Yes, there is an idler arm with a pulley that presses either inward or outward against the belt to tension it. In some JD mowers, the arm is tensioned by pulling on a long metal rod that latches near the edge of the mower deck, but without the model number I can't be more precise about that. Just look for that extra pulley and arm it's mounted on -- you'll see a tension spring, and you should also see a way to pull the arm away from the spring to place it under tension. Good luck!
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hi can you give me model numbers off the rider mower and the deck size in inches and its color ( especially if its stx 38 ) and wether side delivery or rear catching or mulching type deck should be numbers on a white sticker on the side of tractor somwhere or under the seat example molstx38##### i will try help you with diagram and or website for parts and diagram that you can access with own user id and p/w cheers let me know numbers and model etc
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