Lexus GS300/400 (2000 year). Manual — part 234

SR0E6–03

F03670

SST

SST

Oil Seal

W02101

Rack Teeth End

SST

R11307

SST

SR–52

–

STEERING

POWER STEERING GEAR

2222

REASSEMBLY

NOTICE:
When using a vise, do not overtighten it.
1.

COAT WITH POWER STEERING FLUID OR MOLYBDE-
NUM DISULFIDE LITHIUM BASE GREASE
(See page

SR–42

)

2.

INSTALL OIL SEAL

(a)

Coat a new oil seal lip with power steering fluid.

(b)

Using SST, press in the oil seal.
SST

09951–60010 (09951–00330, 09951–00490,
09952–06010), 09950–70010 (09951–07360)

Make sure to install the oil seal facing the correct
direction.

Take care that the oil seal does not get reversed as
you install it.

3.

INSTALL STEERING RACK

(a)

Install SST to the rack.
SST

09631–20102

HINT:
If necessary, scrape the burrs off the rack teeth end and bur-
nish.
(b)

Coat SST with power steering fluid.

(c)

Install the rack into the rack housing.

(d)

Remove the SST.

4.

INSTALL OIL SEAL

(a)

Install SST to the steering rack opposite end.
SST

09631–20102

(b)

Coat SST with power steering fluid.

(c)

Coat a new oil seal lip with power steering fluid.

(d)

Install the oil seal by pushing it onto the SST without tilt-
ing.

NOTICE:
Make sure to install the oil seal facing the correct direction.
(e)

Remove the SST.

F03656

SST

W00112

Cylinder End Stopper

Wooden
Block

W00113

Cylinder End Stopper

SST

F03657

SST

F03658

Vinyl Tape

–

STEERING

POWER STEERING GEAR

SR–53

2223

5.

INSTALL SPACER AND CYLINDER END STOPPER

(a)

Using SST and a hammer, drive in the spacer.
SST

09950–60010 (09951–00280, 09951–00420,
09952–06010), 09950–70010 (09951–07200)

(b)

Coat a new O–ring with power steering fluid, and install
it to the stopper.

(c)

Using a wooden block and hammer, drive in the stopper
until it is tightly installed.

NOTICE:
Be careful not to damage the O–ring.

(d)

Using SST, torque the stopper.
SST

09631–20120

Torque: 59 N·m (600 kgf·cm, 43 ft·lbf)

6.

AIR TIGHTNESS TEST

(a)

Install SST to the unions of the rack housing.
SST

09631–12071

(b)

Apply 53 kPa (400 mmHg, 15.75 in.Hg) 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 oil
seals.

7.

INSTALL CONTROL VALVE ASSEMBLY

(a)

Coat the teflon rings with power steering fluid.

(b)

To prevent oil seal lip damage, wind vinyl tape on the ser-
rated part of the control valve shaft.

(c)

Push the valve assembly into the control valve housing.

NOTICE:
Be careful not to damage the teflon rings and oil seal lip.

F03653

SST

F03654

F03659

17

°

F03660

SST

SR–54

–

STEERING

POWER STEERING GEAR

2224

(d)

Coat a new O–ring with power steering fluid, and install
it to the bearing guide nut.

(e)

Using SST, torque the nut.
SST

09631–20060

Torque: 25 N·m (250 kgf·cm, 18 ft·lbf)

NOTICE:
Be careful not to damage the oil seal lip.

(f)

Using a punch, stake the nut.

8.

INSTALL CONTROL VALVE HOUSING WITH CON-
TROL VALVE ASSEMBLY

(a)

Coat a new O–ring with power steering fluid, and install
it to the valve housing.

(b)

Align the matchmarks on the valve housing and rack
housing, and install the valve housing with the valve as-
sembly to the rack housing.

(c)

Torque the 2 bolts.
Torque: 18 N·m (185 kgf·cm, 13 ft·lbf)

9.

INSTALL DUST COVER

10.

INSTALL RACK GUIDE SUB–ASSEMBLY, RACK
GUIDE SPRING AND RACK GUIDE SPRING CAP

(a)

Apply sealant to 2 or 3 threads of the cap.
Sealant:
Part No. 08833–00080, THREE BOND 1344,
LOCTITE 242 or equivalent

(b)

Temporarily install the cap.

11.

ADJUST TOTAL PRELOAD

(a)

To prevent the steering rack teeth from damaging the oil
seal lip, temporarily install the RH and LH rack ends.

(b)

Torque the rack guide spring cap.
Torque: 25 N·m (250 kgf·cm, 18 ft·lbf)

(c)

Return the cap 17

°

.

(d)

Using SST, turn the control valve shaft right and left 1 or
2 times.
SST

09616–00010

(e)

Loosen the cap until the rack guide spring is not function-
ing.

F03661

SST

F03662

SST

Fulcrum
Length

R07337

Rack Groove

F03663

Fulcrum Length

SST

–

STEERING

POWER STEERING GEAR

SR–55

2225

(f)

Using SST and a torque wrench, tighten the cap until the
preload is within specification.
SST

09616–00010

Preload (turning):
0.5 –1.7 N·m (4.7–17.2 kgf·cm, 4.1–14.9 in.·lbf)

12.

INSTALL RACK GUIDE SPRING CAP LOCK NUT

(a)

Apply sealant to 2 or 3 threads of the nut.
Sealant:
Part No.08833–00080, THREE BOND 1344,
LOCTITE 242 or equivalent

(b)

Holding the rack guide spring cap rotating, and using
SST, torque the nut.
SST

09922–10010

Torque: 51 N·m (521 kgf·cm, 38 ft·lbf)

NOTICE:
Use SST 09922–10010 in the direction shown in the illustra-
tion.
HINT:
Use a torque wrench with a fulcrum length of 345 mm (13.58
in.).
(c)

Recheck the total preload.
Preload (turning):
0.5 –1.7 N·m (4.7–17.2 kgf·cm, 4.1–14.9 in.·lbf)

(d)

Remove the RH and LH rack ends.

13.

INSTALL RH AND LH CLAW WASHERS AND RACK
ENDS

(a)

Install a new washer, and temporarily tighten the rack
end.

HINT:
Align the claws of the washer with the steering rack grooves.

(b)

Using a spanner to hold the steering rack steady, and us-
ing SST, torque the rack end.
SST

09922–10010

Torque: 76 N·m (770 kgf·cm, 56 ft·lbf)

NOTICE:
Use SST 09922–10010 in the direction shown in the illustra-
tion.
HINT:
Use a torque wrench with a fulcrum length of 345 mm (13.58
in.).