Infiniti Q45. Manual — part 258
REAR DISC BRAKE
BR-33
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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.
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 the piston boot with retaining ring.
CAUTION:
●
Make sure that boot is securely engaged in a groove on
cylinder body.
●
Do not reuse retaining ring.
5.
Install sliding pins and sliding pin boots to torque member.
6.
Install torque member to axle assembly, and tighten torque
member mounting bolts to the specified torque. Refer to
.
CAUTION:
Before installing torque member to axle assembly, wipe oil
and grease on washer seats on axle assembly and mounting surfaces of torque member.
7.
Install pad retainers to torque member.
8.
After assembling shims and shim covers to pads, assemble it to torque member.
9.
Install cylinder body, and tighten sliding pin bolts to the specified torque. Refer to
10. Install brake hose to cylinder body and tighten union bolt to the specified torque. Refer to
CAUTION:
●
Install a projection of brake hose metal fitting by aligning with protrusion on cylinder body.
●
Do not reuse copper washer on union bolt.
11. After installing caliper assembly, refill new brake fluid and bleed air. Refer to
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.
Run Out Inspection
1.
Using wheel nuts, fix the disc rotor to wheels hub. (2 or more positions)
2.
Using a dial indicator, check run out.
CAUTION:
Before measuring, make sure that axle end play is 0 mm.
3.
If run out is outside limit, find minimum run out point by shifting
mounting positions of disc rotor and wheel hub by one hole.
SFIA2498E
SFIA2280E
Measurement point
: At a point 10 mm (0.394 in)
from outer edge of disc.
Run out limit
: 0.07 mm (0.0028 in) or less
BRA0013D
BR-34
REAR DISC BRAKE
Thickness Inspection
Using a micrometer, check thickness of disc rotor. If thickness is out-
side standard, replace disc rotor.
Brake Burnishing Procedure
NFS000C0
Burnish the brake pad or lining contact surfaces of 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.
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 brake.
4.
Repeat steps 1 to 3 until pad and disc rotor are securely fitted.
Standard thickness
: 16.0 mm (0.630 in)
Wear limit
: 14.0 mm (0.551 in)
Maximum uneven wear
(measured at 8 positions)
: 0.015 mm (0.0006 in)
or less
SBR020B
SERVICE DATA AND SPECIFICATIONS (SDS)
BR-35
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SERVICE DATA AND SPECIFICATIONS (SDS)
PFP:00030
General Specifications
NFS000C1
Unit: mm (in)
Brake Pedal
NFS000C2
Check Valve
NFS000C3
Brake Booster
NFS000C4
Vacuum type
Front Disc Brake
NFS000C5
Rear Disc Brake
NFS000C6
Front brake
Cylinder bore diameter
45.0 (1.77)
×
2
Pad
Length
×
width
×
thickness
130.0
×
50.0
×
10.0 (5.91
×
1.97
×
0.394)
Rotor outer diameter
×
thickness
290
×
28.0 (11.42
×
1.102)
Rear brake
Cylinder bore diameter
42.86 (1.687)
Pad
Length
×
width
×
thickness
99.0
×
33.2
×
9.8 (3.90
×
1.307
×
0.386)
Rotor outer diameter
×
thickness
292
×
16.0 (11.50
×
0.630)
Master cylinder
Cylinder bore diameter
25.4 (1)
Control valve
Valve model
Electric brake force distribution
Brake booster
Diaphragm diameter
Primary
230 (9.06)
Secondary
205 (8.07)
Recommended brake fluid
DOT 3
Pedal play
3 – 11 mm (0.12 – 0.43 in)
Brake pedal height (from dash lower panel top surface)
192.4 – 202.4 mm (7.57 – 7.97 in)
Depressed pedal height
[under a force of 490 N (50 kg, 110 lb) with engine running]
90 mm (3.54 in) or more
Clearance between stopper rubber and threaded end of stop
lamp switch and ASCD cancel switch
0.74 – 1.96 mm (0.0291 – 0.0772 in)
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
Vacuum leakage
[at vacuum of
−
66.7 kPa (
−
500 mmHg,
−
19.69 inHg)]
Within 3.3 kPa (25 mmHg, 0.98 inHg) of vacuum for 15 seconds
Input rod installation standard dimension
125 mm (4.92 in)
Brake pad
Standard thickness
10.0 mm (0.394 in)
Repair limit thickness
2.0 mm (0.079 in)
Disc rotor
Standard thickness
28.0 mm (1.102 in)
Repair limit thickness
26.0 mm (1.024 in)
Run out limit
0.07 mm (0.0028 in) or less
Brake pad
Standard thickness
9.8 mm (0.386 in)
Repair limit thickness
2.0 mm (0.079 in)
Disc rotor
Standard thickness
16.0 mm (0.630 in)
Repair limit thickness
14.0 mm (0.551 in)
Run out limit
0.07 mm (0.0028 in) or less
BR-36
SERVICE DATA AND SPECIFICATIONS (SDS)
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