1991 LEXUS SC300 steering wheel

WHEEL ALIGNMENT
FRONT WHEEL ALIGNMENT
SA19Z±01
1. MEASURE VEHICLE HEIGHTFront vehicle height (SC400):
 Tire size Front P225/55R16194.4 mm (7.654 in.)
Front vehicle height (SC300):
 Tire size Front P215/60R15190.4 mm (7.496 in.)
Measuring point:
Measure from the ground to the center of the lower suspen-
sion arm front mounting bolt.
NOTICE: Before inspecting the wheel alignment, adjust
the vehicle height to specification.
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, CASTER AND STEERING AXIS INCLINATION
Specifications:
 

Camber
Left±right error 

0
01 ' + 45 '
30 ' or less
 

Caster
Left±right error256 ' + 45 '
30 ' or less
 


Steering axis inclination
Left±right error 


8
58 ' + 45 '
30 ' or less
If the steering axis inclination is not as specified, after camber
and caster have correctly adjusted, recheck the steering
knuckle front wheel for bearing or looseness.
4. INSPECT TOE±IN
Toe±in (total): A + B 0.1  + 0.2 
C±D 1 + 2 mm (0.04 + 0.08 in.)
If toe±in is not within specification adjust by the tie rod end.
±
SUSPENSION AND AXLE WHEEL ALIGNMENTSA±5
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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.
±
SUSPENSION AND AXLE FRONT AXLE HUBSA±17
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5. CONNECT ABS SPEED SENSOR TO STEERINGKNUCKLE
Connect the sensor to the steering knuckle with the bolt.
Torque: 7.8 N Vm (80 kgf Vcm, 69 in. Vlbf)
6. INSTALL FRONT WHEEL AND LOWER VEHICLE
Torque: 103 N Vm (1,050 kgf Vcm, 76 ft Vlbf)
7. CHECK FRONT WHEEL ALIGNMENT
(See page SA±5)
FRONT WHEEL HUB BOLT
REPLACEMENT
SA1A1±01
1. JACK UP VEHICLE AND REMOVE FRONT WHEEL
2. REMOVE FRONT BRAKE CALIPER AND DISC
(See page SA±30)
3. REMOVE HUB BOLT Using SST, remove the hub bolt.
SST 09628±10011
4. INSTALL HUB BOLT Install a washer and nut to the bolt, as shown in the illustra-
tion, and install a new hub bolt by torquing the nut.
5. INSTALL FRONT BRAKE DISC AND CALIPER (See page SA±36)
6. INSTALL FRONT WHEEL AND LOWER VEHICLE
Torque: 103 N Vm (1,050 kgf Vcm, 76 ft Vlbf)
SA±24±
SUSPENSION AND AXLE FRONT AXLE HUB
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FRONT SHOCK ABSORBER REMOVAL
SA0RN±04
1. JACK UP VEHICLE AND REMOVE FRONT WHEEL
2. REMOVE BRAKE CALIPER
(a) Remove the 2 bolts and caliper from the steering knuckle.
(b) Hang up the brake caliper using wire, etc.
3. REMOVE FRONT FENDER SPLUSH SHIELD
4. LH side only:MOVE WASHER TANK
(a) Remove the bolt.
(b) Remove the bolt and move the washer tank away from the body.
5. DISCONNECT ABS SPEED SENSOR AND WIRE HARNESS
(a) Remove the bolt and disconnect the speed sensor from the
steering knuckle.
SA±28
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(b) Install and tighten the bolt.
6. INSTALL FRONT FENDER SPLASH SHIELD
7. INSTALL DISC BRAKE CALIPERInstall the brake caliper to the steering knuckle with the 2
bolts.
Torque: 118 N Vm (1,200 kgf Vcm, 87 ft Vlbf)
8. STABILIZE SUSPENSION
(a) Install the front wheel and lower vehicle.
Torque: 103 N Vm (1,050 kgf Vcm, 76 ft Vlbf)
(b) Bounce the vehicle up and down several times to stabilize the
suspension.
(c) Jack up vehicle and remove the front wheel.
9. TIGHTEN BOLT AND NUT ON LOWER SIDE OF SHOCK ABSORBER
(a) Support the lower arm with a jack.
(b) Tighten the nut to the specified torque.
Torque: 143 N Vm (1,460 kgf Vcm, 106 ft Vlbf)
10. TIGHTEN BOLT AND NUT OF UPPER SUSPENSION ARM
Tighten the bolt and nut to the specified torque.
Torque: 164 N Vm (1,670 kgf Vcm, 121 ft Vlbf)
11. INSTALL FRONT WHEEL AND LOWER VEHICLE
Torque: 103 N Vm (1,050 kgf Vcm, 76 ft Vlbf)
12. CHECK FRONT WHEEL ALIGNMENT
(See page SA±5)
SA±34
±
SUSPENSION AND AXLE FRONT SUSPENSION
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UPPER SUSPENSION ARM REMOVAL
SA1A2±01
1. JACK UP VEHICLE AND REMOVE FRONT WHEEL
2. REMOVE FRONT BRAKE CALIPER AND DISC
(a) Remove the 2 bolts and brake caliper from the steeringknuckle.
(b) Hang up the caliper using wire, etc.
3. REMOVE FRONT FENDER SPLASH SHIELD
4. LH side only: MOVE WASHER TANK
(a) Loosen the bolt.
(b) Remove the bolt and move the washer tank away from the body.
5. REMOVE ABS SPEED SENSOR AND WIRE HARNESS CLAMP
(a) Remove the bolt and disconnect the speed sensor from the
steering knuckle.
SA±36
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SUSPENSION AND AXLE FRONT SUSPENSION
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(b) Install and tighten the bolt.
4. INSTALL FRONT FENDER SPLASH SHEILD
5. INSTALL BRAKE CALIPERInstall the brake caliper to the steering knuckle with the 2
bolts.
Torque: 118 N Vm (1,200 kgf Vcm, 87 ft Vlbf)
6. STABILIZE SUSPENSION
(a) Install the front wheel.
Torque: 103 N Vm (1,050 kgf Vcm, 76 ft Vlbf)
(b) Bounce the vehicle up and down several times to stabilize the
suspension.
(c) Jack up the vehicle and remove the front wheel.
7. TIGHTEN BOLT AND NUT OF UPPER SUSPENSION ARM
(a) Support the lower arm with jack.
(b) Torque the bolt and nut the specified torque.
Torque: 164 N Vm (1,670 kgf Vcm, 121 ft Vlbf)
8. INSTALL FRONT WHEEL AND LOWER VEHICLE
Torque: 103 N Vm (1,050 kgf Vcm, 76 ft Vlbf)
9. CHECK FRONT WHEEL ALIGNMENT
(See page SA±5)
±
SUSPENSION AND AXLE FRONT SUSPENSIONSA±39
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LOWER SUSPENSION ARM REMOVAL
SA1A4±01
1. JACK UP VEHICLE AND REMOVE FRONT WHEEL
2. REMOVE ENGINE UNDER COVER
3. REMOVE FRONT BRAKE CALIPER
(b) Hang up the brake caliper using wire, etc.
4. DISCONNECT STABILIZER BAR LINK FROM LOWERSUSPENSION ARM
Remove the nut and disconnect the link from the arm.
5. DISCONNECT STEERING KNUCKLE
(a) Remove the clip and nut.
(b) Using SST, disconnect the steering knuckle from the lower suspension arm.
SST 09628±62011
6. REMOVE LOWER SUSPENSION ARM
(a) R e m o v e t h e b o l t a n d n u t a n d d i s c onnect the lower
suspension arm from the shock absorber.
±
SUSPENSION AND AXLE FRONT SUSPENSIONSA±41
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