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.