Nissan Armada 2025-2026 Service and Repair Manual: Lubricant

Description

MAINTENANCE OF LUBRICANT LEVEL

The compressor lubricant is circulating in the system together with the refrigerant. It is necessary to fill A/C compressor with lubricant when replacing A/C system parts or when a large amount of refrigerant leakage is detected. It is important to always maintain lubricant level within the specified level. Or otherwise, the following conditions may occur.

• Insufficient lubricant amount: Stuck A/C compressor

• Excessive lubricant amount: Insufficient cooling (caused by insufficient heat exchange)

Name	: Refer to Lubricant.

Inspection

If a A/C compressor is malfunctioning (internal noise, insufficient cooling), check the compressor oil.

COMPRESSOR OIL JUDGMENT

1. Remove the A/C compressor. Refer to Removal and Installation.

2. Sample a compressor oil and judge on the figure.

Judgement result 1

Replace A/C compressor only.

Judgement result 2

Replace A/C compressor and condenser & liquid tank.

Perform Lubricant Return Operation

CAUTION:

If a large amount of refrigerant or lubricant leakage is detected, never perform lubricant return operation.

Start the engine and set to the following conditions.

• Engine speed: Idling to 1,200 rpm

• A/C switch: ON

• Fan (blower) speed: Maximum speed set

• Intake door position: Recirculation

• Temperature setting: Full cold

Perform lubricant return operation for approximately 10 minutes.

Stop the engine.

Lubricant return operation is complete.

Lubricant Adjusting Procedure for Components Replacement Except A/C compressor

Fill with lubricant for the amount that is calculated according to the following conditions.

Example: Lubricant amount to be added when replacing evaporator (front) and condenser & liquid tank [m (US fl oz, Imp fl oz)] = 45 (1.5, 1.6) + 45 (1.5, 1.6) + α

Conditions		Lubricant amount to be added to A/C system m (US fl oz, Imp fl oz)
Replace evaporator	Front	45 (1.5, 1.6)
	Rear	25 (0.8, 0.9)
Replace condenser & liquid tank		45 (1.5, 1.6)
Refrigerant leakage is detected	Large amount leakage	30 (1.0, 1.1)
	Small amount leakage	—
Lubricant amount that is recycled together with refrigerant during recycle operation		α

Lubricant Adjusting Procedure for A/C compressor Replacement

Drain lubricant from removed A/C compressor and measure lubricant amount.Remove drain bolt , and then drain lubricant from drain port while rotating magnet clutch.

Measure total amount of lubricant that is drained from removed A/C compressor.

Drain lubricant from a new A/C compressor that is calculated according to the following conditions.

Amount to be drained (A) [m (US fl oz, Imp fl oz)] = F − (D + S + R + α)
F	: Lubricant amount that a new A/C compressor contains [150 (5.1, 5.3)]
D	: Lubricant amount that is drained from removed A/C compressor
S	: Lubricant amount that remains inside of removed A/C compressor [20 (0.7, 0.7)]
R	: Lubricant amount to be added according to components that are removed except A/C compressor
α	: Lubricant amount that is recycled together with refrigerant during recycle operation

CAUTION:

If lubricant amount that is drained from removed A/C compressor is less than 40 m (1.4 US fl oz, 1.4 Imp fl oz), perform calculation by setting “D” as 40 m (1.4 US fl oz, 1.4 Imp fl oz).

Conditions		Lubricant amount to be added to A/C system m (US fl oz, Imp fl oz)
Replace evaporator	Front	45 (1.5, 1.6)
	Rear	25 (0.8, 0.9)
Replace condenser & liquid tank		45 (1.5, 1.6)

Example: Lubricant amount to be drained from a new A/C compressor when replacing A/C compressor and condenser & liquid tank [m (US fl oz, Imp fl oz)] [D = 60 (2.0, 2.1), α = 5 (0.2, 0.2)]

150 (5.1, 5.3) − [60 (2.0, 2.1) + 20 (0.7, 0.7) + 45 (1.5, 1.6) + 5 (0.2, 0.2)] = 20 (0.7, 0.7)

Tighten drain bolt to the specified torque.

Specified torque

: 30 N·m (3.1 kg-m, 22 ft-lb)

Install A/C compressor and check the operation.