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how can i tighten my mower belt craftsman ys 4500

mower belt on craftsman ys 4500 model 917.276680 want tighten up enough to stay on an vibrates

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Craftsman , Lawn Mowers
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Manage My Life
Hi, You should begin by removing the deck from the tractor.Remove the belts and the mandrel guards from the deck.Block the blade with a strong piece of wood so it can't turn and remove the nut on the mandrel pulley. This is difficult to do without an impact driver. Don't hold the blade with your hand you might get cut. Use an impact driver to remove this nut and the blade bolt if possible. Turn the deck over and use the wood to block the blade and remove the bolt holding the blade to the mandrel shaft and remove the blade.You have to remove the jack shaft from the mandrel to drive the bearings out of the mandrel housing. Put the nut on the threads of the mandrel and drive the mandrel shaft out the bottom of the mandrel housing. You can drive the bearings out with a screwdriver. The lower bearing will usually come out of the housing when you drive the shaft out. I attached the link below. Hope this helps!
by Manage My Life
June 29th, 2010
Answered in 7 minutes
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Manage My Life
Based on your question I presume that you are talking about the mower drive belt and not the motion drive belt. If that is the case there is a belt keeper that goes around the engine pulley (item 9) on the engine diagram at

Sears Parts Direct

. Be sure the belt keeper is close enough to keep the belt from falling off and NOT rubbing against the pulley. As far as the vibration goes that would indicate the belt is worn a needs to be replaced. The part number for the belt is 197253 for $32.99 and it is available at

Sears Parts Direct

.

I hope this helps.

If I can be of further assistance please feel free to submit any questions you have along with the specifics.

Thanks for using Manage My Life.
by Manage My Life
July 2nd, 2010
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