Infiniti Q45 (FY33). Manual — part 427
SMA525A
Front Axle and Front Suspension Parts
Check front axle and front suspension parts for excessive play,
cracks, wear or other damage.
I
Shake each front wheel to check for excessive play.
SFA741
I
Make sure that cotter pin is inserted.
I
Retighten all nuts and bolts to the specified torque.
Tightening torque:
Refer to FRONT SUSPENSION (FA-16).
SFA323B
SFA818A
I
Check spring height from top of wheelarch to ground.
a.
Vehicle must be unladen*, parked on a level surface, and tires
checked for proper inflation and wear (tread wear indicator
must not be showing).
*: Fuel, radiator coolant and engine oil full. Spare tire, jack,
hand tools and mats in designated positions.
b.
Bounce vehicle up and down several times before measuring.
Standard height: Refer to SDS (FA-61).
c.
Spring height is not adjustable. If out of specification, check for
worn springs or suspension parts.
SMA113
I
Check strut (Shock absorber) for oil leakage or damage.
GI
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EM
LC
EC
FE
AT
PD
RA
BR
ST
RS
BT
HA
EL
IDX
ON-VEHICLE SERVICE
FA-7
SMA977A
I
Check suspension ball joint for grease leakage and ball joint
dust cover for cracks or other damage. If ball joint dust cover
is cracked or damaged, replace transverse link.
SFA324B
I
Check suspension ball joint end play.
a.
Jack up front of vehicle and set the stands.
b.
Clamp dial indicator onto transverse link and place indicator tip
on lower edge of brake caliper.
c.
Make sure front wheels are straight and brake pedal is
depressed.
d.
Place a pry bar between transverse link and inner rim of road
wheel.
e.
While raising and releasing pry bar, observe maximum dial
indicator value.
Vertical end play:
0 mm (0 in)
If ball joint vertical end play exists, remove transverse link and
recheck the ball joint. Refer to FA-22.
SFA325B
Front Wheel Bearing
Check that wheel bearings operate smoothly, as well as axial end
play and grease leakage.
Axial end play limit: 0.05 mm (0.0020 in) or less
I
If out of specification or wheel bearing does not turn smoothly,
replace wheel bearing assembly.
Refer to FRONT AXLE (FA-12).
ON-VEHICLE SERVICE
Front Axle and Front Suspension Parts
(Cont’d)
FA-8
Front Wheel Alignment
CAMBER, CASTER AND KINGPIN INCLINATION
Camber, caster and kingpin inclination are preset at factory
and cannot be adjusted.
1.
Set vehicle on turning radius gauge.
SFA637B
2.
Mount Tool as follows.
Tool number:
KV991040S0 (
—
)
KV99104010
q
1
to
q
5
KV99104020
q
6
KV99104030
q
7
KV99104040
q
8
KV99104050
q
9
a.
Select adapter which corresponds with wheel or hub shape
from four types
q
6
to
q
9
.
b.
Screw selected adapter in until it contacts plate
q
1
.
SFA893A
c.
Remove wheel nuts.
SFA894AA
d.
Install guide bolts
q
2
to where wheel nuts were removed and
tighten them by hand.
e.
Install plate and adapter assembly to guide bolts
q
2
.
f.
Install springs
q
4
onto guide bolts
q
2
. Then tighten nuts
q
3
evenly until a little before springs
q
4
are completely com-
pressed.
g.
Install center plate
q
5
.
h.
Mount wheel alignment gauge on attachment plate.
GI
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LC
EC
FE
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PD
RA
BR
ST
RS
BT
HA
EL
IDX
ON-VEHICLE SERVICE
FA-9
Before checking front wheel alignment, be sure to make a prelimi-
nary inspection (Unladen*).
*: Fuel, radiator coolant and engine oil full. Spare tire, jack, hand
tools and mats in designated positions.
SFA975B
PRELIMINARY INSPECTION
1.
Check tires for wear and improper inflation.
2.
Check wheels for deformation, cracks and other damage. If
deformed, remove wheel and check wheel runout.
a.
Remove tire from wheel and mount wheel on a tire balance
machine.
b.
Set dial indicator as shown in the illustration.
Wheel runout (Dial indicator value):
Refer to SDS.
3.
Check front wheel bearings for looseness.
4.
Check front suspension for looseness.
5.
Check steering linkage for looseness.
6.
Check that front shock absorbers work properly.
7.
Check vehicle posture (Unladen).
SFA326BA
CAMBER, CASTER AND KINGPIN INCLINATION
Camber, caster and kingpin inclination are preset at factory
and cannot be adjusted.
1.
Measure camber, caster and kingpin inclination of both right
and left wheels with a suitable alignment gauge.
Camber, Caster and Kingpin inclination:
Refer to SDS (FA-60).
2.
If camber, caster and kingpin inclination are not within
specification, inspect and replace any damaged or worn front
suspension parts.
SFA614B
TOE-IN
Measure toe-in using following procedure. If out of specification,
inspect and replace any damaged or worn front suspension parts.
WARNING:
I
Always perform the following procedure on a flat surface.
I
Make sure that no person is in front of the vehicle before
pushing it.
1.
Bounce front of vehicle up and down to stabilize the posture.
2.
Push the vehicle straight ahead about 5 m (16 ft).
3.
Put a mark on base line of tread (rear side) of both tires at the
same height as hub center. These are measuring points.
ON-VEHICLE SERVICE
Front Wheel Alignment (Cont’d)
FA-10
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