Traditionally, the chore of adjusting leg belt tension on a bucket elevator has been more art than science. "If you ask any grain person who works with legs how he adjusts the belt tension, you'll find there's a lot of guesswork," says Gregg Rumbold,operations manager for Rumbold & Kuhn Inc., a privately-held grain company based in Wyoming, IL (309-695-6431), which operates eight grain elevators and more than 20 legs in northwest Illinois. "He might try pulling on the belt and releasing it, and if it snaps back twice,
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