LEXUS GS400 2000 Service Service Manual

N20013
R±Shape
RotorSnap Ring
Compressor
AC1743
AC1744
AC0950
SST
N20012
R±Shape
Snap Ring
CompressorStator
± AIR CONDITIONINGCOMPRESSOR AND MAGNETIC CLUTCH
AC±41
2726 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
NOTICE:
At the time of reassembly, please refer to the following
item.
The snap ring should be installed so that beveled side
faces up.
(b) Using a plastic hammer, tap the rotor off the shaft.
NOTICE:
Be careful not to damage the pulley when tapping on the ro-
tor.
3. REMOVE STATOR
(a) Disconnect the stator lead wire from the compressor
housing.
(b) Using SST, remove the snap ring.
SST 07114±84020
NOTICE:
At the time of reassembly, please refer to the following
item.
The snap ring should be installed so that its beveled side
faces up.

AC0951
Stator AC±42
± AIR CONDITIONINGCOMPRESSOR AND MAGNETIC CLUTCH
2727 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(c) Remove the stator.

AC0WX±01
N04963
Dial Indicator
± AIR CONDITIONINGCOMPRESSOR AND MAGNETIC CLUTCH
AC±43
2728 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REASSEMBLY
Reassembly is in the reverse order of disassembly
(See page AC±40).
AFTER REASSEMBLY, CHECK MAGNETIC CLUTCH
CLEARANCE
(a) Set the dial indicator to the pressure plate of the magnetic
clutch.
(b) Connect the magnetic clutch lead wire to the positive (+)
terminal of the battery.
(c) Check the clearance between the pressure plate and ro-
tor when connecting the negative (±) terminal to the bat-
tery.
Standard clearance:
0.5 ± 0.15 mm (0.020 ± 0.0059 in.)
If the clearance is not within the standard clearance, adjust the
clearance using shims to obtain the standard clearance.
Shim thickness:
0.1 mm (0.004 in.)
0.3 mm (0.012 in.)
0.5 mm (0.020in.)

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.

± AIR CONDITIONINGCOMPRESSOR AND MAGNETIC CLUTCH
AC±45
2730 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
6. GS400:
INSTALL SUCTION HOSE
Install the suction hose with the bolt and 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 hose.
7. INSTALL DRIVE BELT
(See page AC±16)
8. INSPECT DRIVE BELT TENSION
(See page AC±14)
9. INSTALL ENGINE UNDER COVER
10. CONNECT NEGATIVE (±) TERMINAL CABLE TO BATTER
11. EVACUATE AIR FROM REFRIGERATION SYSTEM AND CHARGE SYSTEM WITH REFRIGERANT
Specified amount: 600 ± 50 g (21.16 ± 1.76 oz.)
12. INSPECT FOR LEAKAGE OF REFRIGERANT
Using a gas leak detector, check for leakage of refrigerant.
If there is leakage, check the tightening torque at the joints.
13. INSPECT A/C OPERATION

AC0WZ±01
AC±46
± AIR CONDITIONINGCONDENSER
2731 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
CONDENSER
ON±VEHICLE INSPECTION
1. INSPECT CONDENSER FINS FOR BLOCKAGE OR DAMAGE

If the fins are clogged, wash them with water and dry with compressed air.
NOTICE:
Be careful not to damage the fins.

If the fins are bent, straighten them with a screwdriver or pliers.
2. INSPECT CONDENSER AND FITTINGS FOR LEAKAGE OF REFRIGERANT
Using a gas leak detector, check for leakage of refrigerant.
If there is leakage, check the tightening torque at the joints.

AC22B±01
I09253
I09252I10327

O±Ring Liquid TubeDischarge Hose
N´m (kgf´cm, ft´lbf) : Specified torque

Non±reusable partAir Cleaner Assembly
Air Cleaner Duct Condenser
Bracket
Condenser
Dryer
Filter
Cap
O±Ring
10 (100, 7)
10 (100, 7)
12.3 (125, 9)
Compressor oil ND±OIL 8 or equivalent
Radiator Upper Support
± AIR CONDITIONINGCONDENSER
AC±47
2732 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
COMPONENTS

AC0X0±01
I02397
I02398
I02399
AC±48
± AIR CONDITIONINGCONDENSER
2733 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. REMOVE THESE PARTS:
(a) Air cleaner duct
(b) Air cleaner assembly
(c) 2 radiator upper supports
3. DISCONNECT DISCHARGE HOSE AND LIQUID TUBE
Remove the 2 bolts and disconnect the hose and tube.
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 hose and tube.
4. REMOVE CONDENSER
(a) Remove the 4 bolts and 2 brackets.
(b) Push the radiator toward engine.
(c) Push the condenser toward radiator and pull it upward.
HINT:
At the time of installation, please refer to the following item.
If condenser is replaced, add compressor oil to the condenser.
Add 40 cc (1.4 fl. oz)
Compressor oil: ND ± OIL 8 or equivalent

AC22C±01
I10090
10 mm (0.39 in.)
Hexagon
Wrench
Modulator
I10092
I10093
2 Layered
Part
I10091
Protrusion
I10094
± AIR CONDITIONINGCONDENSER
AC±49
2734 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REPLACEMENT
REPLACE DRYER FROM MODULATOR
(a) Using a hexagon wrench (10 mm, 0.39 in.), remove the
cap from the modulator.
(b) Remove the filter from the modulator.
(c) Using pliers, remove the dryer.
(d) Insert a new dryer into the modulator.
NOTICE:

Do not remove the dryer from a vinyl bag until insert-
ing it into the modulator.

Install the dryer with its 2 layered part faced upward
to the modulator.
(e) Insert the filter into the modulator.
NOTICE:
Install the filter with its protrusion faced downward to the
modulator.
(f) Install the cap to the modulator.
(1) Apply compressor oil to the o±rings and screw part
of the cap.
Compressor oil: ND±OIL 8 or equivalent
(2) Using a hexagon wrench (10 mm, 0.39 in.), install
the caps.
Torque: 12.3 N´m (125 kgf´cm, 9 ft´lbf)

AC0X1±01
AC±50
± AIR CONDITIONINGCONDENSER
2735 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
Installation is in the reverse order of removal (See page AC±48).