Infiniti F50. Manual - part 155

REFRIGERANT LINES

ATC-145

C

D

E

F

G

H

I

K

L

M

A

B

ATC

Compressor Clutch

EJS000KF

REMOVAL
Overhaul

1.

When removing center bolt, hold clutch disc with a wrench.

2.

Remove clutch disc using the clutch disc puller.

3.

Remove snap ring using external snap ring pliers.

Nut mounting the high-pressure flexible hose

Tightening torque

: 7.8 - 19.6 N·m (0.8 - 1.9 kg·m, 69 - 173 in-lb)

Nut mounting the low-pressure flexible hose

Tightening torque

: 7.8 - 19.6 N·m (0.8 - 1.9 kg·m, 69 - 173 in-lb)

RHA136EB

RHA399F

RHA124F

RHA138E

ATC-146

REFRIGERANT LINES

4.

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

5.

Remove field coil harness clip using a pair of pliers.

6.

Remove snap ring using external snap ring pliers.

Inspection

Clutch disc
If the contact surface shows signs of damage due to excessive heat,
replace clutch disc and pulley.

Pulley
Check appearance of the pulley assembly. If contact surface of pul-
ley shows signs of excessive grooving, replace clutch disc and pul-
ley. Pulley assembly contact surfaces should be cleaned with a
suitable solvent before reinstallation.

Coil

Check coil for loose connection or cracked insulation.

RHA139E

RHA125F

RHA145E

RHA126F

REFRIGERANT LINES

ATC-147

C

D

E

F

G

H

I

K

L

M

A

B

ATC

INSTALLATION

1.

Install field coil.
Be sure to align coil pin with hole in the front head of the com-
pressor.

2.

Install field coil harness clip using a screwdriver.

3.

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

4.

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

5.

Using a holder to prevent clutch disc rotation, tighten the bolt to
14 N·m (1.4 kg·m, 10 ft-lb) torque.
After tightening the bolt, insure the pulley rotates smoothly.

RHA142E

RHA143EA

RHA127F

RHA086E

ATC-148

REFRIGERANT LINES

6.

Check clearance around the entire periphery of clutch disc.

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

Break-In Operation

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

Low-Pressure Flexible Hose

EJS000A7

REMOVAL

1.

Remove air cleaner cover. Refer to 

EM-11, "ENGINE ROOM COVER"

 .

2.

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

3.

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

CO-9, "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-15, "AIR CLEANER AND AIR DUCT"

 .

5.

Remove vehicle harness from the clip.

6.

Remove mounting bolts from the low-pressure flexible hose
bracket.

7.

Remove clip from the low-pressure flexible hose.

8.

Remove mounting bolts from the low-pressure flexible hose.

CAUTION:

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

9.

Remove low-pressure flexible hose.

INSTALLATION

Installation is basically the reverse order of removal.

CAUTION:

●

Replace low-pressure flexible hose O-ring with a new one. Apply compressor oil prior to installa-
tion.

●

When pouring refrigerant, check for leaks.

Disc to pulley clear-
ance:

0.25 - 0.6 mm (0.010 - 0.024 in)

RJIA0965E

RJIA0318E

RJIA0328E

Bolt mounting the low-pressure flexible hose and the high-pressure 
pipe (evaporator side)

Tightening torque

: 2.9 - 5.9 N·m (0.29 - 0.6 kg·m, 26 - 52 in-lb)

Bolt mounting the low-pressure flexible hose (compressor side)

Tightening torque

: 7.8 - 19.6 N·m (0.8 - 1.9 kg·m, 69 - 173 in-lb)