Lexus SC300 / Lexus SC400. Service manual - part 743

–

STEERING

POWER STEERING

SR–111

RECOMMENDED TOOLS

SR0FW–03

LUBRICANT

SR015–05

ÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑ

Item

ÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑ

Capacity

ÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑ

Classification

ÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑ

Power steering fluid

1 0 liters (1 1 US qts 0 9 lmp qts)

ATF DEXRON



II

ÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑ

Total

1.0 liters (1.1 US qts, 0.9 lmp.qts)

ATF DEXRON



 II

EQUIPMENT

SR0FX–01

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

Caliper gauge

ÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑ

Power steering pump

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

Dial indicator

Steering rack

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

Micrometer

Power steering pump

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

Oil pressure gauge

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

Torque wrench

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

Vacuum gauge

Gear housing

SSM (SPECIAL SERVICE MATERIALS)

SR0FY–01

ÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑ

08833–00080

ÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑ

Adhesive 1344,

ÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑ

Rack housing cap

ÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑ

THREE BOND 1344,

ÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑ

Rack guide spring cap

ÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑÑ

LOCTITE 242 or equivalent

ÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑ

ÑÑÑÑÑÑÑÑÑÑÑÑ

Rack guide spring cap lock nut

SR–112

–

STEERING

POWER STEERING

ON–VEHICLE INSPECTION
CHECK IDLE–UP

SR0FZ–04

1. 

WARM UP ENGINE

2. 

TURN AIR CONDITIONER SWITCH OFF

3. CHECK 

IDLE–UP

(a)  Fully turn the steering wheel.
(b)  Check that the engine rpm decreases when the air control

valve hose is pinched.

(c)  Check that the engine rpm increases when the air control

valve hose is released.

FLUID LEVEL CHECK

SR0G0–03

1. 

KEEP VEHICLE LEVEL

2. 

BOOST FLUID TEMPERATURE
With the engine idling at 1,000 rpm or less, turn the steering
wheel from lock to lock several times to boost fluid tempera-
ture.

Fluid temperature:

80

°

C (176

°

F)

3. STOP 

ENGINE

4. 

CHECK FOR FOAMING OR EMULSIFICATION
HINT: Foaming and emulsification indicate either the exis-
tence of air in the system or that the fluid level is too low.

5. 

CHECK FLUID LEVEL IN OIL RESERVOIR
Check the fluid level and add fluid if necessary.

Fluid:

ATF DEXRON



 II

HINT: Check that the fluid level is within the HOT LEVEL of
the dipstick of the reservoir cap. If the fluid is cold, check that
it is within the COLD LEVEL of the dipstick.

–

STEERING

POWER STEERING

SR–113

POWER STEERING FLUID
REPLACEMENT

SR0G1–04

1. 

JACK UP FRONT OF VEHICLE AND SUPPORT IT WITH
STANDS

2. 

REMOVE FLUID RETURN HOSE FROM OIL RESERVOIR
AND DRAIN FLUID INTO CONTAINER

NOTICE: Take care not to spill fluid on the drive belt.

3. 

TURN STEERING WHEEL FROM LOCK TO LOCK WHILE
DRAINING FLUID

4. 

FILL OIL RESERVOIR WITH FRESH FLUID

Fluid:

ATF DEXRON



 II

5. 

START ENGINE AND RUN IT AT 1,000 RPM
After 1 or 2 seconds, fluid will begin to discharge from the re-
turn hose. Stop the engine immediately at this time.

NOTICE: Take care that some fluid remains left in the oil reser-

voir.

6. 

REPEAT STEPS 4 AND 5 FOUR OR FIVE TIMES UNTIL
THERE IS NO MORE AIR IN FLUID

7. 

CONNECT RETURN HOSE TO OIL RESERVOIR

8. 

BLEED POWER STEERING SYSTEM
(See page 

SR–115

)

SR–114

–

STEERING

POWER STEERING