Ford Shop Manual says....
5. While rotating the wheel, hub- and rotor assembly in a counterclockwise direction, tighten the adjusting nut to 17 - 25 ft-lb to seat the bearings.
6. Loosen the adjusting nut one-half turn, and then retighten Ford spec is for the final tightening is closer to 20 in-lbs.
7. Place the nut retainer on the adjusting nut, so the castellation on the retainer are in-line with the cotter pin hole in the spindle.
8. Install a new cotter pin, and bend the ends around the castellation flange of the nut retainer.
9. Check front wheel rotation. If the wheel rotates properly, install the grease cap and wheel cover. If rotation is noisy and rough, follow procedures under "Replacement and Lubrication.
10. Before driving the vehicle, pump the brake pedal several times to restore normal brake pedal travel.