Infiniti QX4 (R50). Manual — part 557
SFA725B
ASSEMBLY
NBSU0011
I
When installing coil spring on strut, it must be positioned as
shown in the figure at left.
SFA664AA
I
Install upper spring seat with its cutout facing the inner side of
vehicle.
SFA767B
Stabilizer Bar
REMOVAL AND INSTALLATION
NBSU0012
I
Remove stabilizer bar and connecting rod.
SFA768B
I
When installing stabilizer, make sure that paint mark and
bracket face in their correct directions.
SFA769B
I
When removing and installing stabilizer bar fix portion A.
FRONT SUSPENSION
Coil Spring and Strut Assembly (Cont’d)
SU-10
SFA449BA
I
Install stabilizer bar with ball joint socket properly placed.
ARA027
INSPECTION
NBSU0013
I
Check stabilizer for deformation and cracks. Replace if neces-
sary.
I
Check rubber bushings for deterioration and cracks. Replace
if necessary.
I
Check ball joint can rotate in all directions. If movement is not
smooth and free, replace stabilizer bar connecting rod.
SFA757B
Transverse Link and Lower Ball Joint
REMOVAL AND INSTALLATION
NBSU0014
1.
Separate drive shaft from knuckle.
Refer to AX-10, “Drive Shaft”.
2.
Separate lower ball joint stud from knuckle.
3.
Remove lower ball joint assembly from transverse link.
4.
Remove transverse link.
5.
During installation, final tightening must be carried out at curb
weight with tires on ground.
6.
After installation, check wheel alignment.
Refer to “FRONT WHEEL ALIGNMENT”, “On-vehicle Service”,
SU-6.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
BR
ST
RS
BT
HA
SC
EL
IDX
FRONT SUSPENSION
Stabilizer Bar (Cont’d)
SU-11
INSPECTION
=NBSU0015
Transverse Link
NBSU0015S01
I
Check transverse link for damage, cracks and deformation.
Replace it if necessary.
I
Check rubber bushing for damage, cracks and deformation.
Replace transverse link if necessary.
SFA858AA
Lower Ball Joint
NBSU0015S02
I
Check ball joint for excessive play. Replace lower ball joint
assembly if any of the following exists:
−
Ball stud is worn.
−
Joint is hard to swing.
−
Play in axial direction is excessive.
Before checking, turn ball joint at least 10 revolutions so that ball
joint is properly broken in.
Swinging force “A”:
(measuring point: cotter pin hole of ball stud)
Refer to SDS, SU-13.
Turning torque “B”:
Refer to SDS, SU-13.
Vertical end play “C”:
Refer to SDS, SU-13.
Check dust cover for damage. Replace it and cover clamp if nec-
essary.
FRONT SUSPENSION
Transverse Link and Lower Ball Joint (Cont’d)
SU-12
Service Data and Specifications (SDS)
GENERAL SPECIFICATIONS (FRONT)
=NBSU0016
Suspension type
Independent macpherson strut with coil spring
Strut type
Double-acting hydraulic
Stabilizer bar
Standard equipment
WHEEL ALIGNMENT (UNLADEN*1)
NBSU0017
Unit: Degree minute (Decimal degree)
Applied model
All
Camber
Minimum
−0°35
′
(−0.58°)
Nominal
0°10
′
(0.17°)
Maximum
0°55
′
(0.92°)
Left and right differ-
ence
45
′
(0.75°) or less
Caster
Minimum
2°15
′
(2.25°)
Nominal
3°00
′
(3.00°)
Maximum
3°45
′
(3.75°)
Left and right differ-
ence
45
′
(0.75°) or less
Kingpin inclination
Minimum
13°35
′
(13.58°)
Nominal
14°20
′
(14.33°)
Maximum
15°05
′
(15.08°)
Total toe-in
Distance (A - B)
Minimum
1 mm (0.04 in)
Nominal
2 mm (0.08 in)
Maximum
3 mm (0.12 in)
Angle (left plus right)
Minimum
5
′
(0.08°)
Nominal
10
′
(0.17°)
Maximum
15
′
(0.25°)
Wheel turning angle
Full turn*2
Inside
Minimum
30°00
′
(30.00°)
Nominal
33°00
′
(33.00°)
Maximum
34°00
′
(34.00°)
Outside
Minimum
28°00
′
(28.00°)
Nominal
31°00
′
(31.00°)
Maximum
32°00
′
(32.00°)
*1: Fuel, radiator coolant and engine oil full. Spare tire, jack, hand tools and mats in designated positions.
*2: On power steering models, wheel turning force (at circumference of steering wheel) of 98 to 147 N (10 to 15 kg, 22 to 33 lb) with
engine idle.
LOWER BALL JOINT
NBSU0018
Swinging force “A”
(Measuring point: cotter pin hole of ball stud)
7.8 - 76.5 N (0.8 - 7.8 kg, 1.8 - 17.2 lb)
Turning torque “B”
0.5 - 4.9 N·m (5 - 50 kg-cm, 4.3 - 43.4 in-lb)
Vertical end play “C”
0 mm (0 in)
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
BR
ST
RS
BT
HA
SC
EL
IDX
FRONT SUSPENSION
Service Data and Specifications (SDS)
SU-13
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