Maintenance and service operations

MAINTENANCE AND SERVICE OPERATIONS

Lubricant oil

The compressor is lubricated with about 150 ± 20 cc of oil type ND9. Use only oil type ND9 for topping up or changes.

In the case of service operations that involve the replacement of certain system components such as the condenser or evaporator, add 40 cc of oil for each part replaced.

If the compressor is replaced, new compressors are supplied with the required amount of oil. For this reason, prior to installation on the vehicle, remove a quantity of oil corresponding to the amount remaining in the system. To do this:

New compressors are supplied pressurised with nitrogen to prevent the entrance of moisture and impurities. When fitting, therefore, remove the inlet and outlet fitting plugs slowly and with the compressor positioned exactly as shown in the figure below (with the cover facing upward).

1. Remove the oil separator device (A) secured close to the compressor outlet fitting, which must be replaced.
2. Pour the quantity of oil in the compressor into graduated burette (C) taking care to drain the contents well.
3. Remove the oil separator device (A) from the new compressor and pour the quantity of oil contained into a graduated burette (D), taking care to drain the contents properly.
4. Remove the excess quantity of oil (E) corresponding to the difference between the quantity of oil in burette (C) and burette (D) (E=D-C).

The oil is highly hygroscopic: avoid leaving the tins open.
Avoid leaving the compressor or any other part detached from the system for longer than necessary.
Do not overturn or tilt the compressor when the oil separator device (A) is not fitted.

Calculating the quantity of lubricant oil to be added to compressor.