F 450 2WD Super Duty V10-6.8L VIN S (1999)
2. Install the O-ring seal.
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Lubricate the O-ring seal with Motorcraft YN-12c refrigerant oil or equivalent meeting Ford specification WSH-M1C231-B.
CAUTION: Use only new green O-rings. The use of any O-ring seals other than specified may result in intermittent leakage during vehicle
operation.
3. Lubricate the inside of the fittings with Motorcraft YN-12c refrigerant oil or equivalent meeting Ford specification WSH-M1C231-B.
4. Assemble the male and female fittings together.
NOTE: When properly assembled the male and female fittings should be flush.