How do I properly level the WTW6200SW washing machine during installation?

Slide the washer to its final location, push on the upper front panel to ensure it is resting on its rear feet, then lower the right front foot until it contacts the floor and rotate it firmly up to an additional 1½ turns. Check levelness by placing a level on the lid near the console and on the side of the washer, adjusting feet up or down as needed. Use a 9/16" or 14 mm open-end wrench to tighten the locknut counterclockwise against the washer cabinet, as a loose locknut can cause vibration. (Page 10)