Refrigerant Oil Addition

DURING A/C COMPRESSOR REPLACEMENT

1. A new FS-1O service replacement A/C compressor contains refrigerant oil and must be drained into a clean container before any oil is added. If the amount of oil drained from the removed A/C compressor is between 85 and 142 ml (3 oz. to 5 oz.), pour the same amount plus 1 (one) ounce of clean oil into the new A/C compressor. If the amount of oil drained from the old A/C compressor is greater than 142 ml (5 oz.), pour only 142 ml (5 oz.) of clean refrigerant oil into the new A/C compressor. If the amount of refrigerant oil drained from the old A/C compressor is less than 85 ml (3 oz.), pour 85 ml (3 oz.) of clean refrigerant oil into the new compressor.
^ When replacing components of the air-conditioning refrigerant system, add oil to the replacement components.

DURING COMPONENT REPLACEMENT

1. Clean refrigerant oil should be added to the replacement components as follows:
^ Use Motorcraft YN-12b refrigerant oil or equivalent meeting Ford specification WSH-M1C231-B.
^ A/C evaporator core - Add 90 ml (3 fluid ounces).
^ A/C condenser core - Add 30 ml (1 fluid ounce).
^ Drain the oil from the removed suction accumulator/drier into a suitable measuring container. It may be necessary to drill one or two 12.7 mm (1/2 inch) holes in the bottom of the old suction accumulator/drier to make sure that all the oil has drained out. Add the same amount of clean new refrigerant oil that was removed, plus 59 ml (two fluid ounces) to the new suction accumulator/drier. Use only the oil specified for the specific vehicle being serviced.