Expedition 4WD V8-281 4.6L SOHC (1998)
Refrigerant Oil: Service and Repair
Compressor Oil
Adding Refrigerant Oil
CAUTION: During normal A/C operation, oil is circulated through the system with the refrigerant, and a small amount is retained in each component.
If certain components of the system are removed for replacement, some of the refrigerant oil will go with the component. To maintain the original total
oil charge, it is necessary to compensate for the oil lost by adding oil to the system with the replacement part.
1. Rotate the A/C compressor shaft six to eight revolutions while collecting oil in a clean measuring device.
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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 F2AZ-19577-AC (Canada: Motorcraft CYN-12b) or equivalent meeting Ford specification
WSH-M1C231-B into the new A/C compressor.
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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 F2AZ-19577-AC (Canada: Motorcraft CYN-12b) or equivalent meeting Ford specification
WSH-M1C231-B into the new A/C compressor.
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If the amount of oil that was removed from the old A/C compressor is less than 85 ml (3 ounces), pour 85 ml (3 ounces) of clean Motorcraft
YN-12b refrigerant oil F2AZ-19577-AC (Canada: Motorcraft CYN-12b) or equivalent meeting Ford specification WSH-M1C231-B into the
new A/C compressor
NOTE: Service A/C compressors are shipped without compressor oil.
2. For the suction accumulator/drier, drill two 1/2 inch holes in the suction accumulator/drier cylinder and drain the oil into a calibrated container.
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Add a quantity of new oil to match that drained from the old suction accumulator/drier plus 60 ml (2 ounces) of clean Motorcraft YN-12b
refrigerant oil F2AZ-19577-AC (Canada: Motorcraft CYN-12b) or equivalent meeting Ford specification WSH-M1C231-B.
3. For the A/C evaporator core, add 89 ml (3 ounces) of clean Motorcraft YN-12b refrigerant oil F2AZ-19577-AC (Canada: Motorcraft CYN-12b)
or equivalent meeting Ford specification WSH-M1C231-B to the suction accumulator/drier inlet tube.
