Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 575

PS-21

Steering Gearbox

POWER ASSISTED SYSTEM (POWER STEERING)

23) After adjusting toe-in and steering angle, tight-

en the lock nut on tie-rod end.
Tightening torque:

85 N·m (8.7 kgf-m, 62.7 ft-lb)

NOTE:

When adjusting toe-in, hold the boot as shown to

prevent it from being rotated or twisted. If it be-

comes twisted, straighten it.

C: DISASSEMBLY

1. RACK HOUSING ASSEMBLY

1) Disconnect the four pipes from gearbox.
NOTE:

Remove the pipes C and D, which are fixed to

clamp plate, as a unit.

2) Secure the gearbox removed from vehicle in a

vise using ST.
CAUTION:

Secure the gearbox assembly in a vise using ST

as shown. Do not affix the gearbox to the vice

without this ST.

ST1 926200000

STAND

ST2 34199AG000 BOSS D

3) Remove the tie-rod end and lock nut from gear-

box.

4) Remove the small clip from the boot using pliers,

and then move the boot to tie-rod end side.

5) Using a flat tip screwdriver, remove the band

from boot.
NOTE:

Replace the boot if there is damage, cracks or de-

terioration.

6) Using the ST, loosen the lock nut.

ST 926230000

SPANNER

(1) Clamp

PS-00051

(1)

ST1

ST2

PS-00492

(1) Clip

(1) Band

(1) Lock nut

PS-00053

PS-00509

(1)

ST

(1)

PS-00494

PS-22

Steering Gearbox

POWER ASSISTED SYSTEM (POWER STEERING)

7) Tighten the adjusting screw until it can no longer

be tightened.

8) Remove the tie-rod.

9) Loosen the adjusting screw, and remove the

spring and sleeve.

10) Remove the two bolts securing valve assem-

bly.

11) Carefully draw out the input shaft and remove

the valve assembly.

12) Using a drill, release the crimping of holder.
CAUTION:

Make a hole of 2 mm (0.08 in) depth using a drill

with 3 mm (0.12 in) diameter.

13) Remove the holder.

14) Attach the ST on the valve side of rack, and

press out the outer side oil seal and rack while tak-

ing care that the rack and the steering body inner

surface do not come into contact with each other.

ST 34199XA030 INSTALLER & REMOVER
NOTE:

Block the pipe connection of steering body to pre-

vent fluid from flowing out.

(1) Adjusting screw

(1)

PS-00495

PS-00116

PS-00117

(1) Rack piston
(2) Outer side oil seal

PS-00516

PS-00064

PS-23

Steering Gearbox

POWER ASSISTED SYSTEM (POWER STEERING)

15) Insert the ST from pinion housing side and re-

move the oil seal and back-up ring using a press.

ST 34099PA010 OIL SEAL REMOVER

16) Using a press, remove the bushing of gearbox

installation portion.

2. CONTROL VALVE

1) Disconnect the four pipes from gearbox.

2) Secure the gearbox removed from vehicle in a

vise using ST.
CAUTION:

Secure the gearbox assembly in a vise using ST

as shown. Do not affix the gearbox to the vice

without this ST.

ST1 926200000

STAND

ST2 34199AG000 BOSS D

3) Using the ST, loosen the lock nut.

ST 926230000

SPANNER

4) Loosen the adjusting screw, and remove the

spring and sleeve.

5) Remove the two bolts securing valve assembly.

(1) Press
(2) Oil seal

PS-00138

(2)

(1)

ST

PS-00517

(1) Clamp

(1) Lock nut

(1)

ST1

ST2

PS-00492

ST

(1)

PS-00494

PS-00116

PS-24

Steering Gearbox

POWER ASSISTED SYSTEM (POWER STEERING)

6) Carefully draw out the input shaft and remove

the valve assembly.

7) Put a vinyl tape around the spline portion, and

slide the dust cover to remove.

8) Using a press, remove the pinion & valve as-

sembly from valve housing.

9) Using the ST and a press, remove the bushing

and oil seal from the valve housing.
CAUTION:

• Do not apply a force to the end surface of

valve housing.

• Do not reuse the oil seal after removal.

ST 34199AG090 INSTALLER & REMOVER

10) Using a snap ring pliers, remove the snap ring,

valve, oil seal and back-up washer.
CAUTION:

Be careful not to scratch the pinion and valve

assembly.

(1) Dust cover

(1) Pinion & valve ASSY
(2) Valve housing
(3) Cloth

PS-00143

PS-00144

(1)

(2)

(3)

(1)

PS-00149

(1) Oil seal
(2) Bushing

(1) Snap ring
(2) Valve
(3) Oil seal
(4) Back-up ring

(2)

(1)

ST

PS-00855

PS-00518

(1)

(2)

(3)

(4)