F 450 2WD Super Duty V10-6.8L VIN S (1999)
1. Install the A/C tube lock coupling spring.
2. Lubricate the inside of the coupling with Motorcraft YN-12c refrigerant oil or equivalent meeting Ford specification WSH-M1C231-B.
3. Install the O-ring seals.
-
Lubricate the O-ring seals 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.
4. Connect the spring lock coupling fittings with a twisting motion until the A/C tube lock coupling spring snaps over the flared end of the female
fitting.