Discovery II (LT) V8-4.6L (2003)
Compressor HVAC: Procedures
Air Conditioning Compressor Replacement
A new compressor is supplied filled with a full charge (X cu. cm) of refrigerant oil.
A calculated quantity of oil must be drained from the new compressor before fitting. To calculate the quantity of oil to be drained:
1
Remove the drain plug from the old compressor.
2
Invert the compressor and gravity drain the oil into a calibrated measuring cylinder. Rotate the compressor clutch to ensure the compressor is
completely drained.
3
Note the quantity of oil drained (Y cu. cm).
4
Calculate the quantity of oil to be drained from the new compressor using the following formula:
X cu. cm - (Y cu. cm + 20 cu. cm) = Q cu. cm
5
Remove the drain plug from the new compressor and drain Q cu. cm of oil. Fit and tighten the compressor drain plug.