Question about Craftsman 21 HP 42 in. Zero Turn Tractor Mower - CA Model

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We can't seem to keep the top bearing in the front spind.le from going bad. We have changed it several times but it gets destroyed after a few mowings

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  • rdmcadams Apr 29, 2010

    We have put 2 new shafts in and have another on order. When the bearing is destroyed it scars the shaft. Should we check runout when the spindle is installed? If so were do we check it? What should the tolerance be? What should the tolerance be on the shaft alone?

    Mike

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OK, the reason your bearings are failing, is because the shaft is out of "True" and also maybe the End Seals, are allowing crud and stuff to enter the bearing thus accelerate wear. But I am sure the most important thing is your bent shaft, it may only be a little out of "True" but thats all thats needed. Also it maybe Out of "Balance" as well, or instead of. Thats the area you must attend to. Also are you packing the bearings correctly with grease etc, before buttoning it all up? re any seals intact and in place.? Are you sure they are in right way round? Also they are the exact bearings you need? right? You are using a high quality bearing?

Posted on Apr 29, 2010

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