Lexus SC300 / Lexus SC400. Manual - part 745

2. 

INSTALL PUMP ASSEMBLY
Torque the bolts and nut on the pump assembly in the order
shown.

Torque:

Bolt 39 N

⋅

m (400 kgf

⋅

cm, 29 ft

⋅

lbf)

Nut 43 N

⋅

m (440 kgf

⋅

cm, 32 ft

⋅

lbf)

3. 

CONNECT PRESSURE TUBE
Make sure the stopper is touching the pump housing, as
shown, then torque the union bolt.

Torque: 49 N

⋅

m (500 kgf

⋅

cm, 36 ft

⋅

lbf)

4. 

BLEED POWER STEERING SYSTEM
(See page 

SR–115

)

–

STEERING

POWER STEERING

SR–119

COMPONENTS

SR0G5–03

SECTIONAL VIEW

SR0G6–01

SR–120

–

STEERING

POWER STEERING

POWER STEERING PUMP
DISASSEMBLY

SR0G7–02

1. 

MOUNT POWER STEERING PUMP IN VISE

NOTICE: Do not tighten the vise too tight.

2. 

REMOVE PUMP PULLEY

(a)  Using SST, remove the pulley set nut.

SST 09278–54012

(b)  Remove the pulley.

3. 

REMOVE SUCTION PORT UNION

(a)  Remove the 2 bolts and union.
(b)  Remove the O–ring from the union.

4.  REMOVE PRESSURE PORT UNION, FLOW CONTROL

VALVE AND SPRING

(a)  Remove the pressure port union.
(b)  Remove the O–ring from the union.
(c)  Remove the flow control valve and spring.

5. 

REMOVE SPRING SEAT

(a)  Using snap ring pliers, remove the snap ring.

HINT: The snap ring is easier to remove if the spring seat is
pressed down slightly.

(b)  Temporarily install a bolt to the seat and pull out it.

HINT: Use a bolt with diameter 6 mm (0.24 in.) and pitch 1.0
mm (0.039 in.).

(c)  Remove the O–ring from the seat.

–

STEERING

POWER STEERING

SR–121

6. 

REMOVE VANE PUMP SHAFT WITH BEARING

(a)  Using snap ring pliers, remove the snap ring.

(b)  Temporarily install the appropriate plate washer and pulley

nut to the pump shaft.

(c)  Using SST, pull out the pump shaft.

SST 09910–00015 (09911–00011, 09912–00010)

7. 

REMOVE REAR BRACKET

(a)  Remove the 4 bolts and rear bracket.
(b)  Remove the O–ring from the bracket.

8. REMOVE 

WAVE 

WASHER

9. REMOVE 

SIDE 

FRONT PLATE, CAM RING, ROTOR, VANE

PLATES AND SIDE REAR PLATE

(a)  Using an extension bar and press, remove the side front

plate, cam ring, rotor, vane plates and side rear plate as an
assembly.
HINT: Catch the assembly in your hand to prevent it dropping.

SR–122

–

STEERING

POWER STEERING