Infiniti M35/M45 Y50. Manual — part 324
REAR DISC BRAKE
BR-31
C
D
E
G
H
I
J
K
L
M
A
B
BR
Disassembly and Assembly of Brake Caliper Assembly
NFS000SL
NOTE:
Do not remove torque member, pads, shims, shim cover, and pad retainers when disassembling and assem-
bling cylinder body assembly.
DISASSEMBLY
1.
Remove sliding pin bolt, and then remove cylinder body from torque member.
CAUTION:
Do not drop pads, shims, shim cover and pad retainers from torque member.
2.
Remove sliding pin boots from torque member.
3.
Remove retaining ring from cylinder body using a flat-bladed
screwdriver as shown in the figure.
4.
Place a wooden block as shown in the figure, and blow air from
union bolt mounting hole to remove piston and piston boot.
CAUTION:
Do not get fingers caught in the piston.
5.
Remove piston seal from cylinder body using a flat-bladed
screwdriver.
CAUTION:
Be careful not to damage a cylinder inner wall.
INSPECTION AFTER DISASSEMBLY
Cylinder Body
Check the inner wall of cylinder for corrosion, wear, and damage. If a malfunction is detected, replace cylinder
body.
CAUTION:
Clean cylinder body using new brake fluid. Never use mineral oils such as gasoline or kerosene.
Torque Member
Check torque member for wear, cracks, and damage. Replace if there are.
Piston
Check the piston surface for corrosion, wear, and damage. If a malfunction is detected, replace applicable
part.
SBR028A
BRD0041D
SFIA2277E
BR-32
REAR DISC BRAKE
CAUTION:
A piston sliding surface is plated. Do not polish with sandpaper.
Sliding Pin Bolt, Sliding Pin Boot
Check sliding pin bolt and sliding pin boot for wear, damage, and cracks. Replace if there are.
ASSEMBLY
1.
Apply polyglycol ether based lubricant to piston seal, and install
them to cylinder body.
CAUTION:
Do not reuse piston seal.
2.
Apply rubber grease to piston boot. Cover the piston end with
the piston boot, and then install cylinder side lip on the piston
boot securely into the groove on cylinder body.
CAUTION:
Do not reuse piston boot.
3.
Apply brake fluid to piston. Push piston into cylinder body 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 cylinder inner wall from being rubbed.
4.
Secure piston boot with retaining ring.
CAUTION:
●
Make sure that boot is securely engaged in the groove on
cylinder body.
●
Do not reuse retainer ring.
5.
Install sliding pin boot to torque member.
6.
Install the cylinder body to torque member, and then tighten slid-
ing pin bolt to the specified torque. Refer to
SFIA2278E
SFIA2498E
SFIA2279E
SFIA2280E
REAR DISC BRAKE
BR-33
C
D
E
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H
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K
L
M
A
B
BR
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 dial gauge. [Measured at 10 mm (0.39 in)
inside 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 disc rotor if it is outside repair limit after performing the above operation.
Thickness Inspection
Check the thickness of the disc rotor using a micrometer. Replace
disc rotor if the 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 the vehicle on a 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
: 0.055 mm (0.0022 in)
(With it attached to the vehicle)
BRA0697D
Standard thickness
: 16.0 mm (0.631 in)
Wear limit
: 14.0 mm (0.551 in)
Thickness variation
(Measured at 8 positions)
: 0.015 mm (0.0006in)
SFIA2284E
BR-34
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
PFP:00030
General Specifications
NFS000SM
Unit: mm (in)
Brake Pedal
NFS000SN
Unit: mm (in)
Brake Booster
NFS000SO
Vacuum type
Unit: mm (in)
Check Valve
NFS000SP
Front Disc Brake
NFS000SQ
Unit: mm (in)
Rear Disc Brake
NFS000SR
Unit: mm (in)
Front brake
Cylinder bore diameter
45.0 (1.772)
×
2
Pad length
×
width
×
thickness
132.0
×
50.0
×
11.0 (5.20
×
1.969
×
0.433)
Rotor outer diameter
×
thickness
320
×
28 (12.60
×
1.10)
Rear brake
Cylinder bore diameter
42.86 (1.687)
Pad length
×
width
×
thickness
83.0
×
31.9
×
8.5 (3.268
×
1.256
×
0.335)
Rotor outer diameter
×
thickness
308
×
16 (12.13
×
0.63)
Master cylinder
Cylinder bore diameter
25.4 (1)
Control valve
Valve model
Electric brake force distribution
Brake booster
Diaphragm diameter
255 (10)
Recommended brake fluid
DOT 3
Brake pedal height (from dash lower panel top surface)
157
−
167 (6.18
−
6.57)
Depressed pedal height
[under a force of 490 N (50 kg, 110 lb) with engine running]
90 (3.54) or more
Clearance between threaded end of the stop lamp switch/brake
switch and bracket
0.74
−
1.96 (0.0291
−
0.0772)
Pedal play
3
−
11 (0.12
−
0.43)
Input rod installation standard dimension
125 (4.92)
Vacuum leakage
[at vacuum of – 66.7 kPa (– 500 mmHg, – 19.69 inHg)]
Within 1.3 kPa (10 mmHg, 0.39 inHg) of vacuum for 15 seconds
Brake pad
Standard thickness
11.0 (0.433)
Repair limit thickness
2.0 (0.079)
Disc rotor
Standard thickness
28.0 (1.102)
Wear limit
26.0 (1.024)
Thickness variation (measured at 8 positions)
0.015 (0.0006)
Runout limit (with it attached to the vehicle)
0.035 (0.0014)
Brake pad
Standard thickness
8.5 (0.335)
Repair limit thickness
2.0 (0.079)
Disc rotor
Standard thickness
16.0 (0.631)
Wear limit
14.0 (0.551)
Thickness variation (measured at 8 positions)
0.015 (0.0006)
Runout limit (with it attached to the vehicle)
0.055 (0.0022)
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