ABS LEXUS SC400 1991 Service Repair Manual

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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(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
±
SUSPENSION AND AXLE REAR SUSPENSION
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(c) Place matchmarks on the adjusting cam and body.
(d) Remove the adjusting cam and nut.
(e) Remove the lower suspension arm.
5. REMOVE NO.2 LOWER SUSPENSION ARM
(a) Remove the bolt and nut, disconnect the shock absorber.
(b) Remove the nut and disconnect the stabilizer bar link.
(c) Remove the nut.
(d) Using SST, disconnect the lower suspension arm from theaxle carrier.
SST 09610±20012
NOTICE: Be careful not to damage the dust cover.
(e) Place matchmarks on the adjusting cam and body.
(f) Remove adjusting cam and nut and the lower suspensionarm.
±
SUSPENSION AND AXLE REAR SUSPENSIONSA±119
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(e) Temporarily connect the shock absorber to the lower arm with
the bolt and nut.
(f) Connect the stabilizer bar link to the lower suspension arm with the nut.
Torque: 74 N Vm (750 kgf Vcm, 54 ft Vlbf)
2. INSTALL NO.1 LOWER SUSPENSION ARM
(a) Install the lower suspension arm to the axle carrier with a new
nut.
Torque: 59 N Vm (600 kgf Vcm, 43 ft Vlbf)
(b) Connect the lower suspension arm to the body.
(c) Temporarily install the adjusting cam and nut.
(d) Align the matchmarks on the adjusting cam and body.
3. INSTALL STRUT ROD
(a) Temporarily install the strut rod to the body with the bolt and
nut.
±
SUSPENSION AND AXLE REAR SUSPENSIONSA±121
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TORQUE SPECIFICATIONS
SA0WG±03
(FRONT)
\
 \
Part tightened NVm kgf Vcm ft Vlbf
\
 \
Hub nut 103 1,050 76
\
 \
Front and rear adjusting cam bolt 226 2,300 166
\
 \
Axle hub lock nut 199 2,030 147
\
 \
Lower ball joint X Steering knuckle 125 1,270 92
\
 \
Tie rod end X Steering knuckle 49 500 36
\
 \
Steering knuckle X Upper suspension arm 103 1,050 76
\
 \
Lower ball foint X Lower suspension arm 127 1,300 94
\
 \
Disc brake caliper X Steering knuckle 11 8 1,200 87
\
 \
Speed sensor set bolt 103 80 76 in. Vlbf
\
 \
Front shock absorber X Body 35 360 26
\
 \
Front shock absorber X Lower suspension arm 143 1,460 106
\
 \
Upper suspension arm mounting nut 164 1,670 121
\
 \
Piston rod lock nut 29 300 22
\
 \
Stabilizer link X Lower suspension arm 74 750 54
\
 \
Stabilizer link X Stabilizer bar 74 750 54
\
 \
Stabilizer bar bracket X Body 18 180 13
\
 \
Steering knuckle X Disc brake dust cover 19 195 14
(REAR)
\
 \
Part tightened N Vm kgf Vcm ft Vlbf
\
 \
Shock absorber X Lower suspension arm 143 1,460 106\
 \
Upper arm X Body 164 1,670 271\
 \
Rear axle carrier X Brake caliper 104 1,065 77\
 \
No. 1 lower arm X Rear axle carrier 59 600 43\
 \
No. 1 lower arm X Body 184 1,880 136
\
 \
No. 2 lower arm X Rear axle carrier 150 1,525 11 0
\
 \
No. 2 lower arm X Body 184 1,880 136
\
 \
Strut rod X Rear axle carrier 184 1,880 136
\
 \
Strut rod X Body 184 1,880 136
\
 \
Rear drive shaft X Axle hub 289 2,950 213
\
 \
Upper ball joint X Rear axle carrier 109 1,110 80
\
Parking brake backing plate X Rear axle carrier2626019\
 \
Rear drive shaft X Differential 83 850 64\
 
\

\
Differential mounting bolt \
Front
Rear 

147
142 

1,500
1,450 

108
105
\
 \
Differential carrier cover set bolt 47 475 34
\
 \
Suspension support X Body 27 280 20
\
 \
Suspension support X Shock absorber rod 27 280 20
\
 \
Stabilizer bar link nut 74 750 54
\
 \
Stabilizer bar bushing retainer bolt 28 290 21
±
SUSPENSION AND AXLE SERVICE SPECIFICATIONSSA±129
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4. CHECK WHEEL BEARING LOOSENESS
(a) Check the backlash in bearing shaft direction.
Maximum: 0.05 mm (0.0020 in.)
(b) Check the axle hub deviation.
Maximum: 0.05 mm (0.0020 in.)
5. CHECK FRONT SUSPENSION FOR LOOSENESS
6. CHECK STEERING LINKAGE FOR LOOSENESS
7. CHECK BALL JOINT FOR EXCESSIVE LOOSENESS
8. CHECK SHOCK ABSORBER WORK PROPERLYwCheck for oil leak
w Check mounting busings for wear
w Bounce front and rear of the vehicle
SA±4
±
SUSPENSION AND AXLE GENERAL INSPECTION
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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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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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(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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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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