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Implement Alley Discussion Forum

NH 467 haybine problem

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Jim H.

09-05-2004 07:07:08




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Anyone ever had this problem? The chain that drives the lower roller keeps breaking; the idler sprockets look OK (they're only a year old), but the spring holding up the tensioner idler was elongated. Put a new spring on, with the fixed-up chain, went two go-rounds and the chain broke again, and the new spring went to parts unknown. The spring wasn't a NH replacement; it was the closest thing at the local hardware store. Everything else seems good and tight. Guess I'll fix the chain again and get a better spring. Oh yeah - I was on my last field of the season, so I just decided to keep going. The field was small and light, and the 467 cut it just fine, the top roller "rolling" the bottom one without the chain. I'm amazed at how parts can FALL OFF nh equipment and it just keeps going! Anyone else got a story like that?

- Jim H.

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CRUSADER

09-07-2004 09:04:00




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 Re: NH 467 haybine problem in reply to Jim H., 09-05-2004 07:07:08  
Hello Jim H.
Sounds like everyone is giving you great advice on what to do to correct the problem. I haven't worked on very much hay equipment since joining the military in 1985. However, while working at a New Holland Company Store, I did see a few problems arise. Since you will be want to check things over very close anyway. Please take a look at the following also. Ensure that there are no cracks in the frame where the rollers are mounted. Not saying which model, but at one time this was a problem that costed New Holland quite a large expenditure. The 467 isn't the one, but it's possible for it to crack. Also check over the bearing for the roller shafts and insure that the rollers are timed and positioned. It possible that they are not meshing and causing the chains to snap and break. Just a few thoughts I wanted to add to your thread of well thought of advice. Good luck on repairing the haybine.
Jim

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Steve from New Holland

09-07-2004 04:33:04




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 Re: NH 467 haybine problem in reply to Jim H., 09-05-2004 07:07:08  
2 things. 1- Replace the chain, not just repair it. 2- Check your roll timing. The lugs of the rolls must be centered in each other. If they rub the sides of each other, it makes the rolls turn hard. Steve



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Oliver farmer

09-05-2004 14:55:04




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 Re: NH 467 haybine problem in reply to Jim H., 09-05-2004 07:07:08  
I had a similar problem with a NH 488. Put the chain back on, (I'd try a new one if this one has been twisted or stretched much) snug it up and then look at the way the rolls fit together. On my 488 the rolls were hitting each other. Mine would shear the key that held the sprocket, and then mow fine with one roll driving the other. On the lower roll their is an adjustment so you can move the position of the sprocket relative to the roll. Hopefully yours is the same. Put the chain on, adjust the sprocket till the rolls fit together nicely, and tighten everything up.

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JMS/MN

09-05-2004 13:54:08




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 Re: NH 467 haybine problem in reply to Jim H., 09-05-2004 07:07:08  
To check a roller chain for wear- grab it with both hands, just a few links apart. Pull it and push it together to indicate how much wear is in the rollers and pins. A new one is tight. A worn one will climb on the sprocket, much the same that a new chain will not match an extremely worn sprocket. The sooner you switch a worn chain, the longer your sprocket will last.



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Don-Wi

09-05-2004 13:20:00




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 Re: NH 467 haybine problem in reply to Jim H., 09-05-2004 07:07:08  
If your chain is worn/stretched out, replace it w/ new. It'll make your life a whole lot easier. I work at a machine shop that makjes sprockets and I've seen some really worn sprockets because the chain was too sloppy.
Donovan from Wisconsin



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old

09-05-2004 12:02:19




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 Re: NH 467 haybine problem in reply to Jim H., 09-05-2004 07:07:08  
I have a 460 that did about the same thing this year. The chain and sprockets where worn out and the chain would ride up on the tooth of the sprockets and brake/bend things. I replaced the sprockets and chain and it works like a new one now. If when you lift up on the chain in the middle of the sprocket and it liftsa up say 1/4 inch you need a new chain and probably sprockets.



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