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Blade will not Stay Tight

rmmagow's Avatar

Join Date: Oct 2005
Posts: 77

09-02-09, 06:07 PM   #1  
Blade will not Stay Tight

Craftsman 917.258570. The blades on this 42 inch lawn tractor refuse to stay tight and won't tighten up real snug in the first place. The big washer lock washer and bolt that hold the blade, is the big washer supposed to be dished to press more firmly on the blade? I am using loc-tite on the bolts, but I think the big washer might be NG. Advice??
Thanks Much.

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geogrubb's Avatar

Join Date: Jun 2006
Posts: 2,333

09-02-09, 07:06 PM   #2  
I think the big washer is what is called a bell washer and is actually a type of lockwasher, the object being it will keep pressure on the bolt to keep it from turning, if it has flattened then it could be the problem. Have a good one. Geo

31YTech's Avatar

Join Date: Feb 2008
Posts: 1,263

09-02-09, 07:39 PM   #3  
Make sure the star on the bottom of the shaft is not worn/rounded off, If so it will let the blade move which could loosen the screw.

cheese's Avatar
Forum Topic Moderator

Join Date: Jul 2001
Posts: 16,567

09-02-09, 11:45 PM   #4  
I agree... i think your star locking device is gone, from not putting the blades on properly.

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