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Re: 21.0HP 46 Mower Lawn Tractor Model 914.28852. The...
Rather than try to repair it or look into it, call the dealer or take it back to him as you will invalidate your warranty if you do anything to the unit, and that is not worth it. Let the dealer worry about it.
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okay check see if brakes is on the mower, not the tractor but the blades of the mower deck if not then take belt off of the new mandrel side and try turning blade by hand. should turn freely if not mandrel is bad but unlikely. sounds like you changed wrong side mandrel I presume you have 2 blades and mandrels. or when you installed it back on. the belt may be bound up between a guide and pulley just kind of look things over before a tear apart. and then do your tear apart one step at a time then check blade to see if it turns does not seem serious you may have put belt on wrong, I have done it my self. hope this helps major note do not do this with engine running cut you hand off in a flash.
Exsessive vibration is normally attributable to the mower deck. If the vibration is occurring while the blades are engaged and cutting this would indicate a need for further investigation. Check the blades for damage or uneven ware. If the blades are new or appear in good shape check the mandrals and shafts to ensure they are not Brocken or bent. You can get mandrel assembly's for around $60.00 online and replace all you need in one go.
Sounds to me like you bent a spindle. Turn the mower off and get under it and see if you can spin the blades. The blades whould spin and not be wobbly. If either one of the blades are wobbly then you'll need to replace the spindle.
Also check to make the blade belt hasn't come off or is not destroyed.
Oh boy!!! Welcome to the craftsman worst design of their mower decks CHEAP!!!!! I had to replace my mandrel on the right side, side where the grass shoots out several times!! Cheap aluminum casting ****, one or more of your ears on the mandrel probably snapped, if you have an air wrench they are not too bad to replace, the screws that go into the mandrel are self threading and is easier to work on with air wrench but can be done with socket set, hope this helps!!!! good luck!
with tractor off and key in pocket check blade for straightness if straight then check by moving it up down if loose check retaining nut if nut tight then possible mandrel bearing burnt or shaft bent also check the mandrels are bolted correctly to deck lastly but least likely is a bent deck
It sounds like your blade is hitting the ground when you are mowing.If you have high spots in your yard the blade will cut into the ground and the mounts on the mandrel will break. Make sure the mower rake adjustment is set correctly,the mower blade should be level or a maximum of 1/4 inch lower in the front.This adjustment is done with the adjuster bolt that runs from the front of the mower to the frame under the muffler, it may have one or two rods connecting the mower at this point. Also make sure the wheels are set down far enough so they can prevent the deck from scalping,they have five different mount holes,if they are up in the highest they will not do anything.Unfortunately these mower mandrels will not take a lot of punishment and they can break when the blades contact anything like dirt or tree roots. Your ultimate action may be just to mow the grass a little higher to keep from scalping. Hope this helps.
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