Application: Fits for John Deere: X300, X304, X310, Tractor Select Series. OEM Replacement: Replacement for M155560 Material: Made of premium steel, surface zinc plated to prevent corrosion and ensure rust resistance, wear resistance. Meeting or exceeding OE specifications. Tips: If your Deere tractor is breaking belts then you need to replace the tensioner arm ASAP. As the tractor hits 200-300 hours the tensioner arm starts to wobble and kick the deck belt off the pulleys. This will break/damage the belt. Replace the arm and then install a new belt and it should fix your issue. .
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