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Stuck shear bolt

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Jim (MD)

03-08-2000 12:53:14




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I bent up a plow shear pin bad enough so I can't knock it out, but not so bad that it sheared. I hacksawed off the head, but it won't punch out the other way either.

What should I try next? A little heat?




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TomH

03-12-2000 07:46:24




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 Re: Stuck shear bolt in reply to Jim (MD), 03-08-2000 12:53:14  
As the other posts said, drilling it might be an option. Do you remember what grade bolt it was? Usually the shear bolts are grade 5, which might be hard to drill. See if you can get a carbide bit. Make sure you replace it with the same type bolt.



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MrG:???

03-13-2000 07:12:09




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 Re: Re: Stuck shear bolt in reply to TomH, 03-12-2000 07:46:24  
Tom, are you 100% sure on that grade 5 thing? Dad always used softer bolts as shears...He said he wanted the bolt the break, NOT the equipment. G



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Ninh Hoa

03-09-2000 11:45:48




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 Re: Stuck shear bolt in reply to Jim (MD), 03-08-2000 12:53:14  
Not sure what a shear bolt on a plow does, unless it's on the break-back for the share beam. If is is, then it's a two-plane shear. Can you get a sawzall in there? Might have to shorten the blade to work in tight quarters. Also, you might try drilling out the bolt center to reduce the effective shear area.

Sounds like you have a partial shear now. Just enough to put a 'shoulder' on the bolt so it won't drive out. Any chance you could use it like it is and finish the shear?

Good luck.

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Jim (MD)

03-10-2000 09:50:06




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 Re: Re: Stuck shear bolt in reply to Ninh Hoa, 03-09-2000 11:45:48  
Thanks for the advice. Although there's not enough room to fit in the sawzall (that was my first hope, too), I'll try your other ideas.

I wasn't specific enough in calling the implement a "plow". It's really a combination subsoiler/middlebuster from Central Tractor. The different shanks bolt into a frame using shear bolts, just in case you hit a rock (or in my case, a locust root) and the draft control can't take care of it.

I could keep using it as-is, but I need to use the middlebuster now!

Thanks again!

Jim

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Theman

03-10-2000 05:35:23




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 Re: Re: Stuck shear bolt in reply to Ninh Hoa, 03-09-2000 11:45:48  
Good answer. To add a variation on the drilling idea, just drill part way through making sure the hole depth is past the partly sheared area. Run a punch down the hole and drive it the rest of the way out. This, in effect, pulls the pin through the necked down area and the hole, and if large enough, will give the metal a place to go. It will also prevent swaging the end of the pin you're trying to get out.

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Jim (MD)

03-10-2000 09:51:20




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 Re: Re: Re: Stuck shear bolt in reply to Theman, 03-10-2000 05:35:23  
Good advice. I'll take it. Thanks!



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