1991 LEXUS SC400 steering

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.
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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.
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SUSPENSION AND AXLE FRONT AXLE HUBSA±17
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5. CHECK AXLE HUB DEVIATIONUsing a dial indicator, check the deviation at the surface of
the axle hub outside the hub bolt.
Maximum:
0.05 mm (0.0020 in.)
If greater than the specified maximum, replace the axle hub.
6. DISCONNECT TIE ROD END FROM STEERING KNUCKLE
(a) Remove the cotter pin and nut.
(b) Using SST, disconnect the tie rod end from the steering
knuckle.
SST 09628±10011
7. DISCONNECT STEERING KNUCKLE FROM U PPER
SUSPENSION ARM
(a) Remove the cotter pin and nut.
(b) Using SST, disconnect the steering knuckle from the upper
suspension arm.
SST 09628±62011
8. REMOVE STEERING KNUCKLE
(a) Remove the clip and nut.
(b) Using SST, remove the steering knuckle from the lower suspension arm.
SST 09628±62011
SA±18
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SUSPENSION AND AXLE FRONT AXLE HUB
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FRONT AXLE HUB DISASSEMBLY
SA0RL±04
1. REMOVE HUB BEARING CAPUsing a screwdriver, remove the hub bearing cap from the
steering knuckle.
2. REMOVE FRONT AXLE HUB LOCK NUT AND ABS SPEED SENSOR ROTOR
(a) Clamp the axle hub in a soft jaw vise.
HINT: Close vise until it holds hub bolt do not tighten further.
(b) Using a hammer and chisel, loosen the staked part of the lock
nut and remove it.
(c) Remove the sensor rotor.
NOTICE: Take care not to scratch the serrations of the sensor
rotor.
3. REMOVE AXLE SHAFT FROM STEERING KNUCKLE
(a) Remove the 4 bolts and shift the brake dust cover toward the hub side (outside).
(b) Using SST, remove the axle shaft from the steering knuckle. SST 09950±20017
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SUSPENSION AND AXLE FRONT AXLE HUBSA±19
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4. REMOVE INNER RACE (OUTSIDE) FROM AXLE SHAFTUsing SST, remove the inner race from the axle shaft.
SST 09950±20017
5. REMOVE OIL SEAL Using SST, remove the oil seal from the steering knuckle.
SST 09308±00010
6. REMOVE BEARING FROM STEERING KNUCKLE
(a) Using snap ring pliers, remove the snap ring.
(b) Position the inner race above the bearing on the inner side.
(c) Using SST and a press, remove the bearing from the steering
knuckle.
SST 09608±35014 (09608±06100)
SA±20
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SUSPENSION AND AXLE FRONT AXLE HUB
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FRONT AXLE HUB ASSEMBLY
SA0W3±03
1. INSTALL BEARING
(a) Using SST, install a new bearing to steering knuckle.SST 09608±35014 (09608±06200)
NOTICE: If the inner race and balls come loose from the
bearing outer race, be sure to install them on the same
side as before.
(b) Using snap ring pliers, install the snap ring.
2. INSTALL OIL SEAL
(a) Install the inner race (outside).
(b) Using SST and a hammer, tap in a new oil seal until it is flush
with end surface of the steering knuckle.
SST 09608±32010
(c) Coat MP grease to the oil seal lip.
3. INSTALL AXLE HUB TO STEERING KNUCKLE
(a) Install the brake dust cover to the steering knuckle with the 4 bolts.
Torque: 8.3 N Vm (85 kgf Vcm, 74 in. Vlbf)
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SUSPENSION AND AXLE FRONT AXLE HUBSA±21
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(b) Using SST and a press, press the axle hub to steeringknuckle.
SST 09608±32010, 09608±35014 (09608±06040)
4. INSTALL ABS SPEED SENSOR ROTOR NOTICE: Do not scratch the serrations of the sensor ro-
tor.
5. INSTALL AXLE HUB LOCK NUT
(a) Install and torque a new axle hub lock nut.
Torque: 199 N Vm (2,030 kgf Vcm, 147 ft Vlbf)
(b) Using a screwdriver and hammer, stake the lock nut.
6. INSTALL HUB BEARING CAP
Using a screwdriver and hammer, install the hub bearing cap
to the steering knuckle.
SA±22
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SUSPENSION AND AXLE FRONT AXLE HUB
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FRONT AXLE HUB INSTALLATION
SA040±06
1. INSTALL STEERING KNUCKLE TO UPPER BALL JOINT
(a) Install the steering knuckle to the upper suspension arm withthe nut.
Torque: 103 N Vm (1,050 kgf Vcm, 76 ft Vlbf)
(b) Install a new cotter pin.
2. CONNECT STEERING KNUCKLE TO LOWER
SUSPENSION ARM
(a) Connect the steering knuckle to the lower suspension arm
with the nut.
Torque: 125 N Vm (1,270 kgf Vcm, 92 ft Vlbf)
(b) Install a new clip.
3. CONNECT TIE ROD END TO STEERING KNUCKLE
(a) Connect the tie rod end to the steering knuckle with the nut.
Torque: 49 N Vm (500 kgf Vcm, 36 ft Vlbf)
(b) Install a new cotter pin.
4. INSTALL FRONT BRAKE DISC AND CALIPER
(a) Align the matchmarks and install the brake disc to the axle
hub with the 2 screws.
(b) Install the brake caliper to the steering knuckle with the 2 bolts.
Torque: 118 N Vm (1,200 kgf Vcm, 87 ft Vlbf)
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SUSPENSION AND AXLE FRONT AXLE HUBSA±23
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