Compressor Oil
REFRIGERANT OIL ADDITION DURING A/C COMPRESSOR REPLACEMENTWhenever the A/C compressor is replaced, and evidence of debris is present within the A/C system, the following must also be accomplished:
^ Replace the suction accumulator/drier.
^ Replace the A/C evaporator core orifice.
^ Clean the A/C system by flushing or filtering.
NOTE: Service A/C compressors are shipped without compressor oil.
When reinstalling the existing A/C compressor or installing a new A/C compressor, the A/C compressor must be serviced with the correct amount of Motorcraft YN-12b refrigerant oil or equivalent meeting Ford specification WSH-M1C231-B as follows:
1. Obtain a clean container that can also be used as a measuring device.
2. Place the A/C clutch on the A/C compressor shaft so the shaft can be rotated.
3. Rotate the shaft by hand six to eight revolutions, collecting the oil in a clean measuring device.
4. If the amount of oil drained from the old A/C compressor is between 85-142 ml (3-5 ounces), pour the same amount plus 30 ml (1 ounce) of clean Motorcraft YN-12b refrigerant oil or equivalent meeting Ford specification WSH-M1C231-B into the new A/C compressor.
5. If the amount of oil that was removed from the old A/C compressor is greater than 142 ml (5 ounces), pour the same amount drained of clean Motorcraft YN-12b refrigerant oil or equivalent meeting Ford specification WSH-M1C231-B into the new A/C compressor.
6. If the amount of refrigerant oil that was removed from the old A/C compressor is less than 89 ml (3 ounces), pour 89 ml (3 ounces) of clean Motorcraft YN-12b refrigerant oil or equivalent meeting Ford specification WSH-M1C231-B into the new A/C compressor.