Craftsman YT3000 ride on mower

[Catchram12]

Hello all,while mowing the other day the transmission pully fell off.
I picked up a 7/16-20x4 in bolt to put it back on but that does not seem to be the size.
Would you know the size of the bolt. I am now wondering if the th part where the thread goes in is cut. Please see the images.
Thanks,
Ram

 

[Rivets]

That should be the size. More than likely the threads were damaged as the old bolt loosened and fell out. Carefully restoring the threads with a tap is probably needed.

 

[Catchram12]

Thanks, I bought a another standard bolt(vs matrix), that seems to go few threads but stops after using 3 threads leaving half an inch of bolt outside. Further tightening turns the pully. Let me try restoring the thread.

 

[StarTech]

Just make you got the right length too. IE they do get put in the wrong bins at you local hardware stores.

PN 501606501
7/16-20 x 4 Grade 5 and apply blue Loctite. OEM part comes with Loctite already applied.
And don't forget to install the 7/16" lock washer.
Torque to 55 ft-lbs.

 

[Catchram12]

Yes the length seems to be correct. I ordered OEM on searsdirect, same part number as you have mentioned but they have not shipped it yet(screen print).
Do you have a recommendation of a local store where I can get the exact bolt?
Thanks
Ram

 

[Rivets]

Grade 5 bolts will have 3 radial lines on the bolt head. Grade 8 bolts will have 6 radial lines on the bolt head. Can be purchased at any hardware store, Menards, Lowe’s, Home Depot, etc.

 

[StarTech]

As Rivets said just about any hardware store have them.

 

[Catchram12]

Thanks

 

[slomo]

Get the same grade as came in it. Don't go caveman and get all grade 8. If they break off, you will have hell getting them out.

Grade 5 is plenty on a lawn mower.

 

[Catchram12]

I don’t know what it came with, I will go with grade 5, thanks