I guess I didn't make my self clear. I depress the left pedal, pull the lock up into position, turn the wheel....it free spins either direction, and when I unlock and lower the deck it goes all the way down. I've only tried this 20-30 times and I have no control over the deck height. The "wheel" you reference does nothing, zip, nada, nil, zero adjusting.
My post is about what might be amiss. Thanks for the reply none the less.