torque LEXUS GS400 2000 Service Repair Manual

AC0WH±01
I03812
GS400:GS300:
I02359
I02358
Suction Hose
Liquid Tube
CondenserCompressor
Discharge Hose
10 (100, 7)
10 (100, 7)
10 (100, 7)
10 (100, 7)
10 (100, 7)
Liquid Tube
Suction Hose CondenserCompressor
Discharge Hose
Liquid Tube
N´m (kgf´cm, ft´lbf)
: Specified torque
10 (100, 7)
Suction Tube
10 (100, 7)
10 (100, 7)
Suction Tube AC±20
± AIR CONDITIONINGREFRIGERANT LINE
2705 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
COMPONENTS

AC0WI±01
± AIR CONDITIONINGREFRIGERANT LINE
AC±21
2706 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REPLACEMENT
1. DISCHARGE REFRIGERANT FROM REFRIGERATION SYSTEM
2. REPLACE FAULTY TUBE OR HOSE
NOTICE:
Cap the open fittings immediately to keep moisture or dirt out of the system.
3. TIGHTEN JOINT OF BOLT OR NUT TO SPECIFIED TORQUE
NOTICE:
Connections should not be torqued tighter than the specified torqued.
Part tightenedN´mkgf´cmft´lbf
Compressor x Discharge hose101007
Compressor x Suction hose101007
Condenser x Discharge hose101007
Condenser x Liquid tube101007
A/C unit x Liquid and Suction tubes101007
Expansion valve x Liquid and suction tube4.14236 in.´lbf
Evaporator x Liquid and suction tube4.14236 in.´lbf
Suction line (Block joint)101007
4. EVACUATE AIR FROM REFRIGERATION SYSTEM AND CHARGE SYSTEM WITH REFRIGERANT
Specified amount: 600 ± 50 g (21.16 ± 1.76 oz.)
5. INSPECT FOR LEAKAGE OF REFRIGERANT
Using a gas leak detector, check for leakage of refrigerant.
6. INSPECT AIR CONDITIONING OPERATION

AC0WJ±01
I02365
Instrument Panel
Reinforcement
No.2 Brace
No.1 Brace
Water Hose
Bracket
Blower Unit Liquid Tube
Suction Hose
10 (100, 7)
Defroster Nozzle
Heater to Register
Center Duct
Air Duct
Air Duct RH
Center Air Duct
Air Duct LH

O±Ring
A/C Unit
N´m (kgf´cm, ft´lbf) : Specified torque

Non±reusable part
AC±22
± AIR CONDITIONINGAIR CONDITIONING UNIT
2707 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
AIR CONDITIONING UNIT
COMPONENTS

I02366
Wire Harness

Packing

Packing
Tube Connector
Evaporator Temperature
Sensor
Bracket Plate
Wire Harness

O±Ring
O±Ring
Tube and Accessory
4.1 (42, 36)
4.1 (42, 36)
Expansion Valve

O±Ring
Evaporator
Plate
Insulator Air Mix Servomotor
(Driver Side)
Air Outlet Servomotor
Air Duct
Cover
Drain PipeDrain Hose Air Mix Servomotor
(Passenger Side)
Heater Radiator
Blower Motor
Control Relay
N´m (kgf´cm, in.´lbf) : Specified torque

Non±reusable part

Packing
Air Duct
± AIR CONDITIONINGAIR CONDITIONING UNIT
AC±23
2708 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)

AC0WK±01
I02360
I02361
AC±24
± AIR CONDITIONINGAIR CONDITIONING UNIT
2709 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. DISCHARGE REFRIGERANT FROM REFRIGERATION
SYSTEM
HINT:
At the time of installation, please refer to the following item.
Evacuate air from refrigeration system.
Charge system with refrigerant and inspect for leakage of refrig-
erant.
Specified amount: 600 ± 50 g (21.16 ± 1.76 oz.)
2. DRAIN ENGINE COOLANT FROM RADIATOR
HINT:
It is not necessary to drain out all coolant.
3. DISCONNECT LIQUID TUBE AND SUCTION HOSE
FROM A/C UNIT
Remove the bolt and slide the plate, then disconnect the both
tubes.
Torque: 10 N´m (100 kgf´cm, 7 ft´lbf)
NOTICE:
Cap the open fittings immediately to keep moisture or dirt
out of the system.
HINT:
At the time of installation, please refer to the following item.
Lubricate 2 new O±rings with compressor oil and install them
to the tubes.
4. DISCONNECT WATER HOSES FROM HEATER RA-
DIATOR PIPES
(a) Grips the claws of the hose clip and slide the hose clip
along the hose.
(b) Disconnect the water hose.

AC0WL±01
AC±26
± AIR CONDITIONINGAIR CONDITIONING UNIT
2711 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
DISASSEMBLY
1. REMOVE THESE PARTS:
(a) Wire harness
(b) Drain hose
2. REMOVE HEATER RADIATOR
(a) Remove the screw and clamp.
(b) Pull out the heater radiator.
3. REMOVE BLOWER MOTOR CONTROL RELAY
Remove the screw and blower motor control relay.
4. REMOVE AIR MIX SERVOMOTORS
Remove the 6 screws and both servomotors.
5. REMOVE AIR OUTLET SERVOMOTOR
Remove the 2 screws and servomotor.
6. REMOVE EXPANSION VALVE
(a) Pry out the packing.
HINT:
At the time of reassembly, please refer to the following item.
Do not reuse the packing.
(b) Using SST, remove the 2 bolts, then separate the expansion valve, tube connector and tube and ac-
cessory.
SST 07110±61050
Torque: 4.1N´m (42 kgf´cm, 36 in.´lbf)
HINT:
At the time of reassembly, please refer to the following item.
Lubricate 4 new O±rings with compressor oil and install them to the valve.
7. REMOVE EVAPORATOR TEMPERATURE SENSOR
(a) Disconnect the wire harness clamp.
(b) Using a screwdriver, pull out the sensor with bracket plate.
HINT:
Tape the screwdriver tip before use.
(c) Release the 2 claws and sensor from bracket plate.
8. REMOVE EVAPORATOR
(a) Using SST, remove the 2 bolts and tube and accessory.
SST 07110±61050
Torque: 4.1N´m (42 kgf´cm, 36 in.´lbf)
HINT:
At the time of reassembly, please refer to the following item.
Lubricate 2 new O±rings with compressor oil and install them to the tube.
(b) Remove the 4 screws and cover.
(c) Pull out the evaporator.
(d) Remove the plate from evaporator.
HINT:
At the time of reassembly, please refer to the following item.
If evaporator is replaced, add compressor oil to evaporator.
Add 40 cc (1.4fl.oz.)
Compressor oil: ND±OIL 8 or equivalent
9. REMOVE INSULATOR FROM HEATER CASE
10. REMOVE AIR DUCT
Remove the 4 screws and duct.

AC0WU±01
I02379
GS300:
PS Pump PS Pump Bracket
52 (530, 38)
Compressor Bracket
52 (530, 38)
58 (590, 43)
Drive Belt
52 (530, 38)
O±Ring
Discharge Hose
10 (100, 7)
Suction Hose
10 (100, 7)

O±Ring
26 (265, 19)
52 (530, 38)
52 (530, 38)
Engine Under Cover
GS400:
Drive Belt
10 (100, 7)
10 (100, 7)Discharge Hose
Suction Hose

O±Ring

O±Ring

O±Ring
10 (100, 7)
49 (500, 36)
29 (300, 22)
Stay
Engine Under Cover
Compressor
N´m (kgf´cm, ft´lbf): Specified torque

Non±reusable part
58 (590, 43)
Compressor
52 (530, 38)
AC±36
± AIR CONDITIONINGCOMPRESSOR AND MAGNETIC CLUTCH
2721 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
COMPONENTS

I05295
Stator
Rotor
Shim Pressure Plate

Snap RingCompressor

Snap Ring
13.2 (135, 9)
N´m (kgf´cm, ft´lbf): Specified torque

Non±reusable part
± AIR CONDITIONINGCOMPRESSOR AND MAGNETIC CLUTCH
AC±37
2722 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)

AC0WW±01
AC0943
SST
AC0944
SST
AC0945
SST
AC0946
Shim
Pressure
Plate
AC0947
SST AC±40
± AIR CONDITIONINGCOMPRESSOR AND MAGNETIC CLUTCH
2725 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
DISASSEMBLY
1. REMOVE PRESSURE PLATE
(a) Using SST and a socket wrench, remove the shaft bolt.
SST 07112±76060
Torque: 13.2 N´m (135 kgf´cm, 9 ft´lbf)
(b) Install SST on the pressure plate.
SST 07112±66040
(c) Using SST and socket wrench, remove the pressure
plate.
SST 07112±66040, 07112±76060
(d) Remove the shims from the pressure plate.
2. REMOVE ROTOR
(a) Using SST, remove the snap ring.
SST 07114±84020

AC0WY±01
AC±44
± AIR CONDITIONINGCOMPRESSOR AND MAGNETIC CLUTCH
2729 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
1. GS400:
INSTALL COMPRESSOR
(a) Install the compressor with the 2 bolts temporarily.
(b) Install the compressor stay with the bolt and nut temporarily.
(c) Tighten the nut and 3 bolts.
Torque:
Bolt: 49 N´m (500 kgf´cm, 36 ft´lbf)
Nut: 29 N´m (300 kgf´cm, 22 ft´lbf)
(d) Connect the connector.
2. GS300:
INSTALL COMPRESSOR
(a) Install the compressor with the stud bolt.
Torque: 52 N´m (530 kgf´cm, 38 ft´lbf)
(b) Install the 3 bolts and nut.
Torque:
Bolt: 52 N´m (530 kgf´cm, 38 ft´lbf)
Nut: 26 N´m (265 kgf´cm, 19 ft´lbf)
(c) Connect the connector.
(d) Install the compressor bracket with the 2 bolts.
Torque: 52 N´m (530 kgf´cm, 38 ft´lbf)
(e) Install the PS pump bracket with the 2 bolts.
Torque: 52 N´m (530 kgf´cm, 38 ft´lbf)
3. GS300:
INSTALL 2 PS PUMP SET BOLTS
Torque: 58 N´m (590 kgf´cm, 43 ft´lbf)
4. GS 300:
CONNECT DISCHARGE AND SUCTION HOSES
Connect the both hoses with the 2 nut.
Torque: 10 N´m (100 kgf´cm, 7 ft´lbf)
NOTICE:
Hose should be connected immediately after the caps have been removed.
HINT:
Lubricate 2 new O±rings with compressor oil and install them to the hoses.
5. GS400:
CONNECT DISCHARGE HOSE
Connect the discharge hose with the nut.
Torque: 10 N´m (100 kgf´cm, 7 ft´lbf)
NOTICE:
Hose should be connected immediately after the cap have been removed.
HINT:
Lubricate a new O±ring with compressor oil and install them to the hose.