In accordance with an example embodiment, a mower-conditioner may includefirst andsecond conditioning rolls, at least one eccentric assembly, and a linkage. Thefirst andsecond conditioning rolls are spaced apart a distance. The at least oneeccentric assembly iscoupled to the mower-conditioner. The linkage is coupled between the eccentricassemblyand the first conditioning roll. The movement of the at least one eccentricassembly causesthe first conditioning roll to move via the linkage, which adjusts thedistance between thefirst and second conditioning rolls.