1996 TOYOTA LAND CRUISER charge

I01389
Condition: Insufficient cooling
I01449
Condition: Does not cool (Cools from time to time in some cases)
−
AIR CONDITIONING AIR CONDITIONING SYSTEM
AC−7
1996 LAND CRUISER (RM451U)
(4) Poor circulation of refrigerant
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy
 Pressure low in both low and
high pressure sides
 Frost on tube from condenser to
unit
Refrigerant flow obstructed by dirt
in condensercondenser cloggedReplace condenser
(5) Refrigerant does not circulate
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy
 Vacuum indicated on low pres-
sure side, very low pressure indi-
cated on high pressure side
 Frost or dew seen on piping be-
fore and after condenser/ drier or
expansion valve Refrigerant flow obstructed by
moisture or dirt in refrigeration sys-
tem
 Refrigerant flow obstructed by
gas leakage from expansion valve
Refrigerant does not circulate
(1) Check expansion valve
(2) Clean out dirt in expansion
valve by blowing with air
(3) Replace condenser
(4) Evacuate air and charge new
refrigerant to proper amount
(5) For gas leakage from expan-
sion valve, replace expansion
valve
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I01390
Condition: Insufficient cooling
I01392
Condition: Insufficient coolingNOTE : These gauge indica-
tions are shown when the
refrigeration system has
been opened and the refrig-
erant charged without vacu-
um purging.
AC−8
−
AIR CONDITIONING AIR CONDITIONING SYSTEM
1996 LAND CRUISER (RM451U)
(6) Refrigerant overcharged or insufficient cooling of
condenser
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy
 Pressure too high on both low
and high pressure sides
 No air bubbles seen through the
sight glass even when the engine
rpm is lowered Unable to develop sufficient per-
formance due to excessive refrig-
eration system
 Insufficient cooling of condenser Excessive refrigerant in
cycle → refrigerant over charged
 Condenser cooling → condenser
fins clogged or cooling fan faulty
(1) Clean condenser
(2) Check cooling fan with fluid
coupling operation
(3) If (1) and (2) are in normal
state, check amount of refrigerant
Charge proper amount of refriger-
ant
(7) Air present in refrigeration system
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy
 Pressure too high on both low
and high pressure sides
 The low pressure piping hot to
touch
 Bubbles seen in sight glass
Air entered in refrigeration system
 Air present in refrigeration sys-
tem
 Insufficient vacuum purging
(1) Check compressor oil to see if
it is dirty or insuf ficient
(2) Evacuate air and charge new
refrigerant
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AC2QF−01
N13790
Low Pressure
Service ValveHigh Pressure
Service Valve
N13792
Gas Leak Detector
AC−12
−
AIR CONDITIONING AIR CONDITIONING SYSTEM
1996 LAND CRUISER (RM451U)
CHARGING
1. INSTALL CHARGING CYLINDER
HINT:
When handling the charging cylinder, always follow the direc-
tion given in the instruction manual.
(a) Charge the proper amount of refrigerant in charging cylin-
der.
(b) Connect the center hose to the charging cylinder.
CAUTION:
Do not open both high and low hand valves of manifold
gauge set.
(c) Open the valve of charging cylinder.
(d) Press the valve core on the side of manifold gauge and expel the air inside of the center hose.
2. INSPECT REFRIGERATION SYSTEM FOR LEAKS
(a) Open the high pressure hand valve and charge refriger- ant.
(b) When the low pressure gauge indicates 98 kPa (1 kgf/cm
2, 14 psi), close the high pressure hand valve.
(c) Using leak detector, check the system for leakage.
(d) If leak is found, repair the faulty component or connection. Add evacuate air from refrigeration system (Refer to 4).
CAUTION:
Use the refrigerant recovery/ recycling machine to recover
the refrigerant whenever replacing parts.
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−
AIR CONDITIONING AIR CONDITIONING SYSTEM
AC−13
1996 LAND CRUISER (RM451U)
3. CHARGE REFRIGERANT INTO REFRIGERANT SYS-
TEM
If there is no leak after refrigerant leak check charge, the proper
amount of refrigerant into refrigeration system.
CAUTION:
Never run the engine when charging the system through
the high pressure side.Do not open the low pressure hand
valve when the system is being charged with liquid refrig-
erant.
(a) Open the high pressure hand valve fully.
(b) Charge specified amount of refrigerant, then close the high pressure hand valve.
HINT:
A fully charged system is indicated by the sight glass being free
of any bubbles.
4. REMOVE MANIFOLD GAUGE SET
(a) Close both hand valves of manifold gauge set.
(b) Disconnect the quick disconnect adapters from the ser- vice valves.
5. INSTALL CAPS TO SERVICE VALVES ON REFRIGER-
ANT LINES
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AC2QL−01
Z17947
Liquid TubePressure Switch
Suction Tube
Discharge Hose CondenserReceiver
Suction Hose
10 (100, 7)
N·m (kgf·cm, ft·lbf) : Specified torque
 Non− reusable part
5.4 (55, 48 in.·lbf)
10 (100, 7)
14 (140, 10)
10 (100, 7)
10 (100, 7)10 (100, 7)
−
AIR CONDITIONING REFRIGERANT LINE
AC−21
1996 LAND CRUISER (RM451U)
LOCATION
N14066
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AC2QN−01
AC−22
−
AIR CONDITIONING REFRIGERANT LINE
1996 LAND CRUISER (RM451U)
REPLACEMENT
1. DISCHARGE REFRIGERANT IN REFRIGERATION SYSTEM
2. REPLACE FAULTY TUBE OR HOSE
NOTICE:
Cap the open fittings immediately to keep moisture or dirt out of the sy\
stem.
3. TORQUE CONNECTIONS TO SPECIFIED TORQUE
NOTICE:
Connections should not be torqued tighter than the specified torque.
Part tightenedN·mkgf·cmft·lbf
Compressor x Discharge hose101007
Compressor x Suction hose101007
Condenser x Discharge hose101007
Condenser x Liquid tube101007
Reciever x Liquid tube5.45548 in.·lbf
Pressure switch x Liquid tube101007
Cooling unit x Liquid tube101007
Expansion valve x Evaporator5.45548 in.·lbf
Cooling unit x Suction tube101007
Liquid tube (Piping joint)1414010
Suction line (Block joint)101007
4. EVACUATE AIR IN REFRIGERATION SYSTEM AND CHARGE WITH REFRIGERANT
Specified amount: 850 ± 50 g (29.98 ± 1.76 oz.)
5. 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.
6. INSPECT AIR CONDITIONING OPERATION
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AC2QO−03
N06172
N14293
AC−24
−
AIR CONDITIONING COOLING UNIT
1996 LAND CRUISER (RM451U)
REMOVAL
1. DISCHARGE REFRIGERANT FROM REFRIGERA TION
SYSTEM
HINT:
At the time of installation, refer to the following procedure.
Evacuate air from refrigeration system.
Charge system with refrigerant and inspect for leakage of
refrigerant.
Specified amount:
850 ± 50 g (29.98 ± 1.76 oz.)
2. DISCONNECT SUCTION TUBE AND LIQUID TUBE
FROM COOLING UNIT FITTING
Remove the 2 bolts and 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 indtallation, lubricate 2 new O −rings with com-
pressor oil and install the tubes.
3. REMOVE THESE PARTS:
(a) Glove compratment door (See page BO−76)
(b) Glove compratment door reinforcement (See page BO−76 )
4. REMOVE COOLING UNIT
(a) Disconnect the connectors.
(b) Remove the 4 screws, 2 nuts and cooling unit.
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AC2R6−01
Z17949
Pressure Plate Rotor
Shim
Startor
Snap Ring Compressor
13.2
(135, 9)
Z17948
Suction Hose
Discharge Hose
Drive Belt
Compressor Compressor Bracket
O−Ring O−Ring
37 (375, 27)
N·m (kgf·cm, ft·lbf) : Specified torque
 Non− reusable part
10 (100, 7)
25 (250, 18)
37 (375, 27)
10 (100, 7)
AC−34
−
AIR CONDITIONING COMPRESSOR AND MAGNETIC CLUTCH
1996 LAND CRUISER (RM451U)
COMPONENTS
N16453 N14067
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