Lexus RX300 (MCU15). Service manual - part 516

R08702

Calipers

SR–26

–

STEERING

POWER STEERING VANE PUMP

LEXUS RX300   (RM785E)

4.

INSPECT SPRING

Using a vernier calipers, measure the free length of the spring.

Minimum free length: 32.3 mm (1.272 in.)

If it is not within the specification, replace the spring.

SR1CD–01

R11290

Vinyl Tape

W03541

Press

SST

Oil Seal

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STEERING

POWER STEERING VANE PUMP

SR–27

LEXUS RX300   (RM785E)

REPLACEMENT

NOTICE:
When using a vise, do not overtighten it.
IF NECESSARY, REPLACE OIL SEAL
(a)

Using a screwdriver with vinyl tape wound around its tip,
remove the oil seal.

NOTICE:
Be careful not to damage the front housing.

(b)

Coat a new oil seal lip with power steering fluid.

(c)

Using SST, press in the oil seal.
SST

09950–60010 (09951–00330),
09950–70010 (09951–07100)

NOTICE:
Make sure that the oil seal is installed facing in the correct
direction.

SR062–04

R13458

Inscribed Mark

F04644

Round End

Gasket

R11292

SR–28

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STEERING

POWER STEERING VANE PUMP

LEXUS RX300   (RM785E)

REASSEMBLY

NOTICE:
When using a vise, do not overtighten it.
1.

COAT PARTS INDICATED BY ARROWS WITH POWER
STEERING FLUID (See page SR–20)

2.

INSTALL 2 STRAIGHT PINS

Using a plastic hammer, tap in 2 new straight pins.
NOTICE:
Be careful not to damage the straight pins.
3.

INSTALL VANE PUMP SHAFT

4.

INSTALL CAM RING

Align the holes of the cam ring and 2 straight pins, and install
the cam ring with the inscribed mark facing outward.
5.

INSTALL VANE PUMP ROTOR

(a)

Install the vane pump rotor with the inscribed mark facing
outward.

(b)

Install a new snap ring to the vane pump shaft.

6.

INSTALL 10 VANE PLATES

Install the 10 vane plates with the round end facing outward.
7.

INSTALL GASKET

Install a new gasket facing the correct direction, as shown in the
illustration.
8.

INSTALL SIDE PLATE

Align the holes of the side plate and 2 straight pins, and install
the side plate.

9.

INSTALL WAVE WASHER

Install the wave washer so that its protrusions fit into the slots
in the side plate.
10.

INSTALL REAR HOUSING

(a)

Coat 2 new O–rings with power steering fluid and install
them to the rear housing.

(b)

Install the rear housing with the 4 bolts.
Torque: 24 N·m (240 kgf·cm, 17 ft·lbf)

R11986

SST

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STEERING

POWER STEERING VANE PUMP

SR–29

LEXUS RX300   (RM785E)

11.

INSTALL SPRING, FLOW CONTROL VALVE AND
PRESSURE PORT UNION

(a)

Install the spring.

(b)

Install the flow control valve facing the correct direction 
(See page SR–20).

(c)

Coat a new O–ring with power steering fluid and install it
to the pressure port union.

(d)

Install the pressure port union.
Torque: 83 N·m (850 kgf·cm, 62 ft·lbf)

12.

INSTALL SUCTION PORT UNION

(a)

Coat a new O–ring with power steering fluid and install it
to the suction port union.

(b)

Install the suction port union with the bolt.
Torque: 13 N·m (130 kgf·cm, 9 ft·lbf)

13.

INSTALL FRONT AND REAR BRACKETS

Install the front and rear brackets with the 3 bolts.

Torque: 43 N·m (440 kgf·cm, 32 ft·lbf)

14.

INSTALL VANE PUMP PULLEY

(a)

Install the vane pump pulley and nut to the vane pump
shaft.

(b)

Using SST, stop the pulley rotating and torque the nut.
SST

09960–10010 (09962–01000, 09963–01000)

Torque: 43 N·m (440 kgf·cm, 32 ft·lbf)

15.

MEASURE PS VANE PUMP ROTATING TORQUE
(See page SR–23)