Nissan Quest E52. Manual - part 711

COOLER PIPE AND HOSE

HA-35

< REMOVAL AND INSTALLATION >

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REAR

HIGH-PRESSURE FLEXIBLE HOSE

HIGH-PRESSURE FLEXIBLE HOSE : Removal and Installation

INFOID:0000000009651581

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 mounting bolt, and then disconnect high-pressure flexible hose from compressor. Refer to 

HA-

31, "COMPRESSOR : Removal and Installation"

.

CAUTION:

• Plug high-pressure port of compressor to prevent compressor oil leakage.
• Cap of wrap the joint of the A/C piping and compressor with suitable material such as vinyl tape

to avoid the entry of air.

JMIIA1870GB

1.

Rear A/C unit assembly

2.

O-ring

3.

Rear cooler pipe assembly 2

4.

Rear cooler pipe assembly 1

5.

Front cooler pipe assembly

6.

Heater hose

7.

Heater hose

8.

Clamp

A.

To front cooler cycle

B.

To front heater cycle

:Clip

: Always replace after every disassembly.

: N·m (kg-m, in-lb)

HA-36

< REMOVAL AND INSTALLATION >

COOLER PIPE AND HOSE

3.

Remove mounting bolt (A), and then disconnect high-pressure
pipe (1) and high-pressure flexible hose (2) from condenser pipe
assembly.

CAUTION:

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

4.

Remove high-pressure flexible hose from the vehicle.

INSTALLATION

Note the following items, and then 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 FLEXIBLE HOSE

LOW-PRESSURE FLEXIBLE HOSE : Removal and Installation

INFOID:0000000009651582

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-20, "Recy-

cle Refrigerant"

.

2.

Remove mounting bolt, and then disconnect low-pressure flexible hose from compressor. Refer to 

HA-31,

"COMPRESSOR : Removal and Installation"

.

CAUTION:

• Plug low-pressure port of compressor to prevent compressor oil leakage.
• Cap of wrap the joint of the A/C piping and compressor with suitable material such as vinyl tape

to avoid the entry of air.

3.

Remove mounting bolt (A), and then disconnect low-pressure
flexible hose (1) and high-pressure pipe (2) from front cooler
pipe assembly (3).

CAUTION:

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

4.

Remove low-pressure flexible hose from the vehicle.

INSTALLATION

Note the following items, and then 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:0000000009651583

CAUTION:

: Vehicle front

JMIIA1191ZZ

: Vehicle front

JMIIA1190ZZ

COOLER PIPE AND HOSE

HA-37

< REMOVAL AND INSTALLATION >

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P

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 mounting bolt (A), and then disconnect low-pressure
flexible hose (1) and high-pressure pipe (2) from front cooler
pipe assembly (3).

CAUTION:

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

3.

Remove mounting bolt (A), and then disconnect high-pressure
pipe (1) and high-pressure flexible hose (2) from condenser pipe
assembly.

CAUTION:

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

4.

Remove fixing clips, and then remove high-pressure pipe from the vehicle.

INSTALLATION

Note the following items, and then 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"

.

COOLER PIPE ASSEMBLY

COOLER PIPE ASSEMBLY : Removal and Installation

INFOID:0000000009651584

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.

Drain engine coolant from cooling system. Refer to 

CO-8, "Draining"

.

3.

Remove cowl top extension. Refer to 

EXT-22, "Removal and Installation"

.

4.

Remove intake manifold collector. Refer to 

EM-29, "Removal and Installation"

.

: Vehicle front

JMIIA1190ZZ

: Vehicle front

JMIIA1191ZZ

HA-38

< REMOVAL AND INSTALLATION >

COOLER PIPE AND HOSE

5.

Remove fixing clamps (A), and then disconnect heater hoses
from heater & cooling unit assembly.

6.

Remove fixing clamps (A), and then disconnect heater hoses
from rear heater tube. (inlet and outlet)

7.

Remove mounting bolt (A), and then disconnect low-pressure
flexible hose (1) and high-pressure pipe (2) from front cooler
pipe assembly (3).

CAUTION:

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

8.

Remove mounting bolt (A), and then disconnect front cooler
pipe assembly (2) from expansion valve (1).

CAUTION:

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

9.

Remove front cooler pipe assembly mounting bolt and nut from engine room. Refer to 

HA-34, "Exploded

View"

.

JMIIA1815ZZ

JMIIA1816ZZ

: Vehicle front

JMIIA1190ZZ

JMIIA1819ZZ