Infiniti QX56 (Z62). Manual - part 773

COOLER PIPE AND HOSE

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< REMOVAL AND INSTALLATION >

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COOLER PIPE AND HOSE

Exploded View

INFOID:0000000006276172

FRONT

JMIIA0623GB

1.

A/C unit assembly

2.

O-ring

3.

High-pressure pipe

4.

Condenser

5.

High-pressure flexible hose

6.

Compressor

7.

Low-pressure flexible hose

8.

Low-pressure pipe

9.

Rear cooler and heater  pipe assem-
bly

A.

To rear A/C unit

:Clip

Refer to 

GI-4, "Components"

 for symbols in the figure.

HA-34

< REMOVAL AND INSTALLATION >

COOLER PIPE AND HOSE

REAR

HIGH-PRESSURE FLEXIBLE HOSE

HIGH-PRESSURE FLEXIBLE HOSE : Removal and Installation

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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 air cleaner. Refer to 

EM-27, "Removal and Installation"

.

3.

Remove mounting bolt, and then remove high-pressure flexible hose from the vehicle.

CAUTION:

Cap or wrap the joint of the A/C piping, condensor and compressor 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.

JMIIA0625GB

1.

Rear A/C unit assembly

2.

O-ring

3.

Clamp

4.

Rear cooler & heater pipe assembly

5.

Rear heater bypas hose

6.

Rear cooler pipe cover

7.

Heater hose

8.

Front water outlet tube

9.

Gromet

10. Clamp

11.

Cap

12. Front heater outlet hose

A.

To front cooler sycle

B.

To front heater core

C.

To cooling sycle

Refer to 

GI-4, "Components"

 for symbols in the figure.

COOLER PIPE AND HOSE

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< 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 Installation

INFOID:0000000006276174

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-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 compressor 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 Installation

INFOID:0000000006276175

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.

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 disconnect high-pressure pipe from condenser.

CAUTION:

Cap or wrap the joint of the A/C piping and compressor 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

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.

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"

.

LOW-PRESSURE PIPE

LOW-PRESSURE PIPE : Removal and Installation

INFOID:0000000006276176

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.

Drain engine coolant from cooling system. Refer to 

CO-8, "Draining"

.

3.

Remove engine cover. Refer to 

EM-25, "Removal and Installation"

.

4.

Remove mouting bolt (A) and fixing pawls, and then remove relay box (1).

5.

Remove mounting bolts (A), and then remove relay box
bracket(1).

6.

Remove front water outlet tube assembly mounting nut.

7.

Remove mounting nuts, and then disconnect mounting bracket from the vhiecle.

8.

Remove mounting bolt, and then disconnect low-pressure pipe from low-pressure flexible hose.

CAUTION:

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

9.

Remove mounting bolt, and then disconnect low-pressure pipe from expansion valve.

CAUTION:

: Pawl

JMIIA0798ZZ

JMIIA0799ZZ