Chopper belt - The Combine Forum
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post #1 of 7 (permalink) Old 07-11-2019, 10:50 AM Thread Starter
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Chopper belt

What causes the chopper belt to go all over the place and mark up the side of the combine? In 10 years I have not seen that on this combine (6620). Thanks

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post #2 of 7 (permalink) Old 07-11-2019, 11:18 AM
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Bad bearing in a sheave or idler? Or in the tensioner pivot itself?

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post #3 of 7 (permalink) Old 07-11-2019, 12:12 PM
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Out of balance chopper, defective belt, or as above. Not a big problem, I think the T2 combines actually had a "guide" bolted to the front of the walker housing to keep the belt from hitting the side...or maybe I just made one for my early 7720, can't remember.
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post #4 of 7 (permalink) Old 07-12-2019, 10:44 AM Thread Starter
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Mine has the guide. It has a hole worn through it. JD doesn't make it anymore. I think I will make a new one. I will check the bearings. Could be the chopper out of balance, last fall we turned the knives around that may have put it out of balance. Thank you
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post #5 of 7 (permalink) Old 07-12-2019, 03:44 PM
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I had that problem on a chopper on my massey. The belt was dancing around like a japanese girl with those silk scarfs on a stick act. As the combine moved up and down the belt would dance around slowly oscillating i swear coming off the idlers. It was like a cirque du soleil act. Finally it broke, the belt was a cheap chinese POS, and had almost no weave cores, it was too rubbery if that is a thing, and hand no strength in tension, might as well used a rubber band. Got a proper belt problem solved.
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post #6 of 7 (permalink) Old 07-12-2019, 03:50 PM
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Could just be an old belt, or a cheap one, they lose their stiffness over time and get all floppy. No I'm not talking about you old men either!!
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post #7 of 7 (permalink) Old 07-16-2019, 11:48 AM
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Be thankful you're just hitting the combine. An idler puked on mine, and now I need a fuel tank.

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