Not sure of your model but you can find the Craftsman web site and get a diagram.Most of the decks I have come in contact with will use an idler type pully somewhere in the belt route that will move in or out etc. to take up slack in belt.Sometimes a spring does the job by holding a pulley against the belt so check to make sure all the pulleys are ok and all the springs are ok.Hope this helps.Rick
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Not sure of your model but you can find the Craftsman web site and get a diagram.Most of the decks I have come in contact with will use an idler type pully somewhere in the belt route that will move in or out etc. to take up slack in belt.Sometimes a spring does the job by holding a pulley against the belt so check to make sure all the pulleys are ok and all the springs are ok.Hope this helps.Rick