Lexus SC300 / Lexus SC400. Manual — part 41
INSTALLATION OF EVAPORATOR
1. INSTALL
REMOVAL
PARTS
Install the removal parts in reverse order of removal proce-
dure.
HINT:
•
The tightening torque for the bolt used to install the
expansion valve on the evaporator is shown below.
Specified torque: 5.4 N
⋅
m (55 kgf
⋅
cm, 48 ft
⋅
lbf)
•
The tightening torque for the bolts used to install the
liquid tube and suction tube to the cooling is shown
below.
Specified torque: 10 N
⋅
m (100 kgf
⋅
cm, 7 ft
⋅
lbf)
•
The tightening torque specified for the bolt used to
install the equalizer tube to EPR is shown below.
Specified torque: 25 N
⋅
m (250 kgf
⋅
cm, 18 ft
⋅
lbf)
2.
IF EVAPORATOR WAS REPLACED, ADD COMPRESSOR
OIL TO EVAPORATOR
Add 40–50 cc (1.4–1.7 fl.oz)
Compressor oil: ND OIL 6,
SUNISO NO. 5 GS or equivalent
3. EVACUATE
AIR
IN
REFRIGERATION
SYSTEM
AND
CHARGE WITH REFRIGERANT
Specified amount: 950
±
50 g (33.44
±
1.76 oz)
4.
INSPECT FOR LEAKAGE OF REFRIGERANT
Using a gas leak tester, check for leakage of refrigerant.
AC–124
–
AIR CONDITIONING SYSTEM
Evaporator
HEATER RADIATOR
REMOVAL OF HEATER RADIATOR
1.
SET TEMPERATURE CONTROL SWITCH TO MAX COOL
2.
REMOVE A/C UNIT
See page
3. REMOVE
HATER
RADIATOR
(a) Remove the two screws and the plate.
(b) Remove the two screws and the clamps.
(c) Pull the radiator out.
INSPECTION OF HEATER RADIATOR
INSPECT FINS FOR BLOCKAGE
If the fins are clogged, clean them with compressed air.
INSTALLATION OF HEATER RADIATOR
1.
INSTALL HEATER RADIATOR TO A/C UNIT
(a) Put the radiator in the A/C until.
(b) Install the clamps with two screws.
(c) Install the plate with two screws.
2.
INSTALL A/C UNIT
See page
–
AIR CONDITIONING SYSTEM
Heater Radiator
AC–125
EXPANSION VALVE
ON–VEHICLE INSPECTION
1. CHECK QUANTITY OF GAS DURING REFRIGERATION
CYCLE
2.
INSTALL MANIFOLD GAUGE SET
3. RUN
ENGINE
Run the engine at 2,000 rpm for at least 5 minutes. Then
check that the high pressure reading is 1,275–1,471 kPa
(13–15 kgf/cm, 185–213 psi).
4. CHECK
EXPANSION
VALVE
If the expansion valve is faulty, the low pressure reading will
drop to 0 kPa (0 kgf/cm, 0 psi), otherwise it is OK.
HINT: When the low pressure drops to 0 kPa (0 kgf/cm, 0 psi),
feel the receiver’s IN and OUT sides for no temperature differ-
ence.
REMOVAL OF EXPANSION VALVE
1. REMOVE
EVAPORATOR
.
2.
REMOVE EQUALIZER TUBES
3. REMOVE
EXPANSION
VALVE
INSTALLATION OF EXPANSION VALVE
1. INSTALL
EXPANSION
VALVE
Specified torque:
0.31 inch tube 13 N
⋅
m (135 kgf
⋅
cm, 10 ft
⋅
lbf)
0.50 inch tube 22 N
⋅
m (225 kgf
⋅
cm, 16 ft
⋅
lbf)
2.
INSTALL EQUALIZER TUBES
3. INSTALL
EVAPORATOR
AC–126
–
AIR CONDITIONING SYSTEM
Expansion Valve
WATER VALVE
REMOVAL OF WATER VALVE
1. DISCONNECT
FOLLOWING
PARTS
FROM
WATER
VALVE
•
Water hose
•
acuum hose
•
Connector
2. REMOVE
WATER
VALVE
(a) Remove the two bolts.
(b) Loosen the hose band, then pull off the water hose.
INSPECTION OF WATER VALVE VSV
See page
–
AIR CONDITIONING SYSTEM
Water Valve
AC–127
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