Infiniti F50. Manual - part 124

REFRIGERATION SYSTEM

ATC-21

C

D

E

F

G

H

I

K

L

M

A

B

ATC

increase triggers pressure difference between the piston and the crankcase. The pressure difference
changes the angle of the wobble (swash) plate.

RJIA0852E

ATC-22

REFRIGERATION SYSTEM

Component Layout

EJS001Y5

RJIA0199E

LUBRICANT

ATC-23

C

D

E

F

G

H

I

K

L

M

A

B

ATC

LUBRICANT

PFP:KLG00

Maintenance of Lubricant Quantity in Compressor

EJS00096

The lubricant in the compressor circulates through the system with the refrigerant. Add lubricant to compres-
sor when replacing any component or after a large gas leakage occurred. It is important to maintain the speci-
fied amount.
If lubricant quantity is not maintained properly, the following malfunctions may result:

●

Lack of lubricant: May lead to a seized compressor

●

Excessive lubricant: Inadequate cooling (thermal exchange interference)

LUBRICANT

LUBRICANT RETURN OPERATION

Adjust the lubricant quantity according to the test group shown below.

1. 

CHECK LUBRICANT RETURN OPERATION

Can lubricant return operation be performed?

●

A/C system works properly.

●

There is no evidence of a large amount of lubricant leakage.

YES or NO

YES

>> GO TO 2.

NO

>> GO TO 3.

2. 

PERFORM LUBRICANT RETURN OPERATION, PROCEEDING AS FOLLOWS:

1.

Start engine, and set the following conditions:

–

Test condition
Engine speed: Idling to 1,200 rpm
A/C or AUTO switch: ON
Blower speed: Max. position
Temp. control: Optional [Set so that intake air temperature is 25 to 30

°

C (77 to 86

°

F).]

Intake position: Recirculation (REC)

2.

Perform lubricant return operation for about 10 minutes.

3.

Stop engine.

CAUTION:

If excessive lubricant leakage is noted, do not perform the lubricant return operation.

>> GO TO 3.

3. 

CHECK COMPRESSOR

Should the compressor be replaced?

YES or NO

YES

>> Go to 

ATC-24, "LUBRICANT ADJUSTING PROCEDURE FOR COMPRESSOR REPLACE-

MENT"

 .

NO

>> GO TO 4.

Name

:Nissan A/C System Oil Type S

Part number

:KLH00-PAGS0

ATC-24

LUBRICANT

4. 

CHECK ANY PART

Is there any part to be replaced? (Evaporator, condenser, liquid tank or in case there is evidence of a large
amount of lubricant leakage.)

YES or NO

YES

>> Go to 

ATC-24, "LUBRICANT ADJUSTING PROCEDURE FOR COMPONENTS REPLACEMENT

EXCEPT COMPRESSOR"

 .

NO

>> Carry out the A/C performance test.

LUBRICANT ADJUSTING PROCEDURE FOR COMPONENTS REPLACEMENT EXCEPT COM-
PRESSOR

After replacing any of the following major components, add the correct amount of lubricant to the system.
Amount of lubricant to be added

*1:If refrigerant leak is small, no addition of lubricant is needed.

LUBRICANT ADJUSTING PROCEDURE FOR COMPRESSOR REPLACEMENT 

1.

Before connecting ACR4 to vehicle, check ACR4 gauges. No refrigerant pressure should be displayed. If
NG, recover refrigerant from equipment lines.

2.

Connect ACR4 to vehicle. Confirm refrigerant purity in supply tank using ACR4 and refrigerant identifier. If
NG, refer to 

ATC-5, "CONTAMINATED REFRIGERANT"

 .

3.

Confirm refrigerant purity in vehicle A/C system using ACR4 and refrigerant identifier. If NG, refer to 

ATC-

5, "CONTAMINATED REFRIGERANT"

 .

4.

Discharge refrigerant into the refrigerant recovery/recycling equipment. Measure lubricant discharged into
the recovery/recycling equipment.

5.

Drain the lubricant from the old (removed) compressor into a graduated container and recover the amount
of lubricant drained.

6.

Drain the lubricant from the new compressor into a separate, clean container.

7.

Measure an amount of new lubricant installed equal to amount drained from old compressor. Add this
lubricant to new compressor through the suction port opening.

8.

Measure an amount of new lubricant equal to the amount recovered during discharging. Add this lubricant
to new compressor through the suction port opening.

9.

If the liquid tank also needs to be replaced, add an additional 5 m  (0.2 US fl oz, 0.2 Imp fl oz) of lubricant
at this time.
Do not add this 5 m  (0.2 US fl oz, 0.2 Imp fl oz) of lubricant if only replacing the compressor.

Part replaced

Lubricant to be added to system

Remarks

Amount of lubricant

m

  (US fl oz, Imp fl oz)

Evaporator

75 (2.5, 2.6)

-

Condenser

35 (1.2, 1.2)

-

Liquid tank

10 (0.3, 0.4)

-

In case of refrigerant leak

30 (1.0, 1.1)

Large leak

-

Small leak *1