Infiniti QX56 (Z62). Manual - part 774

COOLER PIPE AND HOSE

HA-37

< REMOVAL AND INSTALLATION >

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Cap on wrap the joint of the A/C piping and expansion 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 Installation

INFOID:0000000006276177

CAUTION:

Perform lubricant return operation before each refrigeration system disassembly. However, if a large
amount of refrigerant or lubricant is detected, never perform lubricant return operation. Refer to 

HA-

22, "Perform Lubricant Return Operation"

.

REMOVAL

1.

Use a refrigerant collecting equipment (for HFC-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 suitable 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"

.

HA-38

< REMOVAL AND INSTALLATION >

CONDENSER

CONDENSER

Exploded View

INFOID:0000000006276178

CONDENSER

CONDENSER : Removal and Installation

INFOID:0000000006276179

CAUTION:

Perform lubricant return operation before each refrigeration system disassembly. However, if a large
amount of refrigerant or lubricant is detected, never perform lubricant return operation. Refer to 

HA-

22, "Perform Lubricant Return Operation"

.

REMOVAL

1.

Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant. Refer to 

HA-20, "Recy-

cle Refrigerant"

.

2.

Remove the radiator core support upper. Refer to 

DLK-220, "Removal and Installation"

.

3.

Remove steering oil cooler. Refer to 

ST-54, "Exploded View"

.

4.

Remove A/T fluid cooler. Refer to 

TM-202, "Removal and Installation"

.

5.

Remove mounting bolt, and then disconnect high-pressure flexible hose from condenser.

CAUTION:

Cap or wrap the joint of the A/C piping and condenser with suitable material such as vinyl tape to
avoid the entry of air.

6.

Remove mounting bolt, and then disconnect high-pressure pipe from condenser.

CAUTION:

Cap or wrap the joint of the A/C piping and condenser with suitable material such as vinyl tape to
avoid the entry of air.

7.

Remove mounting bolts, and then remove condenser from the vehicle.

CAUTION:

Be careful not to damage core surface of condenser.

INSTALLATION

Note the following items, and install in the reverse order of removal.

1.

Outlet pipe assembly

2.

Refrigerant pressure sensor

3.

O-ring

4.

Pipe cover

5.

Liquid tank pipe 1

6.

Liquid tank pipe 2

7.

Liquid tank bracket

8.

Liquid tank

9.

Inlet pipe assembly

10. Condenser

Refer to 

GI-4, "Components"

 for symbols in the figure.

JMIIA0627GB

CONDENSER

HA-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 before 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 Installation

INFOID:0000000006276180

CAUTION:

Perform lubricant return operation before each refrigeration system disassembly. However, if a large
amount of refrigerant or lubricant is detected, never perform lubricant return operation. Refer to 

HA-

22, "Perform Lubricant Return Operation"

.

REMOVAL

1.

Use a refrigerant collecting equipment (for HFC-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 installed at protrusion of condenser. (Check that liquid

tank bracket never move to a position below center of liquid tank.)

• Replace O-rings of the A/C piping with new ones. Then apply compressor oil to them when installing.
• Perform lubricant adjusting procedure before 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 Installation

INFOID:0000000006276181

CAUTION:

Perform lubricant return operation before each refrigeration system disassembly. However, if a large
amount of refrigerant or lubricant is detected, never perform lubricant return operation. Refer to 

HA-

22, "Perform Lubricant Return Operation"

.

REMOVAL

1.

Use a refrigerant collecting equipment (for HFC-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.

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 them when installing.
• Check for leakages when recharging refrigerant. Refer to 

HA-18, "Leak Test"

.