Lexus GS300/400 (2000 year). Manual — part 229

SR0DT–01

W01278

Vane Pump Shaft

Front Housing

Bushing

N00372

Height

Thickness

Length

R10282

Feeler Gauge

–

STEERING

POWER STEERING VANE PUMP (2JZ–GE)

SR–23

2193

INSPECTION

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

CHECK OIL CLEARANCE BETWEEN VANE PUMP
SHAFT AND BUSHING

Using a micrometer and caliper gauge, measure the oil clear-
ance.

Standard clearance:
0.03 – 0.05 mm (0.0012 – 0.0020 in.)
Maximum clearance: 0.07 mm (0.0028 in.)

If it is more than the maximum, replace the shaft and front hous-
ing.

2.

INSPECT VANE PUMP ROTOR AND VANE PLATES

(a)

Using a micrometer, measure the height, thickness and
length of the 10 plates.
Minimum height: 8.6 mm (0.339 in.)
Minimum thickness: 1.40 mm (0.0551 in.)
Minimum length: 14.99 mm (0.5902 in.)

(b)

Using a feeler gauge, measure the clearance between
the rotor groove and plate.
Maximum clearance: 0.033 mm (0.0013 in.)

R13897

Inscribed Mark

R07603

R07591

Compressed Air

R07600

Inscribed
Mark

SR–24

–

STEERING

POWER STEERING VANE PUMP (2JZ–GE)

2194

If it is more than the maximum, replace the plate and/or rotor
with one having the same mark stamped on the cam ring.

Inscribed mark: 1, 2, 3, 4 or None

HINT:
There are 5 vane plate lengths with the following rotor and cam
ring marks:

Rotor and cam

ring mark

Vane plate part

number

Vane plate length

mm (in.)

None

44345–26010

14.999–15.001

(0.59051–0.59059)

1

44345–26020

14.997–14.999

(0.59043–0.59051)

2

44345–26030

14.995–14.997

(0.59035–0.59043)

3

44345–26040

14.993–14.995

(0.59027–0.59035)

4

44345–26050

14.991–14.993

(0.59020–0.59027)

3.

INSPECT FLOW CONTROL VALVE

(a)

Coat the valve with power steering fluid and check that it
falls smoothly into the valve hole by its own weight.

(b)

Check the flow control valve for leakage.
Close one of the holes and apply compressed air
392–490 kPa (4–5 kgf/cm

2

, 57–71 psi) into the opposite

side, and confirm that air does not come out from the end
holes.

If necessary, replace the valve with one having the same letter
as inscribed on the front housing.

Inscribed mark: A, B, C, D, E or F

R08702

Calipers

W01743

SST

Oil Seal

Front Housing

F02574

Press

SST

Front Housing

Oil Seal

W01280

Press

Vinyl Tape

Vane Pump

Bearing

Shaft

REMOVE

INSTALL

–

STEERING

POWER STEERING VANE PUMP (2JZ–GE)

SR–25

2195

4.

INSPECT SPRING

Using calipers, measure the free length of the spring.

Minimum free length: 33.2 mm (1.307 in.)

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

5.

IF NECESSARY, REPLACE OIL SEAL

(a)

Using SST, tap out the oil seal from the front housing.
SST

09631–10030

NOTICE:
Be careful not to damage the bushing of 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.

6.

IF NECESSARY, REPLACE BEARING

(a)

Press out the bearing from the vane pump shaft.

(b)

Using snap ring expander, replace the snap ring with new
one.

NOTICE:
Be careful not to damage the shaft.
(c)

Coat a new bearing with power steering fluid.

(d)

Press in the bearing to the shaft.

SR0DU–01

W01281

Press

SST

Bearing

Oil Seal

Front Housing

Vinyl Tape

F02546

Inscribed Mark

R01149

Round End

SR–26

–

STEERING

POWER STEERING VANE PUMP (2JZ–GE)

2196

REASSEMBLY

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

COAT WITH POWER STEERING FLUID
(See page

SR–19

)

2.

INSTALL VANE PUMP SHAFT WITH BEARING

(a)

Wind vinyl tape on the serrated part of the vane pump
shaft.

(b)

Using SST, press in the shaft with the bearing.
SST

09608–04031

NOTICE:
Be careful not to damage the oil seal.
(c)

Using snap ring pliers, install a new snap ring to the front
housing.

3.

INSTALL STRAIGHT PINS

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

4.

INSTALL CAM RING

Install the ring with the inscribed mark facing outward.
HINT:
Align the holes of the cam ring with the straight pins.
5.

INSTALL VANE PUMP ROTOR

Install the rotor with the inscribed mark facing outward.

6.

INSTALL VANE PLATES AND GASKET

(a)

Install the 10 plates with the round end facing outward.

(b)

Install a new gasket on the front housing.

NOTICE:
Be careful the direction of the gasket.
7.

INSTALL SIDE PLATE

Align the holes of the plate and 2 straight pins.