This tensioner maintains the correct belt or chain tension on the driven assembly of a cultivation machine. It compensates for stretch and wear in the drive element, preventing slip and ensuring consistent power transmission to the implement. A worn tensioner allows the drive to slacken, which can cause erratic operation or damage to the driven components. This original part is machined to the same pivot geometry and spring rate as the factory assembly, so it maintains the correct preload without requiring shimming or bracket modification.