Adjustment arrangement for a sieve in an agricultural harvester

A sieve for use in an agricultural harvester, the sieve comprising:

• a framework including a pair of opposed side members, and a first cross member extending between the side members at one end of the side members;
• a plurality of louvres extending between the pair of opposed side members;
• a pair of adjustment laths, each of the adjustment laths being associated with and movable generally parallel to a respective one of the side members, each of the adjustment laths also being connected with the plurality of louvres;
• and
• an adjustment arrangement positioned below the plurality of louvres, the adjustment arrangement including an actuator and a frame, one end of the actuator being connected to the first cross member and the other end of the actuator being connected to the frame, the frame having a pair of outboard ends with each of the outboard ends being connected to a respective one of the adjustment laths,
• wherein the frame has a generally triangular configuration with a first leg defining the outboard ends of the frame,
• wherein the triangular configuration of the frame has an apex opposite the first leg,
• wherein the frame has a second leg and a third leg defining the apex, at an obtuse angle therebetween, with the second leg and the third leg being configured to direct dust toward the opposed side members of the framework during operation,
• wherein the actuator is connected to either the first leg or the apex.