Work vehicle operator station with arm height adjustment mechanism

An operator station is provided for a work vehicle cab. The operator station includes a base frame; an operator chair including a chair frame; and a chair arm. A chair arm adjustment mechanism includes a mounting post and the chair frame; a clamp configured to fit about the mounting post; a tie rod; and a lever. The lever is movable into a first pivotal position to move the tie rod to substantially disengage the clamp surface from the post surface, and the lever is movable into a second pivotal position to move the tie rod to substantially engage the clamp surface on the post surface. When the clamp surface is disengaged, the chair arm body is movable along the post axis, and when the clamp surface is engaged with the post surface, the chair arm body, at least in part, is fixed along the post axis.