Lexus ES300 (1997 year). Service manual — part 554

R08702

Calipers

R11290

Vinyl Tape

W03541

Press

SST

Oil Seal

SR–24

–

STEERING

POWER STEERING VANE PUMP

1320

1997 LEXUS ES300 (RM511U)

4.

INSPECT SPRING

Using a 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.

5.

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 to install the oil seal facing the correct direction.

SR062–01

R13458

Inscribed Mark

R01149

Round End

R11292

–

STEERING

POWER STEERING VANE PUMP

SR–25

1321

1997 LEXUS ES300 (RM511U)

REASSEMBLY

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

COAT WITH POWER STEERING FLUID
(See page

SR–18

)

2.

INSTALL VANE PUMP SHAFT

3.

INSTALL STRAIGHT PINS

Using a plastic hammer, tap in 2 new pins.
NOTICE:
Be careful not to damage the pins.
4.

INSTALL CAM RING

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

5.

INSTALL VANE PUMP ROTOR

(a)

Install the rotor with the inscribed mark facing outward.

(b)

Install a new snap ring to the vane pump shaft.

6.

INSTALL VANE PLATES

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

INSTALL GASKET

Install a new gasket.
8.

INSTALL SIDE PLATE

Align the holes of the plate and 2 straight pins.

9.

INSTALL WAVE WASHER

Install the 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 housing.

(b)

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

R11986

SST

SR–26

–

STEERING

POWER STEERING VANE PUMP

1322

1997 LEXUS ES300 (RM511U)

11.

INSTALL SPRING, FLOW CONTROL VALVE AND
PRESSURE PORT UNION

(a)

Install the valve facing the correct direction.
(See page

SR–18

)

(b)

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

(c)

Torque the 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 union.

(b)

Torque the bolt.
Torque: 13 N·m (130 kgf·cm, 9 ft·lbf)

13.

INSTALL FRONT AND REAR BRACKETS

Torque the 3 bolts and 2 nuts.

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

14.

INSTALL VANE PUMP PULLEY

Using SST to stop the pulley rotating, 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–21

)

SR063–01

W03441

Pressure
Feed
Tube

Stopper

R11355

A

B

Z19285

SST

Clamp

Engine Wire

Fulcrum
Length

–

STEERING

POWER STEERING VANE PUMP

SR–27

1323

1997 LEXUS ES300 (RM511U)

INSTALLATION

1.

INSTALL PRESSURE FEED TUBE

(a)

Torque the union bolt with a new gasket.

HINT:
Make sure the stopper of the tube is touching the front bracket,
as shown, then torque the union bolt.

Torque: 52 N·m (525 kgf·cm, 38 ft·lbf)

(b)

Install the oil pressure switch to the union bolt.
Torque: 21 N·m (210 kgf·cm, 15 ft·lbf)

2.

INSTALL PS VANE PUMP ASSEMBLY WITH PRESS-
ER FEED TUBE

Temporarily tighten the 2 (A and B) bolts.
3.

INSTALL DRIVE BELT

(a)

Adjust drive belt tension.
(See page

SR–3

)

(b)

Using SST, torque the A bolt.
SST

09249–63010

Torque: 29 N·m (293 kgf·cm, 21 ft·lbf)

HINT:

Use a torque wrench with a fulcrum length of 300 mm
(11.81 in.).

Disconnect the clamp with engine wire.

(c)

Torque the B bolt.
Torque: 43 N·m (440 kgf·cm, 32 ft·lbf)

(d)

Connect the connector to the oil pressure switch.

NOTICE:
Be careful for oil on the connector.