Infiniti M35/M45 Y50. Manual — part 323
FRONT DISC BRAKE
BR-27
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DISC ROTOR INSPECTION
Visual Inspection
Check surface of disc rotor for uneven wear, cracks, and serious damage. Replace if there are.
Runout Inspection
1.
Fix disc rotor to wheel hub using wheel nuts (2 or more posi-
tions).
2.
Inspect runout using a dial gauge. [Measured at 10 mm (0.39 in)
inside the disc edge.]
NOTE:
Before measuring, make sure that wheel bearing axial end play
is within the specification. Refer to
.
3.
When runout exceeds limit value, displace mounting positions of
disc rotor by one hole. And then find a position of the minimum value for runout.
4.
Replace or lathe disc rotor if runout is outside the specified value after performing the above operation.
(“MAD DL-8700”, “AMMCO 700 and 705” or equivalent.)
Thickness Inspection
Check thickness of the disc rotor using a micrometer. Replace disc
rotor if thickness is under the wear limit.
BRAKE BURNISHING PROCEDURE
Burnish contact surfaces between disc rotors and pads according to following procedure after refinishing or
replacing rotors, after replacing pads, 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.
Runout limit
: 0.035 mm (0.0014 in)
(with it attached to the vehicle)
BRA0580D
Standard thickness
: 28.0 mm (1.102 in)
Wear limit
: 26.0 mm (1.024 in)
Thickness variation
(Measured at 8 positions)
: 0.015 mm (0.0006 in)
SBR020B
BR-28
REAR DISC BRAKE
REAR DISC BRAKE
PFP:44000
On-Board Inspection
NFS000SH
PAD WEAR INSPECTION
●
Check pad thickness from an inspection hole on cylinder body.
Check using a scale if necessary.
Components
NFS000SI
Standard
Standard thickness
: 8.5 mm (0.335 in)
Repair limit thickness
: 2.0 mm (0.079 in)
BRA0010D
1.
Union bolt
2.
Brake hose
3.
Copper washer
4.
Cap
5.
Bleed valve
6.
Sliding pin bolt
7.
Cylinder body
8.
Piston seal
9.
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)
Refer to
and the followings for the symbols in the figure.
1: Apply rubber grease.
2: Apply PBC (Poly Butyl Cuprysil) grease or silicone-based grease.
PFIA0705J
REAR DISC BRAKE
BR-29
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WARNING:
Clean dust on caliper and brake pad with a vacuum dust collector to minimize the hazard of air borne
particles or other materials.
CAUTION:
●
While removing cylinder body, do not 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 shim and shim covers as a set when replacing brake pads.
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Keep rotor free from brake fluid.
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Burnish the brake pads and disc rotor mutually contacting surfaces after refinishing or replacing
rotors, after replacing pads, or if a soft pedal occurs at very low mileage. Refer to
Removal and Installation of Brake Pad
NFS000SJ
REMOVAL
1.
Remove tires from vehicle with power tool.
2.
Remove lower sliding pin bolt.
3.
Hang cylinder body with a wire, and remove pads, pad retainers, shims, and shim cover from torque mem-
ber.
CAUTION:
Deform pad retainer when removing pad retainer from torque member.
INSTALLATION
1.
Apply PBC (Poly Butyl Cuprysil) grease or silicone-based grease to between pad and shim. Install inner
shim, inner shim cover to inner pad, and outer shim, outer shim cover to outer pad.
2.
Install pad retainers and pads to torque member.
3.
Press in piston until pads can be installed, and then install cylin-
der body to torque member.
CAUTION:
In the case of 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 (commercial service tool) to easily
press piston.
4.
Install upper sliding pin bolt and tighten to the specified torque.
Refer to
5.
Check rear disc brake for drag.
6.
Install tires to vehicle.
3: Apply polyglycol ether based lubricant.
: Apply brake fluid.
PFIA0273E
BR-30
REAR DISC BRAKE
Removal and Installation of Brake Caliper Assembly
NFS000SK
REMOVAL
1.
Remove tires from vehicle with power tool.
2.
Fasten disc rotor using wheel nut.
3.
Drain brake fluid. Refer to
.
4.
Remove union bolt and then disconnect brake hose from caliper
assembly.
5.
Remove torque member mounting, bolts, and remove brake cal-
iper assembly.
CAUTION:
Do not drop brake pad.
6.
Remove disc rotor.
CAUTION:
Put matching marks on wheel hub assembly and disc rotor,
if it necessary to remove disc rotor.
INSTALLATION
CAUTION:
●
Refill with new brake fluid “DOT 3”.
●
Never reuse drained brake fluid.
1.
Install disc rotor.
CAUTION:
Alignment marks of disc rotor and wheel hub put at the time of removal when reusing disc rotor.
2.
Install brake caliper assembly vehicle, and tighten torque member mounting bolts to the specified torque.
Refer to
CAUTION:
Before installing caliper assembly, wipe off oil and moisture on all mounting surfaces of rear axle
and caliper assembly and threads, bolts and washers.
3.
Install L-shaped pin of brake hose and then tighten union bolt to
the specified torque. Refer to
BR-12, "Removal and Installation
of Rear Brake Tube and Brake Hose"
.
4.
Refill with new brake fluid and bleed air. Refer to
5.
Check rear disc brake for drag.
6.
Install tires to vehicle.
SFIA2972E
SDIA2638E
SFIA2049E
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