Lexus SC300 / Lexus SC400. Manual - part 704

10.  REMOVE LH ENGINE WIRE COVER

Remove the two bolts and engine wire cover.

11.  REMOVE VSV FOR EVAP SYSTEM

Remove the two bolts, and disconnect the VSV from cylinder
head and timing belt cover.

12.  REMOVE RH NO.3 TIMING BELT COVER

Remove the three bolts and timing belt cover.

13.  REMOVE LH NO.3 TIMING BELT COVER

(a)  Remove the four mounting bolts.
(b) Disconnect 

the cord grommet from the timing belt cover,

and remove the timing belt cover.

(c)  Remove the cord grommet from the high–tension cord.

14.  DISCONNECT RADIATOR HOSE FROM WATER INLET

15.  REMOVE DRIVE BELT IDLER PULLEY

Remove the pulley bolt, cover plate and idler pulley.

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COOLIING SYSTEM

Electronically Controlled Hydraulic
Cooling Fan (Hydraulic Pump)

CO–29

15.  REMOVE RH NO.2 TIMING BELT COVER

(a)  Disconnect the cam position sensor connector from the

ignition coil bracket.

(b) Disconnect 

the 

cam position sensor wire from the clamp

on the timing belt cover.

(c)  Remove the five mounting bolts.
(d)  Disconnect the wire clamp from the timing belt cover,

and remove the timing belt cover and four gasket.

16.  REMOVE LH NO.2 TIMING BELT COVER

(a) Disconnect 

the 

cam position sensor wire from the clamp

on the timing belt cover.

(b)  Disconnect the cam position sensor connector.
(c)  Remove the three mounting bolts.
(d)  Disconnect the connector grommet from the timing belt

cover, and remove the timing belt cover and two
gaskets.

17.  DISCONNECT PRESSURE AND SUCTION HOSES FROM

HYDRAULIC PUMP

18.  REMOVE HYDRAULIC PUMP

(a)  Disconnect the solenoid valve connector.
(b)  Remove the two mounting bolts and two nuts.
(c)  Disconnect the engine speed sensor wire clamp.
(d)  Remove the hydraulic pump.

CO–30

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COOLIING SYSTEM

Electronically Controlled Hydraulic
Cooling Fan (Hydraulic Pump)

COMPONENTS FOR DISASSEMBLY AND
ASSEMBLY

DISASSEMBLY OF HYDRAULIC PUMP

1. 

REMOVE SUCTION PORT UNION
(a)  Remove the mounting bolt.
(b)  Pull out the port union.
(c)  Remove the O–ring from the port union.

2. 

REMOVE WIRE CLAMP
(a)  Disconnect the wire clamp from the rear housing.
(b)  Remove the wire clamp from the read wire.

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COOLIING SYSTEM

Electronically Controlled Hydraulic
Cooling Fan (Hydraulic Pump)

CO–31

3. 

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

4. 

REMOVE SOLENOID VALVE
(a)  Remove the solenoid valve.
(b)  Remove the O–ring from the solenoid valve.
(c)  Remove the O–ring from the rear housing.

5. 

REMOVE PUMP PULLEY
(a) Using 

SST, 

remove the pulley nut by turning it clockwise.

SST 09278–54012

(b)  Using SST, remove the pulley.
SST 09286–46011

6. 

REMOVE FRONT HOUSING
(a)  Remove the five mounting bolts.

CO–32

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COOLIING SYSTEM

Electronically Controlled Hydraulic
Cooling Fan (Hydraulic Pump)