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Filling and adjusting the compressor oil

Filling and adjusting the compressor oil

The A/C system is filled with 120 ml of compressor oil. A specific amount of compressor oil is always lost in connection with draining the refrigerant and when replacing components. This quantity must always be refilled in order for system operation not to be impaired.

Filling of compressor oil should be done on the high pressure side or through the oil plug.

Important

Use the specified compressor oil.


For information about which compressor oil should be used, see Compressor (170) .

The table below shows how much compressor oil is lost in connection with different types of work on the A/C system:

Cause of the oil loss Lost quantity of oil
Draining refrigerant 15 ml
Ruptured A/C hose 30 ml
Hose replacement 15 ml
Condenser replacement 30 ml
Evaporator replacement 30 ml
Receiver replacement 30 ml
Expansion valve replacement 15 ml
Compressor replacement* 50 ml*


* Note the new compressor is supplied filled with 120 ml of oil. In order not to get too much oil in the A/C system, and in doing so impair cooling, oil must be drained from the compressor before it is fitted. How much depends on how much oil has been lost in connection with the replacement of other components. The A/C system should always contain 120 ml of compressor oil.

If only the compressor is replaced then 55 ml of oil should be drained from the new compressor (120-50-15=55) In this way the lost 65 ml is replaced (120-55=65).

Tightening torque, compressor oil plug 30 Nm (22 lbf ft)