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Oil in the A/C system






Oil in the A/C system

Special tools:

951 1204 REMOVAL TOOL 951 1204 Removal Tool

Topping up the lubricating oil

Warning! Do not mix oil types. Always use the correct type of compressor oil.


Note! Too much lubricating oil will impair cooling. Too little lubricating 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.




Compressor

Preparatory operations for oil return
- Measure the volume of the oil drained from the compressor
- Replace the volume of drained oil according to the table below:






Caution! When installing a completely new system: Check that there is oil in the compressor. The other components should contain no oil.

Replacing the receiver

Replace the receiver in the following instances:
- When replacing the compressor (compressor seizure for example)
- Refrigerant leakage, where nearly 100% has leaked out of the system. (The system has no pressure)
- When replacing any air conditioning (A/C) component outside the warranty period.

Filling the A/C system with oil

Note! Fill with oil before vacuum pumping.

Filling with PAG oil
When replacing pipes or hoses the oil can be filled through the service valve.
The procedure for topping up PAG oil (P/N 8708581-7) in the car is as follows:
- Remove the needle valve in the service valve using valve tool 951 1204 REMOVAL TOOL 951 1204 Removal Tool.




Use the filling syringe (without plastic hose) supplied with the unit to top up the oil. Clean the syringe to avoid the possibility of mixing different types of oil.
- Check according to the table above. Measure how much oil is to be added. After topping up the oil, reinstall the needle valve.

Note! Use only your thumb and index finger when tightening the service valve using valve needle tool 951 1204 REMOVAL TOOL 951 1204 Removal Tool. This is to prevent damage to the seal on the valve.