The construction and mining equipment maker's machinery sales remained sluggish as sales in N. America, Caterpillar's (CAT) largest regional segment, fell 18% from a year ago. N. American sales fell 11% in March and 12% in Feb. Asia sales fell 20% on weak demand for construction equipment in China. Sales in Europe, Africa and the Middle East dipped 3%. Latin America was the lone bright spot with a 28% jump in April sales. Shares rose 0.8% to 88.33 .