replace the cylinder body, if necessary.

Torque Member

Check for wear, cracks, and damage. If a malfunction is detected, replace the applicable part.

Piston

CAUTION:

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

Sliding Pin, Pin Bolt, and Pin Boot

Check the sliding pin and sliding pin boot for wear, damage, and cracks. If a malfunction is detected, replace
the applicable part.

ASSEMBLY

CAUTION:

Do not use Nissan Rubber Grease (KRE00 00010, KRE00 00010 01) when assembling.

Apply rubber grease to the piston seals, and install them to the
cylinder body.

CAUTION:

Do not reuse the piston seals.

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

CAUTION:

Do not reuse the piston boot.

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

CAUTION:

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

Install the sliding pins and sliding pin boots to the torque mem-
ber.

Apply grease to the back of the pad and both sides of the shim, install the inner shim to the inner pad, and
the outer shim and outer shim cover to the outer pad.

SFIA2167E

SFIA2168E

SBR574

BR-28

FRONT DISC BRAKE

Apply grease to the pad contact surface on the pad retainer, and
install the pad retainers and pads to the torque member.

CAUTION:

The inner pad and outer pad have the pad-return mecha-
nism on the upper side of the pad retainer. When installing
the CLZ31VA pad to the torque member, be sure to install
the pad return lever to the pad wear sensor securely.

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

DISC ROTOR INSPECTION
Visual Inspection

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

Runout Inspection

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

Using a dial indicator, check the runout.

CAUTION:

Before measuring, make sure that the axle end play is 0 mm
(0 in).

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

Thickness Inspection

Using a micrometer, check the thickness of the disc rotor. If the
thickness is outside the standard, replace the disc rotor.

If the runout is still out of specification, turn rotor with on-car
brake lathe (“MAD, DL-8700”, “AMMCO 700 and 705”or equiva-
lent).

Brake Burnishing Procedure

AFS000KE

Burnish the brake contact surfaces according to the 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:

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

Drive the vehicle on a straight smooth road at 50 km/h (31 MPH).

Use medium brake pedal/foot effort to bring the vehicle to a complete stop from 50 km/h (31 MPH). Adjust
brake pedal/foot pressure such that vehicle stopping time equals 3 to 5 seconds.

To cool the brake system, drive the vehicle at 50 km/h (31 MPH) for 1 minute without stopping.

Repeat steps 1 to 3, 10 times or more to complete the burnishing procedure.

SBR557E

Measurement point:

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

Maximum runout

: 0.07 mm (0.0028 in) or less

SBR019B

Standard thickness

: 28.0 mm (1.10 in)

Wear limit

: 26.0 mm (1.02 in)

Maximum uneven wear (measured at 8 positions):

0.015 mm (0,0006 in) or less

SBR020B

REAR DISC BRAKE

BR-29

REAR DISC BRAKE

PFP:44000

On-Board Inspection

AFS000KL

PAD WEAR INSPECTION

●

Remove the wheel with the vehicle lifted to check the pad thick-
ness from the check hole on the cylinder body. If necessary, use
a scale to check.

Component (AD14VD Type)

AFS000KK

CAUTION:

●

Clean dust on the caliper and brake pad with a vacuum dust collector. Do not blow with com-
pressed air.

●

While removing the cylinder body, never depress the brake pedal because the piston will pop out.

Standard thickness

: 9.8 mm (0.386 in)

Repair limit thickness

: 2.0 mm (0.079 in)

MAA0439D

Union bolt

Copper washer

Brake hose

Copper washer

Sliding pin bolt

Bleed valve

Cylinder body

Piston seal

Piston

10. Piston boot

11.

Retaining ring

12. Inner shim cover

13. Inner shim

14. Inner brake pad

15. Pad retainer

16. Outer brake pad

17. Outer shim

18. Outer shim cover

19. Sliding pin

20. Sliding pin boot

21. Torque member mounting bolts

22. Torque member

23. Cap

SFIA1832E

BR-30

REAR DISC BRAKE

●

It is not necessary to remove the mounting bolts on the torque member and brake hose except for
disassembly or replacement of the caliper assembly. In this case, hang the cylinder body with a
wire so that the brake hose is not under tension.

●

Do not damage the piston boot.

●

Always replace the shims and shim covers as a set when replacing the brake pads.

●

Keep the rotor clean away from brake fluid.

Pad Replacement

AFS000KM

REMOVAL

WARNING:

Clean brake pads with a vacuum dust collector to minimize the hazard of airborne particles or other
materials.

CAUTION:

●

While cylinder body is open, do not depress brake pedal, otherwise piston will pop out.

●

Be careful not to damage piston boot or get oil on rotor. Always replace shims when replacing
pads.

●

If shims are rusted or show peeling of rubber coat, replace them with new shims.

●

It is not necessary to remove connecting bolt except for disassembly or replacement of caliper
assembly. In this case, suspend cylinder body with wire so as not to stretch brake hose.

●

Carefully monitor brake fluid level because brake fluid will return to reservoir when pushing back
piston.

●

Burnish the brake contact surfaces after refinishing or replacing drums or rotor, after replacing
pads or linings, or if a soft pedal occurs at very low mileage. Refer to

BR-34, "Brake Burnishing

Procedure"

Remove tire from vehicle.

Remove master cylinder reservoir cap.

Remove the lower sliding pin bolt.

Hang the cylinder body with a wire, and remove the pads, pad
retainers, shims and shim covers from the torque member.

CAUTION:

●

Do not damage the piston boot.

●

Keep the rotor clean away from brake fluid.

INSTALLATION

Apply grease to the back of the pad and both sides of the shim, and install the inner shim and inner shim
cover to the inner pad, and outer shim and outer shim cover to the pad.

Apply grease to the pad contact surface on the pad retainer, and install the pad retainers and pads to the
torque member.

Install the cylinder body to the torque member.

SBR090C

SBR932C

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