I am trying to level deck and figure out height adjustment procedure/operation.
Pretty common question seen at WFM, do a search over there and you'll find the guidance. But I agree with your interest for a manual, you'll want one sooner or later so might as well be sooner.
I'm not as familiar with the 314, but I bet the procedure is roughly:
-park on level ground/concrete
-cycle the lift lever to release rockshaft cylinder pressure.
-set deck wheels to desired nominal height (2.5", 3", etc.)
-adjust rockshaft stop until front deck wheels are about 1/4" off the ground.
-adjust rear deck lift linkages so that the deck is level side to side, and so that the rear of the deck is slightly (1/8") higher than the front of the deck.
-recheck front wheels to be about 1/4" off level ground, and that the rockshaft cylinder is relieved of pressure. Repeat process if necessary.
Measure blade height, not deck wheels, since the blade height is what determines the height of your cut, and the wheels might be off a bit compared to your blades.
Again, I don't have a 314, but I think it's pretty similar to my 322.