Infiniti G37 Coupe. Manual - part 749

HA-42

< ON-VEHICLE REPAIR >

HIGH-PRESSURE FLEXIBLE HOSE

HIGH-PRESSURE FLEXIBLE HOSE

Exploded View

INFOID:0000000001713748

Refer to 

HA-13, "Refrigerant Connection"

.

Removal and Installation

INFOID:0000000001675640

REMOVAL

1.

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

2.

Remove engine cover. Refer to 

EM-28, "Exploded View"

.

3.

Remove air cleaner case (LH) and air duct (LH). Refer to 

EM-26, "Exploded View"

.

1.

Blower unit

2.

O-ring

3.

Low-pressure pipe 2

4.

Low-pressure flexible hose

5.

Compressor

6.

Radiator & condenser assembly

7.

High-pressure flexible hose

8.

High-pressure pipe 1

9.

Heater & cooling unit assembly

10. Expansion valve

11.

Evaporator

12. High-pressure pipe 2

13. Low-pressure pipe 1

Refer to 

GI-4, "Components"

 for symbols in the figure.

JSIIA0109GB

HIGH-PRESSURE FLEXIBLE HOSE

HA-43

< ON-VEHICLE REPAIR >

C

D

E

F

G

H

J

K

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M

A

B

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N

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P

4.

Remove mounting bolt (A) from high-pressure flexible hose
bracket (1).

5.

Disconnect one-touch joint between high-pressure flexible hose
(1) and condenser pipe assembly (2) with disconnector (A)
(SST: 9253089912).

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.

6.

Remove mounting nut (A) from high-pressure flexible hose (1),
and then remove high-pressure flexible hose.

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

Installation is basically the reverse order of removal.

CAUTION:

• Replace O-rings with new ones. Then apply compressor oil to them when installing.
• Female-side piping connection is thin and easy to deform. Slowly insert the male-side piping

straight in axial direction.

• Insert piping securely until a click is heard.
• After piping connection is completed, pull male-side piping by hand to make sure that connection

does not come loose.

• Check for leakages when recharging refrigerant.

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HA-44

< ON-VEHICLE REPAIR >

HIGH-PRESSURE PIPE 1(ENGINE COMPARTMENT)

HIGH-PRESSURE PIPE 1(ENGINE COMPARTMENT)

Exploded View

INFOID:0000000001713749

Refer to 

HA-13, "Refrigerant Connection"

.

Removal and Installation

INFOID:0000000001675642

REMOVAL

1.

Remove low-pressure flexible hose and pipe 2. Refer to 

HA-40, "Exploded View"

.

2.

Remove mounting bolt (A) from high-pressure flexible hose
bracket (1).

1.

Blower unit

2.

O-ring

3.

Low-pressure pipe 2

4.

Low-pressure flexible hose

5.

Compressor

6.

Radiator & condenser assembly

7.

High-pressure flexible hose

8.

High-pressure pipe 1

9.

Heater & cooling unit assembly

10. Expansion valve

11.

Evaporator

12. High-pressure pipe 2

13. Low-pressure pipe 1

Refer to 

GI-4, "Components"

 for symbols in the figure.

JSIIA0109GB

JSIIA0026ZZ

HIGH-PRESSURE PIPE 1(ENGINE COMPARTMENT)

HA-45

< ON-VEHICLE REPAIR >

C

D

E

F

G

H

J

K

L

M

A

B

HA

N

O

P

3.

Remove high-pressure pipe 1 (1) from vehicle clips (A).

4.

Disconnect one-touch joint between high-pressure pipe 1 (1)
and high-pressure pipe 2 (2) with disconnector (A) (SST:
9253089908).

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.

5.

Disconnect one-touch joint between high-pressure pipe 1 and
condenser pipe assembly with disconnector (A) (SST:
9253089908).

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.

6.

Remove vacuum hose. Refer to 

BR-37, "Exploded View"

.

7.

Remove high-pressure pipe 1.

INSTALLATION

Installation is basically the reverse order of removal.

CAUTION:

• Replace O-rings with new ones. Then apply compressor oil to them when installing.
• Female-side piping connection is thin and easy to deform. Slowly insert the male-side piping

straight in axial direction.

• Insert piping securely until a click is heard.
• After piping connection is completed, pull male-side piping by hand to make sure that connection

does not come loose.

• Check for leakages when recharging refrigerant.

JSIIA0028ZZ

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