2011 INFINITI QX56 Factory Service Manual

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Page 3089 of 5598

INFINITI QX56 2011 Factory Service Manual
COOLER PIPE AND HOSEHA-33
< REMOVAL AND INSTALLATION >
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COOLER PIPE AND HOSE
Exploded ViewINFOID:0000000006276172
FRONT
JMIIA0623GB
1. A/C unit assembly 2. O-ring 3. Hi

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INFINITI QX56 2011 Factory Service Manual
HA-34
< REMOVAL AND INSTALLATION >
COOLER PIPE AND HOSE
REAR
HIGH-PRESSURE FLEXIBLE HOSE
HIGH-PRESSURE FLEXIBLE HOSE : Removal and InstallationINFOID:0000000006276173
CAUTION:
Perform lubricant retur

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INFINITI QX56 2011 Factory Service Manual
COOLER PIPE AND HOSEHA-35
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Check for leakages when recharging refrigerant. Refer to HA-18, "Leak Test".
LOW-PRESSURE FLEXIBLE HOSE
LOW-P

COOLER PIPE AND HOSEHA-35
< REMOVAL AND INSTALLATION >
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Check for leakages when recharging refrigerant. Refer to HA-18, "Leak Test".
LOW-PRESSURE FLEXIBLE HOSE
LOW-PRESSURE FLEXIBLE HOSE : Removal and InstallationINFOID:0000000006276174
CAUTION:
Perform lubricant return operation before each refrigeration system disassembly. However, if a large
amount of refrigerant or lubricant is detected, n ever perform lubricant return operation. Refer to HA-
22, "Perform Lubricant Return Operation".
REMOVAL
1. Use a refrigerant collecting equipment (for HF C-B4a) to discharge the refrigerant. Refer to HA-22, "Per-
form Lubricant Return Operation".
2. Remove air cleaner. Refer to EM-27, "
Removal and Installation".
3. Remove the mounting bolt installed in low-pressure flexible hose from the vehicle.
4. Remove mounting bolts, and then remove low-pressure flexible hose from the vehicle. CAUTION:
Cap or wrap the joint of the A/C piping and comp ressor with suitable material such as vinyl tape to
avoid the entry of air.
INSTALLATION
Note the following items, and install in the reverse order of removal.
CAUTION:
Replace O-rings with new ones. Then apply compressor oil to them when installing.
Check for leakages when recharging refrigerant. Refer to HA-18, "
Leak Test".
HIGH-PRESSURE PIPE
HIGH-PRESSURE PIPE : Removal and InstallationINFOID:0000000006276175
CAUTION:
Perform lubricant return operati on before each refrigeration system disassembly. However, if a large
amount of refrigerant or lubricant is detected, n ever perform lubricant return operation. Refer to HA-
22, "Perform Lubricant Return Operation".
REMOVAL
1. Use a refrigerant collecting equipment (for HF C-134a) to discharge the refrigerant. Refer to HA-22, "Per-
form Lubricant Return Operation".
2. Remove low-pressure pipe. Refer to HA-36, "
LOW-PRESSURE PIPE : Removal and Installation".
3. Remove battery. Refer to PG-164, "
Removal and Installation".
4. Remove mounting bolts, and then remove battery bracket.
5. Disconnect harness connector, harness clip and ground harness for securing work space.
6. Remove mounting bolt, and then disconnec t high-pressure pipe from condenser.
CAUTION:
Cap or wrap the joint of the A/C piping and comp ressor with suitable material such as vinyl tape to
avoid the entry of air.
7. Remove high-pressure pipe mounting nut.
8. Remove high-pressure pipe from vehicle clips (A).
: Vehicle front
JMIIA0682ZZ
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
HA-36
< REMOVAL AND INSTALLATION >
COOLER PIPE AND HOSE
9. Partly remove rear half of front fender protector RH. Refer to EXT-23, "FENDER PROTECTOR : Exploded
View".
10. Remove high-pressure pipe.
IN

Page 3093 of 5598

INFINITI QX56 2011 Factory Service Manual
COOLER PIPE AND HOSEHA-37
< REMOVAL AND INSTALLATION >
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Cap on wrap the joint of the A/C piping and expan sion valve with suitable material such as vinyl
tape to avoid

COOLER PIPE AND HOSEHA-37
< REMOVAL AND INSTALLATION >
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Cap on wrap the joint of the A/C piping and expan sion valve with suitable material such as vinyl
tape to avoid the entry of air.
10. Remove low-pressure pipe from the vhiecle.
INSTALLATION
Note the following items, and install in the reverse order of removal.
CAUTION:
Replace O-rings with new ones. Then apply compressor oil to them when installing.
Check for leakages when recharging refrigerant. Refer to HA-18, "
Leak Test".
REAR COOLER PIPE
REAR COOLER PIPE : Removal and InstallationINFOID:0000000006276177
CAUTION:
Perform lubricant return operati on before each refrigeration system disassembly. However, if a large
amount of refrigerant or lubricant is detected, n ever perform lubricant return operation. Refer to HA-
22, "Perform Lubricant Return Operation".
REMOVAL
1. Use a refrigerant collecting equipment (for HF C-134a) to discharge the refrigerant. Refer to HA-22, "Per-
form Lubricant Return Operation".
2. Separate frame and body. Refer to DLK-251, "
Removal and Installation".
3. Remove mounting bolts, and then disconnect high-pressure pipe and low-pressure pipe from rear cooler & heater pipe assembly.
CAUTION:
Cap or wrap the joint of the A/C piping with suitab le material such as vinyl tape to avoid the entry
air.
4. Remove clamps, and then disconnect rear heater bypas hoses from rear cooler & heater pipe assembly.
5. Remove mounting bolt, and then disconnect rear cooler &. heater pipe assembly from rear expansion
valve.
CAUTION:
Cap or wrap the joint of the A/C piping and rear expansion valve with suitable material such as
vinyl tape to avoid the entry air.
6. Remove clamps, and then disconnect rear cooler & heater pipe assembly from rear heater pipes.
7. Remove mounting nuts, and then remove rear cooler pipe cover.
8. Remove mounting bolts and nuts, and then remove rear cooler & heater pipe assembly from the vehicle.
INSTALLATION
Note the following items, and install in the reverse order of removal.
CAUTION:
Replace O-rings with new ones. Then apply compressor oil to them when installing.
Check for leakages when recharging refrigerant. Refer to HA-18, "
Leak Test".
Revision: 2010 May2011 QX56

Page 3094 of 5598

INFINITI QX56 2011 Factory Service Manual
HA-38
< REMOVAL AND INSTALLATION >
CONDENSER
CONDENSER
Exploded ViewINFOID:0000000006276178
CONDENSER
CONDENSER : Removal and InstallationINFOID:0000000006276179
CAUTION:
Perform lubricant return ope

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INFINITI QX56 2011 Factory Service Manual
CONDENSERHA-39
< REMOVAL AND INSTALLATION >
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CAUTION:
Replace O-rings with new ones. Then apply compressor oil to them when installing.
Perform lubricant adjusting

CONDENSERHA-39
< REMOVAL AND INSTALLATION >
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CAUTION:
Replace O-rings with new ones. Then apply compressor oil to them when installing.
Perform lubricant adjusting procedure befo re installing new condenser. Refer to HA-22, "
Lubricant
Adjusting Procedure for Components Replacement Except Compressor".
Check for leakages when recharging refrigerant. Refer to HA-18, "
Leak Test".
LIQUID TANK
LIQUID TANK : Removal and InstallationINFOID:0000000006276180
CAUTION:
Perform lubricant return operation before each refrigeration system disassembly. However, if a large
amount of refrigerant or lubricant is detected, n ever perform lubricant return operation. Refer to HA-
22, "Perform Lubricant Return Operation".
REMOVAL
1. Use a refrigerant collecting equipment (for HF C-134a) to discharge the refrigerant. Refer to HA-20, "Recy-
cle Refrigerant".
2. Remove front bumper fascia. Refer to EXT-13, "
Removal and Installation".
3. Clean liquid tank and its surrounding area, and then remove dust and rust from liquid tank. CAUTION:
Be sure to clean carefully.
4. Remove mounting bolts, and then remove liquid tank from the condenser. CAUTION:
Cap or wrap the joint of the A/C piping and liquid tank with suitable material such as vinyl tape to
avoid the entry of air.
INSTALLATION
Install liquid tank, and then install liquid tank bracket on condenser.
CAUTION:
Check that liquid tank bracket is securely installe d at protrusion of condenser. (Check that liquid
tank bracket never move to a positio n below center of liquid tank.)
Replace O-rings of the A/ C piping with new ones. Then apply comp ressor oil to them when installing.
Perform lubricant adjusting procedure befo re installing new liquid tank. Refer to HA-22, "
Lubricant
Adjusting Procedure for Components Replacement Except Compressor".
Check for leakages when recharging refrigerant. Refer to HA-18, "
Leak Test".
REFRIGERANT PRESSURE SENSOR
REFRIGERANT PRESSURE SENSOR : Removal and InstallationINFOID:0000000006276181
CAUTION:
Perform lubricant return operation before each refrigeration system disassembly. However, if a large
amount of refrigerant or lubricant is detected, n ever perform lubricant return operation. Refer to HA-
22, "Perform Lubricant Return Operation".
REMOVAL
1. Use a refrigerant collecting equipment (for HF C-134a) to discharge the refrigerant. Refer to HA-20, "Recy-
cle Refrigerant".
2. Remove front grille. Refer to EXT-19, "
Removal and Installation".
3. Clean refrigerant pressure sensor and its surrounding area, and then remove dust and rust from refriger- ant pressure sensor.
CAUTION:
Be sure to clean carefully.
4. Disconnect refrigerant pressure sensor connector.
5. Use a adjustable wrench or other tool to hold the refrigerant pressure sensor mounting block, and then
remove the refrigerant pressure sensor from the condenser.
CAUTION:
Be careful not to damage liquid tank.
Be careful not to damage core surface of condenser.
Cap or wrap the joint of the condenser and liquid tank with suitable material such as vinyl tape to
avoid the entry of air.
Revision: 2010 May2011 QX56

Page 3096 of 5598

INFINITI QX56 2011 Factory Service Manual
HA-40
< REMOVAL AND INSTALLATION >
CONDENSER
INSTALLATION
Note the following items, and install in the reverse order of removal.
CAUTION:
Replace O-ring with new one. Then apply compressor oil to t

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