LEXUS SC400 1991 Service Repair Manual

REAR SHOCK ABSORBER REMOVAL
SA0SC±02
1. JACK UP VEHICLE AND REMOVE REAR WHEEL
2. REMOVE REAR BRAKE CALIPER
(a) Remove the 2 bolts and remove the brake caliper from therear axle carrier.
(b) Hang up the brake caliper using wire, etc.
3. REMOVE SHOCK ABSORBER WITH COIL SPRING
(a) Remove the nut and bolt on lower side of the shock absorber.
(b) Remove the absorber cap.
(c) Loosen the nut in the middle of the suspension support.
NOTICE: Only loosen the nut, do not remove it.
(d) Remove the 3 nuts and shock absorber with the coil spring.
SA±108
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SUSPENSION AND AXLE REAR SUSPENSION
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4. REMOVE SUSPENSION SUPPORT AND COIL SPRING
(a) Install a bolt and 2 nuts to the bracket at the lower portion ofthe shock absorber shell and secure it in a vise.
(b) Using SST, compress the coil spring. SST 09727±30020
NOTICE: Do not use an impact wrench.
It will damage the SST.
(c) Remove the suspension support nut.
(d) Remove the suspension support, coil spring and insulator.
(e) R e m o v e t h e i n s u l a t o r a n d s p r i n g b u m p e r f r o m t h e suspension support.
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SUSPENSION AND AXLE REAR SUSPENSIONSA±109
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REAR SHOCK ABSORBER INSPECTION
SA0SD±03
INSPECT SHOCK ABSORBER
Compress and extend the shock absorber rod and check that
there is no abnormal resistance or unusual operation
sounds.
If there is any abnormality, replace the shock absorber with
a new one.
NOTICE: When discarding the shock absorber, use the
following procedure.
REAR SHOCK ABSORBER DISPOSAL
SA0SE±03
1. FULLY EXTEND SHOCK ABSORBER ROD
2. DRILL HOLE TO REMOVE GAS FROM CYLINDERUsing a drill, make a hole in the cylinder, as shown to remove
the gas inside.
CAUTION: The gas coming out is harmless, but be care-
ful of chips which may fly up when drilling.
REAR SHOCK ABSORBER
INSTALLATION
SA0WB±02
1. INSTALL SUSPENSION SUPPORT AND COIL SPRING
(a) Install the spring bumper to the suspension support.
(b) Install the insulator to the suspension support. HINT: Match the bolt of the suspension support with the cut±
off part of the insulator.
(c) Using SST, compress the coil spring. SST 09727±30020
NOTICE: Do not use an impact wrench.
It will damage the SST.
SA±110
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SUSPENSION AND AXLE REAR SUSPENSION
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(d) Install the coil spring to the shock absorber.HINT: Fit the lower end of the coil spring into the gap of the
spring seat of the shock absorber.
(e) Install the suspension support to the rod and temporarily tighten a new nut.
(f) Rotate the suspension support so that the rod and one of the bolts on suspension support are aligned with the lower
bushing.
(g) Remove the SST. HINT: After removing the SST, again check the direction of
the suspension support.
2. INSTALL SHOCK ABSORBER WITH COIL SPRING TO VEHICLE
(a) Install the shock absorber with the coil spring to the vehicle
with the 3 nuts.
Torque: 25 N Vm (260 kgf Vcm, 19 ft Vlbf)
(b) Torque the temporarily tightened nut in the middle of the
suspension support.
Torque: 27 N Vm (280 kgf Vcm, 20 ft Vlbf)
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SUSPENSION AND AXLE REAR SUSPENSIONSA±111
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3. INSTALL SHOCK ABSORBER TO REAR AXLE CARRIER
(a) Install the bolt from the rear vehicle.
(b) Temporarily install the nut.
4. INSTALL REAR BRAKE CALIPERInstall the brake caliper to the rear axle carrier with the 2 bolts.
Torque: 104 N Vm (1,065 kgf Vcm, 77 ft Vlbf)
5. STABILIZE SUSPENSION
(a) Install the rear wheel and lower vehicle
(b) Bounce the vehicle up and down several times to stabilize the
suspension.
(c) Jack up the vehicle and remove the rear wheel.
6. TIGHTEN BOLT AND NUT
(a) Support the lower arm with a jack.
(b) Tighten the bolt and nut.
Torque: 143 N Vm (1,460 kgf Vcm, 106 ft Vlbf)
7. INSTALL REAR WHEEL AND LOWER VEHICLE
Torqre: 137 N Vm (1,050 kgf Vcm, 101 ft Vlbf)
8. CHECK REAR WHEEL ALIGNMENT
(See page SA±10)
SA±112
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SUSPENSION AND AXLE REAR SUSPENSION
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UPPER SUSPENSION ARM
COMPONENTS
SA0SG±04
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SUSPENSION AND AXLE REAR SUSPENSIONSA±113
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REAR UPPER ARM REMOVAL
SA1A6±01
1. JACK UP VEHICLE AND REAR WHEEL
2. REMOVE REAR DRIVE SHAFT(See page SA±66)
3. REMOVE REAR BRAKE CALIPER
(a) Remove the 2 bolts and brake caliper from the rear axle hub.
(b) Hang up the brake caliper using wire, etc.
4. REMOVE ABS WIRE HARNESS CLAMP Remove the 2 bolts and ABS wire harness clamp.
5. REMOVE UPPER ARM
(a) Remove the nut.
(b) Using SST, disconnect the upper arm to the axle carrier. SST 09628±62011
NOTICE: Be careful not to damage the dust cover.
SA±114±
SUSPENSION AND AXLE REAR SUSPENSION
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(c) Remove the bolts and nuts and the upper arm.
UPPER SUSPENSION ARM BALL JOINT
INSPECTION
SA0SJ±04
INSPECT BALL JOINT FOR ROTATION CONDITION
(a) Flip the ball joint stud back and forth 5 ti mes, as shown in the
illustration, before installing the nut.
(b) Using torque wrench, turn the nut continuously one turn every 2±4 seconds and take the torque reading on the 5th
turn.
Torque (turning):
1.0 ± 3.4 N Vm (10 ± 35 kgf Vcm, 9 ± 30 in. Vlbf)
If not with in specification, replace the upper suspension arm.
UPPER ARM INSTALLATION
SA1A7±01
HINT: If replace the nut, assemble the nut and E±ring to the
washer with lock protrusion before install.
1. INSTALL UPPER ARM
(a) Install the upper arm to the body with the bolts and nuts. HINT: Install the tip of the nut lock facing down.
Torque: 164 N Vm (1,670 kgf Vcm, 121 ft Vlbf)
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SUSPENSION AND AXLE REAR SUSPENSIONSA±115
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(b) Connect the upper arm to the axle carrier with a new nut.
Torque: 109 NVm (1,100 kgf Vcm, 80 ft Vlbf)
2. INSTALL REAR DRIVE SHAFT
(See page SA±66)
3. INSTALL ABS WIRE HARNESS CLAMP Connect the ABS wire harness clamp to the upper arm with
the two bolts.
4. INSTALL BRAKE CALIPER Install the brake caliper to the rear axle carrer with the 2 bolts.
Torque: 104 N Vm (1,065 kgf Vcm, 77 ft Vlbf)
5. INSTALL REAR WHEEL AND LOWER VEHICLE
SA±116
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SUSPENSION AND AXLE REAR SUSPENSION
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LOWER SUSPENSION ARM AND
STRUT ROD
COMPONENTS
SA0SL±03
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SUSPENSION AND AXLE REAR SUSPENSIONSA±117
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