Place a level on the top of the washing machine to determine if it is level.
Determine which leg you would like to raise or lower to level the washer. When looking at the level, the bubble will rise to the side with the furthest extended leg. To determine whether to raise or lower the dryer, look at the amount of threading exposed on the legs. If the legs are already greatly extended and a lot of threading is showing, you should lower the higher leg. However, if the legs are not extended, showing little threading, you should raise the lower leg to the same level as the higher leg to level the washer.
Gently raise the side of the washer that you have decided to adjust and slide the wooden block under it to remove the washer's weight from the leg.
Loosen the lock nut on the top of the pedestal leg with an adjustable wrench. Set the adjustable wrench to fit the lock nut and then turn it counterclockwise to move it away from the pedestal base.
Turn the leg with the adjustable wrench clockwise to lower it or counterclockwise to raise it.
Re-secure the leg's lock nut by turning the adjustable wrench clockwise once the washing machine is level to ensure that the legs do not move in the future.