Climate Units - General Information: Maintenance Volvo XC90 I

TOPPING UP THE LUBRICATING OIL

Note. Too much lubrication oil will impair cooling. Too little lubrication oil will damage the compressor.

The oil must be topped up when repairing a leak or when replacing a component. The quantity required for the component in question will depend on whether leakage has taken place slowly or quickly.

Slow leakage (longer than 24 hours)

With a slow leak, there is normally minimal risk of oil loss.

When installing new components the following procedures apply

Rapid leakage (e. g. hose rupture)

Rapid leakage often means that lubricating oil escapes with the refrigerant.

When replacing components, the following oil volumes shall be found in the new components or shall be filled in the system through the service valve, except for the compressor

Compressor

Oil return when reusing compressor

1. measure the volume of the oil drained from the compressor
2. replace the volume of drained oil according to the table below

Oil return when replacing compressor

1. Drain the old compressor of oil, and measure the amount.
2. Drain the new compressor of oil (the amount may be below specified value since it is not possible to drain all oil from the compressor).
3. Use the table below to fill the new compressor with the right amount of oil.