Infiniti QX4 (R50). Manual — part 117
SBR873C
Front Sensor Rotor
NBBR0079S03
REMOVAL
NBBR0079S0301
1.
Remove the front wheel hub. Refer to AX-8, “Disassembly”.
2.
Remove the sensor rotor using suitable puller, drift and bear-
ing replacer.
SBR400DA
INSTALLATION
NBBR0079S0302
Install the sensor rotor using suitable drift and press.
I
Always replace sensor rotor with new one.
I
Pay attention to the direction of front sensor rotor as shown in
figure.
SRA800AA
Rear Sensor Rotor
NBBR0079S04
REMOVAL
NBBR0079S0401
I
Remove the sensor rotor using Tool.
SBR402D
INSTALLATION
NBBR0079S0402
Install the sensor rotor using suitable drift and press.
I
Always replace sensor rotor with new one.
I
Pay attention to the direction of front sensor rotor as shown in
figure.
SBR503E
G Sensor
NBBR0079S06
Always replace G sensor if bumped or dropped. Otherwise,
performance characteristics of G sensor will be changed,
which in turn changes ABS control performance characteris-
tics.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
ST
RS
BT
HA
SC
EL
IDX
REMOVAL AND INSTALLATION
ABS
Front Sensor Rotor
BR-81
ABS Actuator and Electric Unit
NBBR0079S07
SBR468E
REMOVAL
NBBR0079S0701
1.
Disconnect battery cable.
2.
Drain brake fluid. Refer to “Changing Brake Fluid”, BR-7.
3.
Remove mounting bracket fixing bolts and nuts.
4.
Disconnect connector, brake pipes and remove fixing nuts and
actuator ground cable.
INSTALLATION
NBBR0079S0702
CAUTION:
After installation, refill brake fluid. Then bleed air. Refer to
“Bleeding Brake System”, BR-8.
1.
Tighten actuator ground cable.
Place ground cable at a notch of mounting bracket.
2.
Connect brake pipes temporarily.
3.
Tighten fixing bolts and nuts.
4.
Tighten brake pipes.
5.
Connect connector and battery cable.
REMOVAL AND INSTALLATION
ABS
ABS Actuator and Electric Unit
BR-82
General Specifications
NBBR0118
Unit: mm (in)
Applied model
2WD
4WD
Front brake
Brake model
AD31VC
Cylinder bore diameter
×
number of pistons
44.45 (1.7500)
×
2
Pad
Length
×
width
×
thickness
132.0
×
52.5
×
11
(5.20
×
2.067
×
0.43)
Rotor outer diameter
×
thickness
300
×
28 (11.81
×
1.10)
Rear brake
Brake model
LT30C
Cylinder bore diameter
22.23 (7/8)
Lining length
×
width
×
thickness
296
×
50
×
6.1
(11.65
×
1.97
×
0.240)
Drum inner diameter
295.0 (11.61)
Master cylinder
Bore diameter
25.40 (1)
Control valve
Valve model
Proportioning valve
within master cylinder
Linkage type load
sensing valve
Split point
kPa (kg/cm
2
, psi)
×
reducing ratio
2,942 (30, 427)
×
0.2
(Variable)
×
0.18
Brake booster
Booster model
M235T
Diaphragm diameter
Pri: 252 (9.92)
Sec: 205 (8.07)
Recommended brake fluid
DOT 3
Disc Brake
NBBR0119
Unit: mm (in)
Brake model
AD31VC
Pad wear limit
Minimum thickness
2.0 (0.079)
Rotor repair limit
Minimum thickness
26.0 (1.024)
Drum Brake
NBBR0120
Unit: mm (in)
Brake model
LT30C
Lining wear limit
Minimum thickness
1.5 (0.059)
Drum repair limit
Maximum inner diameter
296.5 (11.67)
Out-of-round limit
0.03 (0.0012)
Brake Pedal
NBBR0121
Unit: mm (in)
Transmission
A/T
Free height “H”*
175 - 185
(6.89 - 7.28)
Depressed height “D”*
[under force of 490 N (50 kg, 110 lb) with engine running]
70 (2.76)
Clearance “C” between pedal stopper and threaded end of stop lamp switch or ASCD switch
0.3 - 1.0 (0.012 - 0.039)
Pedal free play
At clevis
1.0 - 3.0 (0.039 - 0.118)
At pedal pad
1 - 3 (0.04 - 0.12)
*: Measured from surface of metal panel to pedal pad
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
ST
RS
BT
HA
SC
EL
IDX
SERVICE DATA AND SPECIFICATIONS (SDS)
General Specifications
BR-83
Parking Brake Control
NBBR0084
Unit: notch
Control Type
Center lever
Lever stroke
[under force of 196 N (20 kg, 44 lb)]
6 - 8
Lever stroke when warning switch comes on
1 or less
SERVICE DATA AND SPECIFICATIONS (SDS)
Parking Brake Control
BR-84
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