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My lawnflite 703 blade drive belt keeps jumping its pulley. It looks like 2 pulleys don't line up properly. There appears to be 2 pulleys, one of which has a tension spring on it and the belt goes rould the pulley that drives teh blade and then onto teh tension pulley. It is these 2 pulleys that seem to not line up causing the belt to ride off and jam.

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  • alanincroft May 03, 2010

    The 2 pulleys that I refer to are both on the deck. One is attached to 1 of the blades and the tension pulley is right beside it. logically they should be level with each other but the tension pulley looks too high. The engine pulley is right at the front and the link between this and the tension pulley appears to be fine.

  • alanincroft May 03, 2010

    both pulleys are on the deck, not as suggested in the answer I received. 1 pulley is attached directly to one of the blades and the other appears to be a tensioner. They are about 10 mm out of alighnment. The link form the tension pulley to teh engine seems fine

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Hello

Is the belt new or used? Replace it if its old.How are the blades?if one is out of balance it will cause the deck to shake and the belt to jump off.

The deck also needs to be level,this is done with rods and jam nuts located under the mower above the deck.There should also be a pin near the engine pulley that keeps the belt in the groove of the pulley,make sure its there and not bent.

Posted on May 03, 2010

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  • Master
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The pulleys will not line up since one is connected to the engine and the other is connected to the "deck" which goes up and down.

Around the pulley connected to the deck there should be a piece of metal that helps keep the belt from slipping off, if it is bent too far from the pulley, bend it back in. Also I would replace the spring with a fresh new one to keep a good tension on the belt.

Posted on May 03, 2010

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UNITS AFFECTED: Model Number(s): Serial Number(s):
38620 240000001-240999999
38621 (Int'l.) 240000001-240999999
38632 240000001-240999999
38635 (Int'l.) 240000001-240999999
38642 240000001-240999999
38645 (Int'l.) 240000001-240999999
38652 240000001-240999999
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2. Remove the auger brake assembly.
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