LEXUS SC400 1991 Service Repair Manual

GEAR HOUSING
(SC400)
GEAR HOUSING REMOVAL AND
INSTALLATION
SR0GG±03
Remove and install the parts, as shown.
MAIN POINTS OF REMOVAL AND
INSTALLATION
NOTICE: When disconnecting the intermediate shaft
during removal of the gear housing, remove the steering
wheel and perform centering of the spiral cable.
(See page SR±11)
If the operation is performed without removing the steer-
ing wheel, use the procedure below to make sure the
steering w heel is firmly fixed in position and cannot turn.
SR±142
±
STEERING POWER STEERING
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1. DISCONNECT INTERMEDIATE SHAFT
(a) Position the front wheels facing straight ahead.
(b) Using the seat belt of the driver's seat, fix the steering wheelso that it does not turn.
(c) Place matchmarks on the intermediate shaft and control valve shaft.
(d) Loosen the bolt on the upper side of the intermediate shaft,
remove the bolt on the lower side and disconnect the
intermediate shaft.
2. DISCONNECT TIE ROD ENDS
(a) Remove the cotter pin and nut.
(b) Using SST, disconnect the tie rod end from the knuckle arm. SST 09628±62011
3. CONNECT INTERMEDIATE SHAFT
(a) Set the gear housing so that it matches the dimensions shown below, with the gear housing at the center point.
±
STEERING POWER STEERINGSR±143
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(b) Align matchmarks on the intermediate shaft and control valve
shaft and connect them.
Torque: 35 N Vm (360 kgf Vcm, 36 ft Vlbf)
4. CONNECT PRESSURE AND RETURN TUBES
After inserting the rotation stopper in the valve housing holes,
tighten the union bolts.
Torque: 49 N Vm (500 kgf Vcm, 36 ft Vlbf)
5. CENTER SPIRAL CABLE
If the steering wheel has been removed, or the steering
wheel may have moved during the operation, always perform
centering of the spiral cable.
(See page SR±11)
6. CHECK STEERING WHEEL CENTER POINT
7. BLEED POWER STEERING SYSTEM (See page SR±115)
8. CHECK TOE±IN (See page SA±5)
SR±144
±
STEERING POWER STEERING
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(SC300)
GEAR HOUSING REMOVAL AND
INSTALLATION
SR0GH±03
Remove and install the parts, as shown.
MAIN POINTS OF REMOVAL AND
INSTALLATION
NOTICE: When disconnecting the intermediate shaft during
removal of the gear housing, remove the steering wheel and
perform centering of the spring cable.
(See page SR±11)
If the operation is performed without removing the steer-
ing wheel, use the procedure below to make sure the
steering w heel is firmly fixed in position and cannot turn.
1. DISCONNECT INTERMEDIATE SHAFT
(a) Position the front wheels facing straight ahead.
(b) Using the seat belt of the driver's seat, fix the steering wheel so that it does not turn.
±
STEERING POWER STEERINGSR±145
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(c) Place matchmarks on the intermediate shaft and controlvalve shaft.
(d) Loosen the bolt on the upper side of the intermediate shaft, remove the bolt on the lower side and disconnect the
intermediate shaft.
2. DISCONNECT TIE ROD ENDS
(a) Remove the cotter pin and nut.
(b) Using SST, disconnect the tie rod end from the knuckle arm. SST 09628±62011
3. CONNECT INTERMEDIATE SHAFT
(a) Set the gear housing so that it matches the dimensions shown below, with the gear housing at the center point.
(b) Align matchmarks on the intermediate shaft and control valve
shaft and connect them.
Torque: 35 N Vm (360 kgf Vcm, 26 ft Vlbf)
SR±146±
STEERING POWER STEERING
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4. CONNECT PRESSURE AND RETURN TUBESAfter inserting the rotation stopper in the valve housing holes,
tighten the union bolts.
Torque: 46 N Vm (500 kgf Vcm, 36 ft Vlbf)
5. CENTER SPIRAL CABLE
If the steering wheel has been removed, or the steering
wheel may have moved during the operation, always perform
centering of the spiral cable.
(See page SR±11)
6. CHECK STEERING WHEEL CENTER POINT
7. BLEED POWER STEERING SYSTEM (See page SR±115)
8. CHECK TOE±IN
(See page SA±5)
±
STEERING POWER STEERINGSR±147
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COMPONENTS
SR0GJ±02
SR±148±
STEERING POWER STEERING
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SECTIONAL VIEW
SR0GK±01
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STEERING POWER STEERINGSR±149
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STEERING GEAR HOUSING
DISASSEMBLY
SR0GL±02
1. CLAMP GEAR HOUSING IN VISEUsing SST, secure the steering gear in a vise.
SST 09612±00012
2. REMOVE RIGHT AND LEFT TURN PRESSURE TUBES
(a) Remove the union bolt and gaskets.
(b) Using SST, remove the pressure tube. SST 09633±00020
(c) Remove the union seat.
3. REMOVE TIE ROD ENDS
(a) Loosen the lock nut and place matchmarks on the tie rod end
and rack end.
(b) Remove the tie rod end and rack guide spring cap lock nut.
4. REMOVE RACK BOOTS, CLAMPS AND CLIPS
(a) Remove the clip and clamp.
(b) Remove the rack boot.
(c) Mark the left and right boot.
5. REMOVE RACK ENDS AND CLAW WASHERS
(a) Unstake the claw washer.
NOTICE: Avoid any impact to the rack.
SR±150±
STEERING POWER STEERING
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(b) Using SST, remove the rack end.SST 09612±24014 (09617±24011)
09617±14010
(c) Remove the claw washer.
6. REMOVE RACK GUIDE SPRING LOCK NUT
Using SST, remove the rack guide spring cap lock nut.
SST 09612±24014 (09617±24020)
7. REMOVE RACK GUIDE SPRING CAP Using SST, remove the rack guide spring cap.
SST 09612±24014 (09612±10022)
8. REMOVE RACK GUIDE SPRING, RACK GUIDE AND RACK GUIDE SEAT
9. REMOVE RACK HOUSING CAP
±
STEERING POWER STEERINGSR±151
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