torque LEXUS SC400 1991 Service Repair Manual

(e) Using snap ring pliers, install a new snap ring.
5. AIR TIGHTNESS TEST
(a) Install SST to the unions of the rack housing.SST 09631±12071
(b) Apply 53.3 kPa (400 mmHg, 15.75 inVHg) of vacuum for about 30 seconds.
(c) Check that there is no change in the vacuum. If there is change in the vacuum, check the installation of the
rack housing oil seals.
6. INSTALL CONTROL VALVE
(a) Coat the teflon rings with power steering fluid.
(b) Push the control valve into the rack housing.
7. INSTALL CONTROL VALVE HOUSING
(a) Coat a new O±ring with power steering fluid, and install it to the valve housing.
(b) Using a hexagon wrench, tighten the 2 bolts.
Torque: 18 N Vm (185 kgf Vcm, 13 ft Vlbf)
NOTICE: To prevent oil seal lip damage, wind vinyl tape on the
serration part of the control valve shaft.
8. INSTALL LOWER BEARING AND SPACER
±
STEERING POWER STEERINGSR±159
WhereEverybodyKnowsYourName

9. INSTALL SELF±LOCKING NUTUsing SST to hold the control valve shaft, install a new self±
locking nut.
SST 09616±00010
Torque: 39 N Vm (400 kgf Vcm, 29 ft Vlbf)
10. INSTALL RACK HOUSING CAP
(a) Apply sealant to 2 or 3 threads of the cap.
Sealant:
Part No. 08833±00080, THREE BOND 1344, LOCTITE
242 for equivalent
(b) Install the cap.
Torque: 69 N Vm (700 kgf Vcm, 51 ft Vlbf)
11. INSTALL RACK GUIDE SEAT, RACK GUIDE AND RACK
GUIDE SPRING
12. ADJUST TOTAL PRELOAD
(a) Apply sealant to 2 or 3 threads of the spring cap.
Sealant: Part No. 08833±00080, THREE BOND 1344, LOCTITE
242 or equivalent
(b) Using SST, install and torque the spring cap.SST 09612±24014 (09612±10022)
Torque: 25 N Vm (250 kgf Vcm, 18 ft Vlbf)
(c) Using SST, return the rack guide spring cap 125
SST 09612±24014 (09612±10022)
(d) Using SST, turn the control valve shaft right and left 1 or 2
times.
SST 09616±00010
(e) Loosen the spring cap until the rack guide compression spring is not functioning.
SR±160
±
STEERING POWER STEERING
WhereEverybodyKnowsYourName

(f) Using SST and a torque meter, tighten the rack guide springcap until the preload is within specification.
SST 09612±24014 (09612±10022)
09616±00010
Preload (turning):
0.9±1.9 N Vm (9±20 kgf Vcm 7.9±17.3 in. Vlbf)
13. INSTALL RACK GUIDE SPRING CAP LOCK NUT
(a) Apply sealant to 2 or 3 threads of the lock nut.
Sealant:
Part No. 08833±00080, THREE BOND 1344, LOCTITE
242 or equivalent
(b) Using SST, install and torque the lock nut.SST 09612±24014 (09612±10022, 09617±24020)
Torque: 56 N Vm (570 kgf Vcm, 41 ft Vlbf)
HINT: Use a torque wrench with a fulcrum length of 340 mm
(13.39 in.).
(c) Recheck the total preload.
Preload (turning):
0.9±1.9 N Vm (9±20 kgf Vcm 7.9±17.3 in. Vlbf)
14. INSTALL DUST COVER
15. INSTALL CLAW WASHERS AND RACK ENDS
(a) Install new claw washer.
HINT: Align the claws of the claw washer with the rack
grooves.
(b) Using SST, install and torque the rack end. SST 09612±24014 (09617±24011)
09617±14010
Torque: 92 N Vm (940 kgf Vcm, 68 ft Vlbf)
HINT: Use a torque wrench with a fulcrum length of 340 mm
(13.39 in.).
(c) Using a brass bar and hammer, stake the claw washer.
±
STEERING POWER STEERINGSR±161
WhereEverybodyKnowsYourName

16. INSTALL RACK BOOTS, CLAMPS AND CLIPS
(a) Ensure that the tube hole is not clogged with grease.HINT: If the tube hole is clogged, the pressure inside the boot
will change after it is assembled and the steering wheel
turned.
(b) Install the boot.
NOTICE: Be careful not to damage or twist the boot.
(c) Install the clamp and clip to the boot.
17. INSTALL TIE ROD ENDS
(a) Screw the lock nut and tie rod end onto the rack end until the matchmarks are aligned.
(b) After adjusting toe±in, torque the lock nut.
Torque: 56 N Vm (570 kgf Vcm, 41 ft Vlbf)
18. INSTALL RIGHT AND LEFT TURN PRESSURE TUBES
(a) Install a new union seat.
(b) Using SST, tighten nut.
SST 09633±00020
Torque: 24 N Vm (240 kgf Vcm, 17 ft Vlbf)
HINT: Use a torque wrench with a fulcrum length of 300 mm
(11.81 in.).
(c) Install the union bolt over the new gaskets and torque it.
Torque: 34 N Vm (350 kgf Vcm, 25 ft Vlbf)
SR±162±
STEERING POWER STEERING
WhereEverybodyKnowsYourName

\
 \

Flow control valve spring length (SC 400) STD\
\
37 mm (1.46 in.)
\
 \
Flow control valve spring length (SC 400) Minimum\
\
36 mm (1.42 in.)
\
 \
Flow control valve spring length (SC 300) STD\
\
35 mm (1.38 in.)
\
 \
Flow control valve spring length (SC 300) Minimum\
\
33 mm (1.30 in.)
\
 \
Pump rotating torque (SC 400)\
\
0.1 NVm (1.0 kgf Vcm, 0.9 in. Vlbf) or less
\
 \
Pump rotating torque (SC 300)\
\
0.2 N Vm (2.5 kgf Vcm, 2.2 in. Vlbf) or less
\
 \
PS GEAR HOUSING\
\
\
 \
Steering rack runout Maximum\
\
0.3 mm (0.012 in.)
\
 \
Total preload\
\
0.9±1.9 N Vm (9±20 kgf Vcm, 7.9±17.3 in. Vlbf)
\
 \
Solenoid valve resistance\
\
6±11

SR±170±
STEERING SERVICE SPECIFICATIONS
WhereEverybodyKnowsYourName

TORQUE SPECIFICATIONS
SR0GQ±01\
 \
Part tightened NVm kgf Vcm ft Vlbf\
 \
STEERING COLUMN   
\
 \
Steering wheel 35 360 26\
 \
Steering wheel pad 7.4 75 65 in. Vlbf\
 \
Column bracket X Body 25 260 19\
 \
Sliding yoke 35 360 26\
 \
(Power tilt and power telescopic steering column)   
\
 \
Tilt steering housing support X Lower tube 13 130 9\
 \
Support stopper bolt lock nut 2.9 30 26 in. Vlbf\
 \
Connector bracket 4.9 50 43 in. Vlbf\
 \
Telescopic sensor plate 4.9 50 43 in. Vlbf\
 \
Telescopic adjusting screw 6.9 70 61 in. Vlbf\
 \
Telescopic adjusting screw lock nut 31 320 23\
 \
(Manual tilt and Manual telescopic steering column)   
\
 \
Tilt memory bolt 6.4 65 56 in. Vlbf\
 \
Tilt memory bolt set nut 5.9 60 52 in. Vlbf\
 \
Tilt lever assembly installation bolt 2.9 30 26 in. Vlbf\
 \
Tilt pawl set nut 5.9 60 52 in. Vlbf\
 \
Tilt lever retainer set nut 15 150 11\
 \
Compression spring bushing bolt 7.8 80 69 in. Vlbf\
 \
Steering column tube stopper bolt 19 195 14\
 \
Serration attachment set nut 13 130 9\
 \
Telescopic lever set bolt 25 260 19\
 \
Connector bracket set bolt 4.9 50 43 in. Vlbf\
 \
POWER STEERING PUMP   
\
 \
(SC 400)   
\
 \
PS pump installation bolt 39 400 29\
 \
PS pump installation nut 43 440 32\
 \
Pressure tube X Pressure port union 49 500 36\
 \
Drive pulley X Rotor shaft 43 440 32\
 \
Front housing X Rear bracket 39 400 29\
 \
Pressure port union X Pump housing 69 700 51\
 \
Suction port union X Pump housing 13 130 9\
 \
(SC 300)   
\
 \
PS pump installation bolt 58 590 43\
 \
Pressure tube X Pressure port union 49 500 36\
 \
Drive pulley X Rotor shaft 43 440 32\
 \
Front housing X Rear housing 17 170 12\
 \
Pressure port union X Pump housing 83 850 61\
 \
Reservoir tank X Pump housing Front side bolt 13 130 9\
 \
Rear side bolts 17 170 12
±
STEERING SERVICE SPECIFICATIONSSR±171
WhereEverybodyKnowsYourName

PREPARATION
SST (SPECIAL SERVICE TOOLS)
SR0EE±04SR0EF±03
RECOMMENDED TOOLS
EQUIPMENT
SR0EG±02
\
 
\

\

Torque wrench 


±
STEERING STEERING COLUMNSR±7
WhereEverybodyKnowsYourName

4. CENTER SPIRAL CABLE
(a) Check that the front wheels are facing straight ahead.
(b) Turn the spiral cable counterclockwise by hand until it
becomes harder to turn the cable.
(c) Then rotate the spiral cable clockwise about 3 turns to align the red mark.
HINT: The spiral cable will rotate about 3 turns to either left
or right of the center.
5. INSTALL STEERING WHEEL
(a) Align matchmarks on the steering wheel and main shaft, and install the wheel to the shaft.
(b) Tighten the wheel set nut.
Torque: 35 N Vm (360 kgf Vcm, 26 ft Vlbf)
(c) Connect the connector.
6. INSTALL STEERING WHEEL PAD
(a) Connect the Airbag connector.
(b) Install the pad after confirming that the circumference groove
of the torx screws is caught on the screw case.
(c) Using a torx wrench, tighten the 4 torx screws.
Torque: 7.4 N Vm (75 kgf Vcm, 65 in. Vlbf)
NOTICE:
w Make sure the wheel pad is installed to the specified
torque.
w If the wheel pad has been dropped, or there are cracks,
dents or other defects in the case or connector, replace
the wheel pad with a new one.
w When installing the wheel pad, take care that the wiring
does not interfere with other parts and is not pinched
between other parts.
7. CHECK STEERING WHEEL CENTER POINT
8. CONNECT NEGATIVE (±) TERMINAL CABLE TO
BATTERY
±
STEERING STEERING COLUMNSR±11
WhereEverybodyKnowsYourName

(c) Using SST to compress the compression spring.SST 09950±20017 (09956±00010)
(d) Using snap ring pliers, install a new snap ring.
3. INSTALL TILT MEMORY BOLT
(a) Install the square nut and tilt memory bolt.
(b) Using a hexagon wrench, torque the tilt memory bolt.
Torque: 6.4 N Vm (65 kgf Vcm, 56 in. Vlbf)
4. SELECT TILT STEERING BOLTS
Select the bolt with the plain thread end when the upper col-
umn tube mark is 2, and the bolt with the hollow±tipped
thread end when the mark is 1.
5. INSTALL MAIN SHAFT WITH UPPER COLUMN TUBE
(a) Install the main shaft with the upper column tube into the lower column tube.
(b) Using a vise, press in the 2 tilt steering bolts. HINT: Make sure the upper tube turns smoothly.
SR±20
±
STEERING STEERING COLUMN
WhereEverybodyKnowsYourName

6. INSTALL TILT LEVER LOCK SHAFT, TILT LEVERASSEMBLY, TILT SUB LEVER AND TILT LEVER
(a) Install the tilt lever lock shaft into the upper column tube.
(b) Install the tilt lever assembly.
(c) Install the tilt lever and tilt sub lever.
7. INSTALL TILT PAWLS
(a) Install the 2 tilt pawls to the upper column tube. HINT: Install the pawl pin into the long hole of the tilt lever and
tilt sub lever.
(b) Install the bolt through the tilt pawls and tilt lever assembly.
(c) Temporarily install the washer and nut.
(d) Install and torque the tilt lever assembly installation bolt.
Torque: 2.9 N Vm (30 kgf Vcm, 26 in. Vlbf)
8. ENGAGE AND ADJUST TILT PAWL
(a) Engage the tilt sub lever side pawl to the center of the ratchet.
(b) While turning the tilt lever side collar, completely engage the
tilt lever side pawl to the ratchet.
(c) Place matchmarks on the pawl and collar.
(d) Remove the nut and washer.
(e) Pull out the bolt.
±
STEERING STEERING COLUMNSR±21
WhereEverybodyKnowsYourName