Infiniti M35/M45 Y50. Manual - part 151

REFRIGERANT LINES

ATC-155

C

D

E

F

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ATC

4.

Remove mounting nuts from low-pressure flexible hose and
high-pressure flexible hose.

CAUTION:

Cap or wrap the joint of low-pressure flexible hose and
high-pressure flexible hose with suitable material such as
vinyl tape to avoid the entry of air.

5.

Disconnect compressor (magnet clutch and ECV) connectors.

6.

Remove A/C compressor belt. Refer to 

EM-16, "DRIVE BELTS"

 .

7.

Remove mounting bolts from compressor, using power tools.

8.

Remove compressor downward of the vehicle.

VK45DE

1.

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

2.

Remove air cleaner case and air duct. Refer to 

EM-177, "AIR CLEANER AND AIR DUCT"

 .

3.

Remove engine undercover, using power tools.

4.

Remove mounting nut between low-pressure flexible hose and low-pressure pipe. Refer to 

ATC-157,

"Removal and Installation of Low-pressure Flexible Hose and Pipe"

 .

RJIA4155E

RJIA4158E

SJIA1791E

ATC-156

REFRIGERANT LINES

5.

Remove mounting nuts from low-pressure pipe and high-pres-
sure flexible hose.

CAUTION:

Cap or wrap the joint of low-pressure pipe and high-pres-
sure flexible hose with suitable material such as vinyl tape
to avoid the entry of air.

6.

Remove A/C compressor belt. Refer to 

EM-174, "DRIVE BELTS"

 .

7.

Disconnect compressor (magnet clutch and ECV) connectors.

8.

Remove mounting bolts from compressor, using power tools.

9.

Remove compressor downward of the vehicle.

INSTALLATION

Installation is basically the reverse order of removal.

CAUTION:

●

Replace O-rings of low-pressure flexible hose, low-pressure pipe (VK45DE) and high-pressure
flexible hose with new ones, and then apply compressor oil to it when installing it.

●

When recharging refrigerant, check for leaks.

Check Disc to Pulley Clearance

NJS000I7

Check clearance around entire periphery of clutch disc.

If specified clearance is not obtained, replace compressor.

RJIA4154E

RJIA4156E

Disc to pulley 
clearance

: 0.3 - 0.6 mm (0.012 - 0.024 in)

RHA087E

REFRIGERANT LINES

ATC-157

C

D

E

F

G

H

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K

L

M

A

B

ATC

Removal and Installation of Low-pressure Flexible Hose and Pipe

NJS000HP

REMOVAL

1.

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

2.

Remove engine cover. Refer to 

EM-15, "ENGINE ROOM COVER"

  (VQ35DE) or 

EM-173, "ENGINE

ROOM COVER"

  (VK45DE).

3.

Remove air cleaner case and air duct. Refer to 

EM-19, "AIR CLEANER AND AIR DUCT"

  (VQ35DE) or

EM-177, "AIR CLEANER AND AIR DUCT"

  (VK45DE).

4.

Remove cowl top cover. Refer to 

EI-18, "COWL TOP"

 .

5.

Remove mounting bolt from low-pressure flexible hose bracket.

6.

Disconnect one-touch joint between low-pressure flexible hose
and low-pressure pipe 1.

a.

Set a disconnector (SST: 9253089916) on A/C piping.

b.

Slide a disconnector toward vehicle front until it clicks.

c.

Slide A/C piping toward vehicle front and disconnect it.

CAUTION:

Cap or wrap the joint of low-pressure flexible hose and low-
pressure pipe 1 with suitable material such as vinyl tape to
avoid the entry of air.

7.

Remove mounting nut from low-pressure flexible hose
(VQ35DE).

CAUTION:

Cap or wrap the joint of compressor and low-pressure flexi-
ble hose with suitable material such as vinyl tape to avoid
the entry of air.

8.

Remove mounting nuts from low-pressure flexible hose and low-
pressure pipe (VK45DE).

CAUTION:

Cap or wrap the joint of compressor, low-pressure flexible
hose and low-pressure pipe with suitable material such as
vinyl tape to avoid the entry of air.

INSTALLATION

Installation is basically the reverse order of removal.

RJIA4159E

RJIA4160E

RJIA4162E

RJIA4161E

ATC-158

REFRIGERANT LINES

CAUTION:

●

Replace O-rings of low-pressure flexible hose and low-pressure pipe (VK45DE) with new ones,
and then apply compressor oil to it when installing it.

●

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.

●

When recharging refrigerant, check for leaks.

Removal and Installation of High-pressure Flexible Hose

NJS000HQ

REMOVAL

1.

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

2.

Remove engine cover. Refer to 

EM-15, "ENGINE ROOM COVER"

    (VQ35DE)  or 

EM-173, "ENGINE

ROOM COVER"

  (VK45DE).

3.

Remove air cleaner case and air duct. Refer to 

EM-19, "AIR CLEANER AND AIR DUCT"

  (VQ35DE) or

EM-177, "AIR CLEANER AND AIR DUCT"

  (VK45DE).

4.

Remove mounting bolt from high-pressure flexible hose bracket.

5.

Disconnect one-touch joint between high-pressure flexible hose
and condenser.

a.

Set a disconnector (SST: 9253089912) on A/C piping.

b.

Slide a disconnector backward until it clicks.

c.

Slide A/C piping backward and disconnect it.

CAUTION:

Cap or wrap the joint of condenser and high-pressure flexi-
ble hose with suitable material such as vinyl tape to avoid
the entry of air.

6.

Remove low-pressure pipe (VK45DE). Refer to 

ATC-157, "Removal and Installation of Low-pressure Flex-

ible Hose and Pipe"

 .

7.

Remove mounting nut from high-pressure flexible hose, and
then remove high-pressure flexible hose.

CAUTION:

Cap or wrap the joint of compressor and high-pressure flex-
ible hose with suitable material such as vinyl tape to avoid
the entry of air.

Low-pressure flexible hose bracket mounting bolt

: 4.2 N·m (0.43 kg-m, 37 in-lb)

RJIA4163E

RJIA4164E

RJIA4166E