1991 LEXUS SC400 Service Repair Manual

Page 1289 of 4087

LEXUS SC400 1991  Service Repair Manual 
REMOVAL OF HYDRAULIC PUMP
(See Components on page CO±26)
1. REMOVE BATTERY CAUTION: Work must be started after approx. 20 se-
conds or longer from the time the ignition switch is
turned to  the ºLO

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LEXUS SC400 1991  Service Repair Manual 
(b)  Remove the two bolts and ignition coil.
7.  REMOVE INTAKE AIR CONNECTOR (a)  Disconnect the following hoses:(1) Air hose from ISC valve
(2) Air hose (from PS air control valve) from intake air
c

Page 1291 of 4087

LEXUS SC400 1991  Service Repair Manual 
10.  REMOVE LH ENGINE WIRE COVERRemove 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.

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LEXUS SC400 1991  Service Repair Manual 
15.  REMOVE RH NO.2 TIMING BELT COVER(a)  Disconnect  the cam position sensor connector from theignition coil bracket.
(b) Disconnect  the  cam position sensor wire from the clamp
on the timing belt

Page 1293 of 4087

LEXUS SC400 1991  Service Repair Manual 
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 u

Page 1294 of 4087

LEXUS SC400 1991  Service Repair Manual 
3.  MOUNT REAR HOUSINGHINT: 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)  Rem

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LEXUS SC400 1991  Service Repair Manual 
(b)  Using a plastic±faced hammer, carefully tap out the front
housing.
(c)  Remove the O±ring from the casing.
7.  REMOVE FRONT THRUST WASHER AND DRIVE SHAFT
8.  REMOVE DRIVE AND DRIVEN ROTORS
9.

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LEXUS SC400 1991  Service Repair Manual 
12.  REMOVE SPOOL VALVE(a)  Using a 10 mm hexagon wrench, remove the end plugand following parts:
(1) Spool valve
(2) Compression spring
(3) Spool sleeve
(b)  Remove the O±ring from the end plug.
IN