Lexus SC300 / Lexus SC400. Manual - part 710

REPLACEMENT OF OIL SEAL

1. 

REMOVE OIL SEAL
(a)  Using snap ring pliers, remove the snap ring and plate

washer.

(b)  Using a screwdriver, pry out the oil seal.
NOTICE: Be careful not to damage the housing.

2. 

INSTALL OIL SEAL
(a) Using 

SST and a hammer, tap in a new oil seal to a depth

of 4.5–5.5 mm (0.177–0.217 in.) from the housing edge.

(b)  Using snap ring pliers, install the plate washer and snap

ring.

(c)  Apply fluid to the oil seal lip.

–

COOLIING SYSTEM

Electronically Controlled Hydraulic Cooling Fan
(Hydraulic Motor)

CO–53

ASSEMBLY OF HYDRAULIC MOTOR

(See Components on page 

CO–50

)

HINT:

•

Thoroughly clean all parts to be assembled.

•

Before installing the parts, apply new fluid to all sliding
and rotating surfaces.

1. MOUNT 

MOTOR 

HOUSING

Slightly mount the motor housing in a vise.
NOTICE: Be careful not to damage the motor housing.

2. 

INSTALL FRONT THRUST WASHER

3. 

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

4. 

INSTALL DRIVE SHAFT

5. 

INSTALL REAR THRUST WASHER

6. INSTALL 

MOTOR 

COVER

(a)  Install a new O–ring to the motor housing groove.

(b)  Install the motor cover with the four bolts.

Torque: 28 N

⋅

m (290 kgf

⋅

cm, 21 ft

⋅

lbf)

CO–54

–

COOLIING SYSTEM

Electronically Controlled Hydraulic Cooling Fan
(Hydraulic Motor)

7. 

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)

INSTALLATION OF HYDRAULIC MOTOR

(See Components on page 

CO–47

)

1. 

INSTALL HYDRAULIC MOTOR TO FAN SHROULD
Install the hydraulic motor with the three bolts.

Torque: 4.9 N

⋅

m (50 kgf

⋅

cm, 43 in.

⋅

lbf)

2. 

INSTALL COOLING FAN TO HYDRAULIC MOTOR
Install the fan with the plate washer bolt.
Tighten the nut by turning it counterclockwise.

Torque: 15 N

⋅

m (150 kgf

⋅

cm, 11 ft

⋅

lbf)

3. INSTALL 

RADIATOR 

FAN 

SHROULD

(a)  Place the fan shrould on the radiator.
(b) Slightly 

lift the fan shrould, and connect the two oil cooler

hoses (for cooling fan) to the hose clamp on the fan
shrould.

(c)  Install the fan shrould with the four bolts.

Torque: 4.9 N

⋅

m (50 kgf

⋅

cm, 43 in.

⋅

lbf)

–

COOLIING SYSTEM

Electronically Controlled Hydraulic Cooling Fan
(Hydraulic Motor)

CO–55

(d)  Install the wire clamp to the fan shrould.

4.  INSTALL COOLING FAN RESERVOIR TANK TO FAN

SHROULD
(a)  Install the reservoir tank with the four bolts.

Torque: 4.9 N

⋅

m (50 kgf

⋅

cm, 43 in.

⋅

lbf)

(b)  Install the suction hose to the clamp on the fan shrould.

5. 

INSTALL COOLING FAN INLET PIPE TO FAN SHROULD
Install the inlet pipe with the two bushings, brackets and
bolts.

Torque: 4.9 N

⋅

m (50 kgf

⋅

cm, 43 in.

⋅

lbf)

6. CONNECT 

HOSES

Connect the following hoses:

(1) Pressure 

hose 

to 

hydraulic 

motor 

Connect the

pressure hose with a new gasket and union bolt.

Torque: 64 N

⋅

m (650 kgf

⋅

cm, 47 ft

⋅

lbf)

(2)  Return hose to hydraulic motor.

(3)  Upper radiator hose to radiator.

CO–56

–

COOLIING SYSTEM

Electronically Controlled Hydraulic Cooling Fan
(Hydraulic Motor)