Lexus RX300 (MCU15). Service manual — part 521
W03098
Rack Guide
Spring Cap
SST
W03099
12
°
W03100
SST
W03101
SST
SST
Rack Guide
Spring Cap
SR–46
–
STEERING
POWER STEERING GEAR
LEXUS RX300 (RM785E)
15.
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)
Using SST, torque the rack guide spring cap.
SST
09631–10021
Torque: 25 N·m (250 kgf·cm, 18 ft·lbf)
(c)
Using SST, return the rack guide spring cap 12
°.
SST
09631–10021
(d)
Using SST, turn the control valve shaft right and left 1 or
2 times.
SST
09616–00011
(e)
Using SST, loosen the rack guide spring cap until the rack
guide spring is not functioning.
SST
09631–10021
(f)
Using SST and a torque wrench, tighten the rack guide
spring cap until the preload is within specification.
SST
09616–00011, 09631–10021
Preload (turning):
0.8 – 1.4 N·m (8 – 14 kgf·cm, 6.9 – 12.2 in.·lbf)
W03102
Rack Guide
Spring Cap
Lock Nut
Fulcrum
Length
SST
SST
R11667
Claw
F03861
Fulcrum Length
SST
–
STEERING
POWER STEERING GEAR
SR–47
LEXUS RX300 (RM785E)
16.
INSTALL RACK GUIDE SPRING CAP LOCK NUT
(a)
Apply sealant to 2 or 3 threads of the rack guide spring
cap lock nut.
Sealant:
Part No.08833–00080, THREE BOND 1344,
LOCTITE 242 or equivalent
(b)
Temporarily install the rack guide spring cap lock nut.
(c)
Using SST, hold the rack guide spring cap and using
another SST, torque the rack guide spring cap lock nut.
SST
09631–10021, 09922–10010
Torque: 50 N·m (510 kgf·cm, 37 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.).
(d)
Recheck the total preload.
Preload (turning):
0.8 – 1.4 N·m (8 – 14 kgf·cm, 6.9 – 12.2 in.·lbf)
(e)
Remove the RH and LH rack ends.
17.
INSTALL RH AND LH CLAW WASHERS AND RACK
ENDS
(a)
Install a new claw washer, and temporarily install the rack
ends.
HINT:
Align the claws of the claw washer with the steering rack
grooves.
(b)
Using a spanner (24 mm), hold the steering rack steadily
and using SST, torque the rack end.
SST
09922–10010
Torque: 60 N·m (610 kgf·cm, 44 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.).
R11668
Brass Bar
F05631
F05632
SST
2 mm
(0.79 in.)
or less
SR–48
–
STEERING
POWER STEERING GEAR
LEXUS RX300 (RM785E)
(c)
Using a brass bar and a hammer, stake the claw washer.
NOTICE:
Avoid any impact to the steering rack.
(d)
Employ the same manner described above to the other
side.
18.
INSTALL RH AND LH RACK BOOTS, CLAMPS AND
CLIPS
(a)
Ensure that the steering rack hole is not clogged with
grease.
HINT:
If the hole is clogged, the pressure inside the boot will change
after it is assembled and the steering wheel is turned.
(b)
Install the rack boot, clip and a new damp.
NOTICE:
Be careful not to damage or twist the boot.
(c)
Using SST, tighten the clamp as shown in the illustration.
SST
09521–24010
(d)
Employ the same manner described above to the other
side.
19.
INSTALL RH AND LH TIE ROD ENDS AND LOCK NUTS
(a)
Screw the lock nut and tie rod end onto the rack end until
the matchmarks are aligned.
(b)
After adjusting toe–in, torque the nut.
(See page SA–4)
Torque: 74 N·m (750 kgf·cm, 54 ft·lbf)
(c)
Employ the same manner described above to the other
side.
F12876
Fulcrum
Length
SST
–
STEERING
POWER STEERING GEAR
SR–49
LEXUS RX300 (RM785E)
20.
INSTALL 2 TURN PRESSURE TUBES
(a)
Coat 4 new O–rings with power steering fluid and install
them to the 2 turn pressure tubes.
(b)
Using SST, install the 2 turn pressure tubes.
SST
09023–38200
Torque: 12 N·m (120 kgf·cm, 9 ft·lbf)
HINT:
S
Use a torque wrench with a fulcrum length of 250 mm
(9.84 in.).
S
This torque value is effective in case that SST is parallel
to a torque wrench.
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