AC-System, Oil, Refilling

AC-system, oil, refilling

Special tools:

951 1204 REMOVAL TOOL 951 1204 Removal Tool

Preparatory work

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.
Rapid leakage (for example hose rupture)
Rapid leakage often means that lubricating oil escapes with the refrigerant.
Replacing components
When replacing components, the oil volumes set out below must be present in the new components or filled into the system through the service valve, except for the compressor. See Compressor below.




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.





New compressor
A new compressor intended for the engine type has the correct volume of oil from the factory.

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 (system depressurized).
- When replacing any air conditioning (A/C) component outside the warranty period.
- When the system has been open / unplugged for more than 10 minutes.

Filling the A/C system with oil

Filling with PAG oil





Note! On newer filling/draining/vacuum pumping stations there is a reservoir for injecting oil. This can be used before filling with refrigerant and after vacuum pumping without needing to remove the needle valve in the service valve.

Caution! Fill with oil before vacuum pumping.

Note! When replacing pipes or hoses the oil can be filled through the service valve.

Remove the needle valve in the service valve. Use: 951 1204 REMOVAL TOOL 951 1204 Removal Tool.
Use the filling syringe. 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.