Lexus SC300 / Lexus SC400. Manual - part 750

STEERING GEAR HOUSING
DISASSEMBLY

SR0GL–02

1. 

CLAMP GEAR HOUSING IN VISE
Using 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

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STEERING

POWER STEERING

(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

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STEERING

POWER STEERING

SR–151

10.  REMOVE SELF–LOCKING NUT

Using SST to hold the control valve shaft, remove the self–
locking nut.
SST 09616–00010

11.  REMOVE DUST COVER

12.  REMOVE CONTROL VALVE HOUSING
(a)  Using a hexagon wrench, remove the 2 bolts.
(b)  Pull out the valve with the valve housing.
(c)  Remove the O–ring from the valve housing.

13.  REMOVE CONTROL VALVE

Using a plastic hammer, tap out the control valve.

14.  REMOVE LOWER BEARING AND SPACER

15. REMOVE CYLINDER END STOPPER, SPACERS, OIL

SEAL AND RACK

(a)  Using snap ring pliers, remove the snap ring.

SR–152

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STEERING

POWER STEERING

(b)  Using SST, press the rack until the end stopper slightly

touches the press block.
SST 09612–24014 (09612–10061)

(c)  Slightly tap the rack end with a brass bar and hammer.
(d)  Pull out the rack with cylinder end stopper, 2 spacers and oil

seal.

16.  REMOVE RACK HOUSING OIL SEAL AND SPACER

Using SST, tap out the oil seal and spacer.
SST 09631–12020, 09631–20031

GEAR HOUSING COMPONENTS
INSPECTION AND REPAIR

SR0NZ–01

1. INSPECT 

RACK

(a)  Using a dial indicator, check the rack for runout and for teeth

wear or damage.

Maximum runout:

0.3 mm (0.012 in.)

(b)  Check the back surface for wear or damage.

If faulty, replace it.

2.  IF NECESSARY, REPLACE RACK HOUSING BEARING

AND OIL SEAL

(a)  Using SST, remove the bearing.

SST 09612–30012

NOTICE: Be careful not to damage the rack housing.

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STEERING

POWER STEERING

SR–153