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Implement Alley Discussion Forum

NH Baler Shear Bolt Bushing

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Edd in Kentucky

06-20-2006 16:01:24




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MY NH 276 baler has a bushing in the fly wheel that the shear bolt goes thru. I am told that if this bushing is worn or egg shaped it can be the cause of frequent shearing of bolts. (I am using long shoulder #5 bolts). I have purchased the new bushing but I am looking for an easy way to push out the old bushing and drive in the new one without tearing up something else or having to remove the whole flywheel and put it an a press. Any suggestions or directions are welcome. Am I on the right track to reduce the number of shear bolts I break? Thanks

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Edd in Kentucky

06-21-2006 11:04:22




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 Re: NH Baler Shear Bolt Bushing in reply to Edd in Kentucky, 06-20-2006 16:01:24  
Thanks for the info. We did replace the main brass bushing in the flywheel hub about 2 years ago so I hope it is still good.How do I check it?

However, the little bushing in the flywheel that the shear bolt goes through wears a ring around the edge of the new shear bolt in no time. Then the bolts break for no apparent reason. Just seems like their time is up.

I've tried driving the little bushing out, but I can't get straight at it because of the big PTO slip clutch in the way. Putting the new bushing in the freezer sounds like a good idea....but how do you suggest I get the old one out?

Thanks Edd

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Steve from New Holland

06-21-2006 10:02:35




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 Re: NH Baler Shear Bolt Bushing in reply to Edd in Kentucky, 06-20-2006 16:01:24  
Whomever replyed to simply drive out the old one and pound in the new one was correct. However, I would be willing to bet that the center flywheel bushing is worn and that will cause more trouble than the little bushing. Steve



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mn.Chuck

06-20-2006 19:54:45




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 Re: NH Baler Shear Bolt Bushing in reply to Edd in Kentucky, 06-20-2006 16:01:24  
I am confused which bushing. You mentioned Edd,
the bushing in the flywheel that the shear bolt goes thru. I think some of the reply is thinking
of the center flywheel bushing. This center bush
is very important. The shear bolt bushing can
also wear. For what they cost I would put both in
and as a former dealer I would recommend getting
a stock of shear pins from the dealer. You will
save a lot of time and trouble if you do these.

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Cliff Neubauer

06-20-2006 16:54:31




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 Re: NH Baler Shear Bolt Bushing in reply to Edd in Kentucky, 06-20-2006 16:01:24  
We replaced the one on our 310 a few years ago. I don't think getting the old one out was very hard and I think we put the new one in the freezer overnight to shrink it a little bit before putting it back in. Our 310 got to the point where it would shear the bolt for no reason, dad didn't think the worn bushing was the problem but it took care of the shear bolts breaking.



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RickB

06-20-2006 16:13:56




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 Re: NH Baler Shear Bolt Bushing in reply to Edd in Kentucky, 06-20-2006 16:01:24  
If I remember, the bushing has a flange on the back side. Just drive the old bushing out with a suitable punch and drive the new one in with a soft punch of the proper diameter. NH is pretty careful not to mark the heads of their shearbolts with common hardness markings. You may well eliminate excessive shearbolt failure by simply coughing up the 30 or 40 cents per piece for genuine NH shearbolts. OEM shearbolts is never a bad idea unless it is possible to positively identify and match dimensions and hardness.

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