2007 TOYOTA SIENNA Steering

PS–24POWER STEERING – RACK AND PINION POWER STEERING GEAR
PS
REMOVAL
NOTICE:
When installing, coat the parts indicated by the arrows
with power steering fluid or molybdenum disulfide
lithium base grease (See page PS-21).
1. INSPECT CENTER FRONT WHEEL
2. REMOVE FRONT WHEEL
3. SEPARATE TIE ROD ASSEMBLY LH
SST 09628-62011
4. SEPARATE TIE ROD ASSEMBLY RH
SST 09628-62011
HINT:
Perform the same procedure on the other side.
5. SEPARATE STEERING INTERMEDIATE SHAFT
ASSEMBLY
(a) Fix the steering wheel with the seat belt.
(b) Release the 3 springs and separate the dust cover.
(c) Place matchmarks on the intermediate shaft
assembly and power steering gear assembly.
(d) Remove the bolt and separate the intermediate
shaft assembly.
6. SEPARATE FRONT STABILIZER LINK ASSEMBLY LH
7. SEPARATE FRONT STABILIZER LINK ASSEMBLY
RH
HINT:
Perform the same procedure on the other side.
D030613
D030704E03
D029986E03

POWER STEERING – RACK AND PINION POWER STEERING GEARPS–25
PS
8. REMOVE FRONT STABILIZER BRACKET NO.1 LH
(a) Remove the 2 bolts and remove the stabilizer
bracket No. 1.
9. REMOVE FRONT STABILIZER BRACKET NO.1 RH
HINT:
Perform the same procedure on the other side.
10. DISCONNECT PRESSURE FEED TUBE ASSEMBLY
(a) Remove the clip and disconnect the return tube
assembly from the power steering gear assembly.
(b) Using SST, disconnect the pressure feed tube
assembly from the power steering gear assembly.
SST 09023-12701
(c) Remove the bolt and separate the tube clamp.
D030615E05
D029970
D029971E01
D029974

PS–26POWER STEERING – RACK AND PINION POWER STEERING GEAR
PS
(d) Remove the nut and separate the tube clamp.
11. REMOVE RACK & PINION POWER STEERING GEAR
ASSEMBLY
(a) Remove the 2 bolts, nuts and the power steering
gear assembly.
NOTICE:
Do not damage the 2 pressure tubes.
DISASSEMBLY
1. REMOVE RETURN TUBE NO.2
(a) Using SST, remove the return tube No. 2.
SST 09023-12701
2. REMOVE STEERING LEFT TURN PRESSURE TUBE
(a) Using SST, remove the left turn pressure tube.
SST 09023-38201
(b) Remove the 2 O-rings from the left turn pressure
tube.
3. REMOVE STEERING RIGHT TURN PRESSURE TUBE
SST 09023-38201
HINT:
Perform the same procedure on the other side.
4. FIX RACK & PINION POWER STEERING GEAR
ASSEMBLY
(a) Using SST, secure the power steering gear
assembly.
SST 09612-00012
HINT:
Tape the SST before use.
D029975
D029979
D030600E01
D029981E01
D030616E01

POWER STEERING – RACK AND PINION POWER STEERING GEARPS–27
PS
5. REMOVE TIE ROD ASSEMBLY LH
(a) Place matchmarks on the tie rod assembly and rack
end sub-assembly.
(b) Loosen the lock nut, and remove the tie rod
assembly and lock nut.
6. REMOVE TIE ROD ASSEMBLY RH
HINT:
Perform the same procedure on the other side.
7. REMOVE STEERING RACK BOOT CLIP
(a) Remove the 2 rack boot clips.
8. REMOVE STEERING RACK BOOT NO.2 CLAMP
(a) Using pliers, remove the rack boot No. 2 clamp.
NOTICE:
Be careful not to damage the steering rack boot
No. 2.
9. REMOVE STEERING RACK BOOT NO.1 CLAMP
HINT:
Perform the same procedure on the other side.
10. REMOVE STEERING RACK BOOT NO.2
11. REMOVE STEERING RACK BOOT NO.1
12. REMOVE STEERING RACK END SUB-ASSEMBLY
(a) Using a screwdriver and a hammer, unstake the
claw washer.
NOTICE:
Avoid any impact to the power steering rack.
F040050E11
C083166E06

PS–28POWER STEERING – RACK AND PINION POWER STEERING GEAR
PS
(b) Using 2 SST, remove the 2 steering rack end sub-
assembly and 2 claw washers.
SST 09922-10010
NOTICE:
• Use SST 09922-10010 in the direction shown
in the illustration.
• Securely hold the power steering rack end
with a SST.
13. REMOVE RACK GUIDE
(a) Using SST, remove the rack guide spring cap nut.
SST 09922-10010
NOTICE:
Use SST 09922-10010in the direction shown in
the illustration.
(b) Using SST, remove the rack guide spring cap.
SST 09631-10021
(c) Remove the compression spring and the rack guide.
14. REMOVE POWER STEERING CONTROL VALVE
(a) Using a socket wrench (27 mm), remove the rack
housing cap.
F041526E01
F041500E01
F041501E01
F041502E01

POWER STEERING – RACK AND PINION POWER STEERING GEARPS–29
PS
(b) Using SST, hold the control valve and remove the
nut.
SST 09616-00011
(c) Wind vinyl tape around the serrated part of the
control valve.
(d) Remove the dust cover from the control valve
housing.
(e) Remove the 2 bolts and the control valve w/ control
valve housing.
(f) Remove the gasket.
(g) To prevent oil seal lip damage, wind vinyl tape
around the serrated part of the control valve.
(h) Using a plastic hammer, remove the control valve w/
oil seal from the control valve housing.
(i) Remove the oil seal from the control valve.
(j) Using a screwdriver, remove the 4 control valve
rings.
NOTICE:
Be careful not to damage the grooves for the
control valve rings.
F041503E01
F041504E01
F045545
F041506E01
R011572E06

PS–30POWER STEERING – RACK AND PINION POWER STEERING GEAR
PS
15. REMOVE POWER STEERING CONTROL VALVE
UPPER OIL SEAL
(a) Using SST and a press, remove the control valve
upper bearing and control valve upper oil seal from
the control valve housing.
SST 09950-70010 (09951-07150), 09950-60010
(09951-00250)
16. REMOVE CYLINDER END STOPPER
(a) Using a screwdriver and a hammer, turn the cylinder
end stopper clockwise until the wire end is visible
through the service hole.
(b) Using a screwdriver and a hammer, turn the cylinder
end stopper counterclockwise, and remove the wire
and cylinder end stopper.
17. REMOVE POWER STEERING RACK
18. REMOVE POWER STEERING RACK BUSH
(a) Remove the rack bush from the power steering
rack.
(b) Using SST, remove the rack bush oil seal.
SST 09527-21011, 09612-24014 (09613-22011)
(c) Using a screwdriver, remove the O-ring from the
rack bush.
19. REMOVE POWER STEERING CYLINDER TUBE OIL
SEAL
(a) Using SST and a press, remove the cylinder tube oil
seal.
SST 09950-70010 (09951-07360), 09950-60010
(09951-00290)
F040911E07
C083179E06
F040542E06
F040544E06

POWER STEERING – RACK AND PINION POWER STEERING GEARPS–31
PS
20. REMOVE RACK STEERING PISTON RING
(a) Using a screwdriver, remove the rack steering
piston ring and O-ring.
NOTICE:
Be careful not to damage the grooves for rack
steering piston ring.
INSPECTION
1. INSPECT POWER STEERING RACK
(a) Using a dial indicator, check the power steering rack
for runout and for teeth wear and damage.
Maximum runout:
0.3 mm (0.012 in.)
If necessary, replace the rack & pinion power
steering gear assembly.
(b) Check the back surface for wear and damage.
If necessary, replace the rack & pinion power
steering gear assembly.
2. INSPECT TIE ROD ASSEMBLY LH
(a) Secure the tie rod assembly in a vise.
(b) Install the nut to the stud bolt.
(c) Flip the ball joint stud back and forth 5 times.
(d) Using a torque wrench, turn the nut continuously at
a rate of 3 to 5 seconds per turn and take the torque
reading on the 5th turn.
Torque: Turning torque
0.83 to 3.43 N*m (8.5 to 35.0 kgf*cm, 7.3
to 30.4 in.*lbf)
3. INSPECT TIE ROD ASSEMBLY RH
HINT:
Perform the same procedure on the other side.
REASSEMBLY
1. INSTALL RACK STEERING PISTON RING
(a) Coat a new O-ring with power steering fluid and
install it onto the power steering rack.
(b) Expand a new rack steering piston ring with your
fingers.
NOTICE:
Be careful not to over expand the rack steering
piston ring.
(c) Coat a new rack steering piston ring with power
steering fluid.
R010955
ZX09355
ZK08184
C003629