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Home >> Lexus >> 2009 >> SC 430 V8-4.3L (3UZ-FE) >> Repair and Diagnosis >> Steering and Suspension >> Steering >> Steering Gear >> Service and Repair >> Overhaul >> Disassembly

Disassembly








POWER STEERING: RACK AND PINION POWER STEERING GEAR: DISASSEMBLY

DISASSEMBLY

1. FIX RACK AND PINION POWER STEERING GEAR ASSEMBLY





(a) Using union nut wrench, remove the steering right turn pressure tube and steering left turn pressure tube.
(b) Remove the steering turn pressure tube union seat from the power steering rack housing.





(c) Using SST, secure the rack and pinion power steering gear in a vise as shown in the illustration.
SST: 09612-00012





2. REMOVE TIE ROD ASSEMBLY LH
(a) Place matchmarks on the tie rod LH and rack end.
(b) Loosen the lock nut, and remove the tie rod LH lock nut.
3. REMOVE TIE ROD ASSEMBLY RH
HINT: Use the same procedures described for the LH side.

4. REMOVE STEERING RACK BOOT CLIP
(a) Remove the 2 boot clips.





5. REMOVE NO. 1 STEERING RACK BOOT CLAMP
(a) Using pliers, loosen the clamp as shown in the illustration.
NOTE:
Be careful not to damage the steering rack boot.

6. REMOVE NO. 2 STEERING RACK BOOT CLAMP
HINT: Use the same procedures described for the No. 1 boot clamp.

7. REMOVE NO. 1 STEERING RACK BOOT
(a) Remove the clip and rack boot.
HINT: Mark the No. 1 and No. 2 rack boots.

8. REMOVE NO. 2 STEERING RACK BOOT
HINT: Use the same procedures described for the No. 1 steering rack boot.

9. REMOVE STEERING RACK END SUB-ASSEMBLY





(a) Using a screwdriver and hammer, unstake the washer.
NOTE:
Avoid any impact to the steering rack.





(b) Using a wrench, hold the steering rack steadily. Using SST, remove the rack end.
SST: 09922-10010
NOTE:
Rotate SST in the direction shown in the illustration.

(c) Use the same procedure described for the other side.
HINT: Mark the RH and LH rack ends.

10. REMOVE STEERING RACK END CLAW WASHER
(a) Remove the 2 steering rack end claw washers.





11. REMOVE STEERING RACK GUIDE
(a) Using SST, remove the cap nut.
SST: 09922-10010
NOTE:
Rotate SST as shown in the illustration.

(b) Remove the spring cap, rack guide spring, conical spring washer and rack guide.
(c) Remove the rack guide seat from the rack guide.
12. REMOVE POWER STEERING CONTROL VALVE





(a) Remove the steering gear dust cover.
(b) Place the matchmarks on the control valve housing and rack housing.
(c) Remove the 2 bolts.
(d) Pull out the control valve with the control valve housing.
(e) Remove the O-ring from the rack housing.





(f) Using SST, loosen the bearing guide nut.
SST: 09631-20060





(g) Wind vinyl tape around the control valve shaft.
(h) Using a plastic-faced hammer, tap out the control valve (with bearing guide nut) from the control valve housing.
NOTE:
Be careful not to damage the oil seal lip.

(i) Remove the bearing guide nut from the power steering control valve.
NOTE:
Be careful not to damage the oil seal lip.

(j) Remove the O-ring from the bearing guide nut.





(k) Using a screwdriver, remove the 4 control valve rings from the control valve.
NOTE:
Be careful not to damage the grooves of the control valve ring.





13. REMOVE POWER STEERING CONTROL VALVE UPPER OIL SEAL
(a) Using SST, press out the oil seal and bearing from the control valve housing.
SST: 09950-60010
09951-00260
SST: 09950-70010
09951-07150





14. REMOVE POWER STEERING CONTROL VALVE LOWER OIL SEAL
(a) Using SST, press out the oil seal from the bearing guide nut.
SST: 09950-60010
09951-00320
SST: 09950-70010
09951-07100





15. REMOVE CYLINDER END STOPPER
(a) Using SST, remove the stopper.
SST: 09631-20090
(b) Remove the O-ring from the stopper.





16. REMOVE POWER STEERING RACK
(a) Using SST, press out the steering rack, housing spacer and rack housing oil seal.
NOTE:
Take care not to drop the power steering rack.

(b) Remove the cylinder housing spacer and rack housing oil seal from the steering rack.
17. REMOVE POWER STEERING CYLINDER TUBE OIL SEAL





(a) Install SST (09612-07130) on SST (09612-07210).
SST: 09612-70100
09612-07130
09612-07210
NOTICE:
- Before using SSTs, apply a small dab of grease to the inside wall of SSTs (09612-07210, 09612-07130).
- To prevent the inside of the housing from being damaged, securely install SSTs together.





(b) Diagonally insert SST (09612-07210) into the housing until it contacts with the oil seal, and then further insert SST (09612-07210) until the tip of SST (09612-07220) contacts with SST (09612-07130).
NOTE:
Do not damage the inside of the housing.





(c) Secure SST (09612-07220), and pull SST (09612-07210) to place SST (09612-07130) in the housing.
HINT: Place SST on the chamfering position between the oil seal and rack housing.

(d) Remove SST (09612-07210, 09612-07220).





(e) After installing SST (09612-07240) on SST (09612-07210), insert the tip of SST (09612-07230) in the service hole of SST (09612-07130).
- Before using SSTs, apply a small dab of grease to the tip of SSTs (09612-07230).
- To prevent SST (09612-07130) from being damaged, be sure to install SST (09612-07240).
- Do not damage the inside of the rack housing.





(f) Install SST (09951-07100) on SST (09612-07230) and remove the oil seal using a press.
NOTE:
Do not damage the rack housing.
HINT: Replace SST (09951-07100) with SST that is different in length in the set, if necessary.





18. REMOVE POWER PISTON OIL SEAL
(a) Using a screwdriver, remove the oil seal and O-ring from the steering rack.
NOTE:
Be careful not to damage the groove of the oil seal.
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