Lexus SC300 / Lexus SC400. Manual - part 326

3. 

REMOUNT REAR HOUSING
HINT: Mount the parts in a vise as shown in the illustration.

4. INSTALL 

CASING

HINT: If rubber from the O–rings adheres to the O–ring instal-
lation location, replace the casing.
(a)  Install a new O–ring to the rear housing groove.

(b)  Align the pin hole of the casing with the straight pin on

the rear housing, and install the casing.

5. 

INSTALL REAR THRUST WASHER

6. 

INSTALL DRIVEN AND DRIVE ROTORS
Install the drive and driven rotors with the dot mark facing up-
ward.

7. 

INSTALL DRIVE SHAFT

8. 

INSTALL FRONT THRUST WASHER

–

COOLIING SYSTEM

Electronically Controlled Hydraulic
Cooling Fan (Hydraulic Pump)

CO–39

9. 

INSTALL FRONT HOUSING
(a)  Install a new O–ring to the casing groove.

(b)  Align the pin holes of the front housing with the straight

pin.

(c)  Apply a light coat of fluid on the threads and under the

heads of the mounting bolts.

(d)  Install the front housing with the five bolts.

Torque: 21 N

⋅

m (210 kgf

⋅

cm, 15 ft

⋅

lbf)

10.  INSTALL DRIVE SHAFT PRELOAD

(a)  Check that the drive shaft rotates smoothly without

abnormal noise.

(b)  Temporarily install the pulley nut, and check the rotating

torque.

Rotating torque:

0.3 N

⋅

m (3.0 kgf

⋅

cm, 2.6 in.

⋅

lbf)

11. INSTALL 

PUMP 

PULLEY

(a)  Slide the pulley onto the drive shaft.
(b)  Measure the clearance between the pulley end and

drive shaft end.

Standard: 1.3–1.7 mm (0.051–0.067 in.)

Minimum: 1.0 mm (0.039 in.)

If the clearance is less than minimum, replace the pulley.

CO–40

–

COOLIING SYSTEM

Electronically Controlled Hydraulic
Cooling Fan (Hydraulic Pump)

(c)  Using SST, install the pulley with the nut. Tighten the nut

by turning it counterclockwise.

SST 09278–54012

Torque: 59 N

⋅

m (600 kgf

⋅

cm, 43 ft

⋅

lbf)

12.  INSTALL SOLENOID VALVE

(a)  Install a new O–ring to the solenoid valve.
(b)  Install a new O–ring to the rear housing groove.
(c)  Apply fluid to the two O–rings.

(d)  Install the solenoid valve.

Torque: 39 N

⋅

m (400 kgf

⋅

cm, 28 ft

⋅

lbf)

13.  INSTALL WIRE CLAMP

(a)  Install the wire clamp to the read wire.
(b)  Install the wire clamp to the rear housing.

14.  INSTALL SUCTION PORT UNION

(a)  Install the O–ring to the port union.
(b)  Apply fluid to the O–ring.
(c)  Install the port union with the bolt.

Torque: 13 N

⋅

m (135 kgf

⋅

cm, 10 ft

⋅

lbf)

–

COOLIING SYSTEM

Electronically Controlled Hydraulic Cooling Fan
(Hydraulic Pump)

CO–41

INSTALLATION OF HYDRAULIC PUMP

(See Components on page 

CO–26

)

1. 

INSTALL HYDRAULIC PUMP
(a)  Install the hydraulic pump, solenoid valve connector

clamp and engine speed sensor wire clamp with the two
bolts and two nuts.

Torque:

12 mm head 16 N

⋅

m (160 kgf

⋅

cm, 12 ft

⋅

lbf)

14 mm head 20 N

⋅

m (310 kgf

⋅

cm, 22 ft

⋅

lbf)

HINT: Each bolt length is indicated in the illustration.
Bolt length:

A 106 mm (4.17 in.) for 12 mm head
B 114 mm (4.49 in.) for 14 mm head

(b)  Connect the solenoid valve connector.

2.  CONNECT PRESSURE AND SUCTION HOSES TO

HYDRAULIC PUMP
(a)  Connect the pressure hose with new gasket and union

bolt.

Torque: 64 N

⋅

m (650 kgf

⋅

cm, 47 ft

⋅

lbf)

(b)  Connect suction hose.

3. 

INSTALL RH NO.2 TIMING BELT COVER
(a)  Install the four gaskets to the timing belt cover.
(b)  Install the connector grommet to the timing belt cover.
(c)  Install the timing belt cover with the five bolts.

Torque: 16 N

⋅

m (160 kgf

⋅

cm, 12 ft

⋅

lbf)

HINT (12 mm head bolt): Use bolts 106 mm (4.17 in.) in
length.

(d)  Install the wire clamp to the timing belt cover.
(e) Install 

the 

cam position sensor wire to the wire clamp on

the timing belt cover.

(f) 

Install the cam position sensor connector to the ignition
coil bracket.

4. 

INSTALL LH NO.2 TIMING BELT COVER
(a)  Install the two gaskets to the timing belt cover.
(b)  Run the cam position sensor wire through the timing belt

cover hole.

(c)  Install the timing belt cover and connector bracket with

the three bolts.

(d)  Connect the cam position sensor connector.
(e)  Install the cam position sensor connector to the

connector bracket.

(f) Install 

the 

cam position sensor wire to the wire clamp on

the timing belt cover.

(g)  Install the connector grommet to the timing belt cover.

CO–42

–

COOLIING SYSTEM

Electronically Controlled Hydraulic Cooling Fan
(Hydraulic Pump)