Nissan Murano Z51. Manual - part 827

HA-24

< PREPARATION >

PREPARATION

• Refrigerant container fittings, service hose fittings and service equipment fittings (equipment that handles

refrigerant and/or lubricant) are different between CFC-12 (R-12) and HFC-134a (R-134a). This is to avoid
mixed use of the refrigerants/lubricant.

• Never use adapters that convert one size fitting to another. Refrigerant/lubricant contamination occurs and

compressor malfunction may result.

Tool name

Description

HFC-134a (R-134a) refrigerant

Container color: Light blue
Container marking: HFC-134a (R-
134a)
Fitting size: Thread size

• Large container 1/2

″

-16 ACME

NISSAN A/C System Oil Type S 
(DH-PS)

Type: Polyalkylene glycol oil (PAG), 
type S (DH-PS)
Application:
HFC-134a (R-134a) swash plate com-
pressors (Nissan only)

Capacity: 40 m

 (1.4 US fl oz., 1.4 

Imp fl oz.) 

S-NT196

S-NT197

LUBRICANT

HA-25

< PERIODIC MAINTENANCE >

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PERIODIC MAINTENANCE

LUBRICANT

Maintenance of Lubricant Quantity

INFOID:0000000005514529

The lubricant in the compressor circulates through the system with refrigerant. Add lubricant to the compres-
sor when replacing any component or after a large refrigerant leakage is occurred. It is important to maintain
the specified amount of lubricant.
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

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

CAUTION:

Never perform the lubricant return operation if excessive lubricant leakage is noted.

Is it successful?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

PERFORM LUBRICANT RETURN OPERATION, PROCEEDING ACCORDING TO THE FOLLOWING

PROCEDURE

1.

Start the engine, and set to the following conditions:

-

Engine speed: Idling to 1,200 rpm

-

A/C 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 approximately 10 minutes.

3.

Stop the engine.

>> GO TO 3.

3.

CHECK REPLACEMENT PART

Should the compressor be replaced?

YES

>> Refer to 

HA-26, "Lubricant Adjusting Procedure for Compressor Replacement"

.

NO

>> Refer to 

HA-25, "Lubricant Adjusting Procedure for Components Replacement Except Compres-

sor"

.

Lubricant Adjusting Procedure for Components Replacement Except Compressor

INFOID:0000000005514530

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

Name

: NISSAN A/C System Oil Type S

HA-26

< PERIODIC MAINTENANCE >

LUBRICANT

*1: No addition of lubricant is needed if the refrigerant leakage is small.

Lubricant Adjusting Procedure for Compressor Replacement

INFOID:0000000005514531

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 

HA-14, "Working with

HFC-134a (R-134a)"

 if NG.

3.

Confirm refrigerant purity in vehicle A/C system using recovery/recycling recharging equipment and refrig-
erant identifier. If NG, refer to 

HA-14, "Working with HFC-134a (R-134a)"

.

4.

Discharge refrigerant into the recovery/recycling equipment. Measure lubricant that is 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 that was 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 the amount that was drained from the old compres-
sor. Add this lubricant to the new compressor through the suction port opening.

8.

Measure an amount of new lubricant equal to the amount that was recovered during discharging. Add this
lubricant to the 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.

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 leakage

30 (1.0, 1.1)

Large leakage

—

Small leakage

 *1

LUBRICANT

HA-27

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Do not add this 5 m  (0.2 US fl oz., 0.2 Imp fl oz.) of lubricant when replacing the compressor only.

RJIA3578E