Inspection and Assembly Requirements
1. O-ring seal surfaces must be free of dirt, lint, burrs and scratches. The O-ring and connector should be lubricated.^ Use Motorcraft Refrigerant Oil YN-12b or equivalent meeting Ford specification WSH-M1C231-B.
NOTE: Any time a hose or component connection leak is observed, the component and fitting must be separated, cleaned, and a new 0-ring installed.