Nissan GT-R (R35) · Service Manual VENTILATION, HEATER & AIR CONDITIONER

LUBRICANT

Description

 
 MAINTENANCE OF LUBRICANT QUANTITY

The lubricant in the compressor circulates through the system with the refrigerant. Add lubricant to compressor when replacing any component or after a large refrigerant leakage occurred. It is important to maintain the specified amount.
The following malfunctions may result if lubricant quantity is not maintained normally:
  • Lack of lubricant: May lead to a seized compressor.
  • Excessive lubricant: Inadequate cooling (thermal exchange interference)
 
 LUBRICANT


Name
 		: NISSAN A/C System Oil Type S

Adjustment

 
 LUBRICANT RETURN OPERATION

Adjust the lubricant quantity according to the test group shown below.
 
 1.CHECK A/C SYSTEM
 
 2.PERFORM LUBRICANT RETURN OPERATION
 
 3.REPAIR OR REPLACE MALFUNCTIONING PART

Lubricant Adjusting Procedure for Components Replacement Except Compressor


Add the correct amount of lubricant to the system after replacing any of the following major components.
Amount of lubricant to be added:

Replaced part
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 leakage
30 (1.0, 1.1)
Large leakage
—
Small leakage *1
*1: No addition of lubricant is needed if the refrigerant leakage is small.

Lubricant Adjusting Procedure for Compressor Replacement


    1.Check recovery/recycling recharging equipment gauges before connecting recovery/recycling recharging equipment to vehicle. No refrigerant pressure should be displayed. Recover refrigerant from equipment lines if NG.
    2.Connect recovery/recycling recharging equipment to vehicle. Confirm refrigerant purity in supply tank using recovery/recycling recharging equipment and refrigerant identifier. Refer to Working with HFC-134a (R-134a) if NG.
    3.Confirm refrigerant purity in vehicle A/C system using recovery/recycling recharging equipment and refrigerant identifier. If NG, refer to Working with HFC-134a (R-134a).
    4.Discharge refrigerant into the recovery/recycling recharging equipment. Measure lubricant discharged into the recovery/recycling recharging 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. Then 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.Add another 5 m (0.2 US fl oz., 0.2 Imp fl oz.) of lubricant at this time if the liquid tank also needs to be replaced.Do not add this 5 m (0.2 US fl oz., 0.2 Imp fl oz.) of lubricant when replacing the compressor only.

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