F 350 4WD Super Duty V10-6.8L VIN S (2004)
Accumulator HVAC: Service Precautions
CAUTION:
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Refrigerant Compressor Oil (mineral oil) F73Z-19577-AA (Motorcraft YN-9-A) should be used to lubricate R-134a refrigerant system
O-ring seals only and should not be added to R-134a refrigerant systems as an A/C compressor lubricant. PAG Refrigerant Compressor
Oil (R-134a Systems) F7AZ-19589-DA (Motorcraft YN-12-C) or equivalent meeting Ford specification WSH-M1C231-B only should be
used as an A/C compressor lubricant.
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To prevent damage to the fitting and the tube, use a backup wrench when loosening or tightening the fitting nut.
