Infiniti Q45. Manual - part 139

REFRIGERANT LINES

ATC-151

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B

ATC

3.

Remove snap ring using external snap ring pliers.

4.

Position center pulley puller on the end of the drive shaft, and
remove pulley assembly using any commercially available pul-
ley puller.
To prevent pulley groove from being deformed, puller claws
should be positioned into the edge of pulley assembly.

5.

Remove field coil harness clip using a pair of pliers.

6.

Remove snap ring using external snap ring pliers.

RHA138E

RHA139E

RHA125F

RHA145E

ATC-152

REFRIGERANT LINES

Inspection

Clutch disc
If the contact surface shows signs of damage due to excessive heat,
replace clutch disc and pulley.
Pulley
Check appearance of pulley assembly. If contact surface of pulley
shows signs of excessive grooving, replace clutch disc and pulley.
The contact surfaces should be cleaned with a suitable solvent
before reinstallation.
Coil
Check coil for loose connection or cracked insulation.

INSTALLATION

1.

Install field coil.
Be sure to align coil’s pin with the hole in compressor’s front
head.

2.

Install field coil harness clip using a screwdriver.

3.

Install pulley assembly using installer (SST) and a hand press,
and then install snap ring using snap ring pliers.

4.

Install clutch disc on drive shaft, together with original shim(s).
Press clutch disc down by hand.

RHA126F

RHA142E

RHA143EA

RHA127F

REFRIGERANT LINES

ATC-153

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ATC

5.

Using a holder to prevent clutch disc rotation.

After tightening the bolt, make sure the pulley rotates smoothly.

6.

Check clearance around the entire periphery of clutch disc.

If specified clearance is not obtained, replace adjusting spacer
and readjust.

Break-In Operation

When replacing compressor clutch assembly, always carry out break-in operation. This is done by engaging
and disengaging clutch about thirty-times. Break-in operation raises level of transmitted torque.

Removal and Installation of Low-Pressure Flexible Hose and Pipe

NJS0009L

REMOVAL

1.

Remove engine cover and air cleaner cover, using power tools. Refer to 

EM-13, "ENGINE ROOM

COVER"

 .

2.

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

3.

Drain coolant from cooling system, and disconnect two heater
hoses. Refer to 

CO-8, "Changing Engine Coolant"

 .

4.

Remove tower bar, air cleaner assembly, air duct and air inlet
pipe. Refer to 

FSU-5, "FRONT SUSPENSION ASSEMBLY"

and 

EM-17, "AIR CLEANER AND AIR DUCT"

 .

5.

Remove low-pressure flexible hose from clip.

: 14 N·m (1.4 kg-m, 10 ft-lb)

RHA086E

Disc to pulley 
clearance

: 0.25 - 0.6 mm (0.010 - 0.024 in)

RJIA0965E

RJIA0318E

RJIA3209E

ATC-154

REFRIGERANT LINES

6.

Remove vehicle harness from clip.

7.

Remove mounting bolts from low-pressure flexible hose bracket.

8.

Remove clip from low-pressure flexible hose.

9.

Remove mounting nut from low-pressure flexible hose.

CAUTION:

Cap or wrap the joint of the pipe with a suitable material
such as vinyl tape to avoid the entry of air.

10. Remove low-pressure flexible hose.

11. Remove high-pressure flexible hose from compressor.

12. Remove mounting nut, and then remove low-pressure pipe.

INSTALLATION

Installation is basically the reverse order of removal.

CAUTION:

●

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

●

When recharging refrigerant, check for leaks.

Removal and Installation of High-Pressure Flexible Hose

NJS0009M

REMOVAL

1.

Remove engine cover and air cleaner cover, using power tools. Refer to 

EM-13, "ENGINE ROOM

COVER"

 .

2.

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

3.

Remove air cleaner assembly, air duct and air inlet pipe. Refer to 

EM-17, "AIR CLEANER AND AIR

DUCT"

 .

4.

Remove low-pressure flexible hose from low-pressure pipe. Refer to 

ATC-153, "Removal and Installation

of Low-Pressure Flexible Hose and Pipe"

 .

RJIA0328E

RJIA2693E

RJIA2694E