LEXUS SC400 1991 Service Repair Manual

ADJUSTMENT CHART
SA155±04
HOW TO READ ADJUSTMENT CHART
(a) Mark on the graph the measurements taken from the vehicle.
Example:
Camber +0 31'
Caster +3 56'
(b) As shown in the illustration, read from the graph the amounts
by which the front and/or rear cams are to be adjusted.
Amount to turn adjusting cam (by graduation):
Front cam +(Longer) 1.8
Rear cam ±(Shorter) 2.2
SA±8±
SUSPENSION AND AXLE WHEEL ALIGNMENT
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SUSPENSION AND AXLE WHEEL ALIGNMENTSA±9
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REAR WHEEL ALIGNMENT
SA1A0±01
1. MEASURE VEHICLE HEIGHTRear vehicle height (SC400):
 Tire size Rear
 P225/55R16251.7 mm (9.909 in.)
Rear vehicle height (SC300):
 Tire size Rear
 P215/60R15247.7 mm (9.752 in.)
Measuring point:
Measure from the ground to the center of the lower suspen-
sion arm No.2 mounting bolt.
NOTICE: Before inspecting the wheel alignment, adjust the vehicle height to spe\
cification.If the vehicle height is not standard, try to adjust it by pushing
down on or lifting the body.
2. INSTALL CAMBER±CASTER±KINGPIN GAUGE OR ONTO WHEEL ALIGNMENT TESTER
Follow the specific instructions of the equipment manufactur-
er.
3. INSPECT CAMBER
Camber:
 


Camber
Left±right error 


±0
553 ' + 45 '
30 ' or less
4. INSPECT TOE±IN
Toe±in (total):
A+B 0.4 5 + 0.2 5
C±D 4.5 + 2 mm (0.18 + 0.08 in.)
5. ADJUST CAMBER AND TOE±IN
(a) Measure the length of the lower suspension arm No.1 and
No.2, as shown in the illustration.
SA±10
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Length:(E±F) or (F±E) should be less 4.0 mm.
If not, adjust the length of the arms by turning the adjusting
cam, as shown, until (E±F) or (F±E) is less than 4.0 mm.
(b) Measure the camber and toe±in. Specifications:
 


Camber
Left±right error 


±0

53 ' + 30 '
30' or less
 


Toe±in 


A+B 0.4

+ 0.1

C±D 4.5 + 1 mm (0.18 + 0.04 in.)
If the camber and toe±in are still not within the specification,
adjust the camber and toe±in with the adjusting cam.
(c) Loosen and adjust the No.1 and/or No.2 cams.
(d) Adjust camber and toe±in by turning the No.1 and/ or No.2 cams.
(See adjustment chart )
(e) Torque the No.1 and/or No.2 cam nuts.
Torque: 184 N Vm (1,880 kgf Vcm, 134 ft Vlbf)
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SUSPENSION AND AXLE WHEEL ALIGNMENTSA±11
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ADJUSTMENT CHART
SA0VA±09
HOW TO READ ADJUSTMENT CHART
(a) Mark on the graph the measurements taken from the vehicle.
Example:
Camber (LH) ±1
08 '
Camber (RH) ±0
23 '
Toe±in 12.5 mm (0.49 in.)
(b) As shown the illustration, from the graph the amounts by which the front and/or rear cam are to be adjusted.
Amount to turn adjusting cam (by graduation):
(LH Front cam)
Decrease 0.3 (Shorter)
(LH Rear cam)
Increase 1.7 (Longer)
(RH Front cam)
Increase 2.8 (Longer)
(RH Rear cam)
Increase 1.3 (Longer)
SA±12±
SUSPENSION AND AXLE WHEEL ALIGNMENT
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SUSPENSION AND AXLE WHEEL ALIGNMENTSA±13
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FRONT AXLE HUB
DESCRIPTION
SA002±06
The wheel bearings are double±row angular ball bearings having small rol\
ling resistance and are free from
maintenance.
The preload of the bearing can be determined only by tightening the axle hub\
nut at a specified torque,
improving serviceability.
SA±14±
SUSPENSION AND AXLE FRONT AXLE HUB
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PREPARATION
SST (SPECIAL SERVICE TOOLS)
SA00K±03
RECOMMENDED TOOLS
SA00L±02
EQUIPMENT
SA00M±01\
 
\

\
Dial indicator 


\
 
\


\

\

Torque wrench
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SUSPENSION AND AXLE FRONT AXLE HUBSA±15
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FRONT AXLE HUB
COMPONENTS
SA003±0B
SA±16±
SUSPENSION AND AXLE FRONT AXLE HUB
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STEERING KNUCKLE WITH AXLE HUB
REMOVAL
SA01Y±08
1. JACK UP VEHICLE AND REMOVE FRONT WHEEL
2. REMOVE FRONT BRAKE CALIPER AND BRAKE DISC
(a) Remove the 2 bolts and remove the brake caliper from thesteering knuckle.
(b) Hang up the brake caliper using wire, etc.
(c) Place matchmarks on the brake disc and axle hub.
(d) Remove the 2 screws and remove the brake disc.
3. REMOVE ABS SPEED SENSOR FROM STEERING KNUCKLE
Remove the bolt and disconnect the sensor from the steering
knuckle.
4. CHECK BACKLASH IN BEARING SHAFT DIRECTION Place the dial indicator near the center of the axle hub and
check the backlash in the bearing shaft direction.
Maximum:
0.05 mm (0.0020 in.)
If greater than the specified maximum, replace the bearing.
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SUSPENSION AND AXLE FRONT AXLE HUBSA±17
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