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| Combine seems to be shaking/vibrating/bumping around a lot more than it should. I put on new chopper knives and it will be getting balanced, but I’m not sure that’s the issue. I’ve put the rotor in neutral and ran the combine and didn’t make any difference, same story with the feed accelerator. Nothing is missing, and all bearings turn freely and feel tight. Any clues on what else it might be or where to look? The John Deere techs didn’t find anything obvious either |
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se montana | Shaker arms , broken or bolts out of them...
Or the side plate to sieve or chaffer broken |
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Southern Pa. | You can always run it without the chopper running for testing purposes as well.
ETA.
Feederhouse on or off make any difference??
Edited by JD 9400 9/28/2023 13:47
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NE Indiana | Could be stuff stuck inside the discharge beater. Also make sure the bubble up auger isn't bouncing around up there. While harvesting wheat this summer I noticed our bubble auger was bouncing around like crazy when empty. Never really thought the combine had much shake to it but after changing that auger its way smoother. Everything looked fine on it, but they are balanced with a lot of heavy weights and I'm guessing we just lost one at some point. |
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56676 | Dust/chaff piled up inside of pulleys? Probably where it's hardest to see. |
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Southern Pa. | kgbarnett22 - 9/28/2023 14:44
Could be stuff stuck inside the discharge beater. Also make sure the bubble up auger isn't bouncing around up there. While harvesting wheat this summer I noticed our bubble auger was bouncing around like crazy when empty. Never really thought the combine had much shake to it but after changing that auger its way smoother. Everything looked fine on it, but they are balanced with a lot of heavy weights and I'm guessing we just lost one at some point.
You can run it without the discharge beater running for testing purposes as well. |
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Niagara County Western NY | Had that happen once to mine, it was the chopper, I had put in a mix of new knives from Shoup and John Deere. I found the chopper was vibrating a lot. Pulled the Shoup knives and put in all John Deere knives and it resolved my issue. |
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| I checked all the shaker arms, they are all good and snug, most of them only a couple years old. |
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| I had tightened up the auger on top just a little to be sure, and it seems just fine. I’ll look in the discharge beater, what’s the best way to get at it? |
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| Ran without the feederhouse too, didn’t seem to make much difference. Whatever it is, it’s making the steering wheel/column rattle around unless I hold on firmly |
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Near-north Ontario, French River | Corn or beans? Headers check out fine? Maybe a bent cross auger? |
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| Soybeans. The header isn’t perfect by any means, but the shake/vibration is definitely still there when not running the header |
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East Central Missouri | If that is your problem, I weighed A & I knives that I put in a 9600, put them in groups of three of similar weight. I even put the lighter groups in the center of the chopper with the heaviest groups on the outer edges. Worked for me. |
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| Check out the discharge beater for sure. Always best to pop the belt off it and run combine, then you know right away your at the right spot. Blow the beater out until clean. That said it could be nervous things, could be the u-joint at the 90 degree gearbox on the primary counter shaft. Could be a belt etc.. |
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| Make sure the big nut is tight on the header drive pulley hanging off of the gearbox behind the cab. |
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Mid-Michigan | Check the drive shaft right behind the cab. |
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| What AGB said, sounds like power shaft |
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| Just checked, there is zero slop in the shaft. I’m beginning to think it’s a front rotor bearing. While harvesting today it was bad enough to shake the steering wheel in my hand |
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Kansas | We had that bearing go out once i noticed a growling noise before it went all the way out |
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Oregon | I agree with justdave, in my experience they tend to growl first. But its easy to diagnose- pull the front cover and check it for heat.
Impossible to say from here, but after you have eliminated so many things, I'm inclined to think buildup on the inside of the intake beater. A lot of those in the 70-series out here were converted to solid drums do to buildup in grass seed.
Edited by mschultz 9/28/2023 19:32
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NE ND | Yes, if it came loose the hub in the header clutch is shot as well. |
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Moreauville LA | Disengage everything, including lowering the auger in the hopper
Discharge beater belt, chopper, rotor, tine accelerator.
Check primary countershaft
Swing bearing on driveshaft
Broken cast arm on side behind clean grain elevator
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| Check for dirt in Feed accelerator, also the hub on the electric
Clutch , when you shut off separator watch how the electric clutch coasts to a stop, if it lopes the hub is bad |
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mid western ontario | If you had rotor in neutral and still felt it can't be rotor bearing.
I would bet on primary counter shaft, or gearbox. |
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illonois | Engine harmonic balancer coming apart? |
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SCIA | We had the output shaft and yoke, on the front of the main gear case get enough wear to cause vibration (2200 separator hours) . At an idle. you could see that the yoke was not spinning true. |
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| When driving down the road without the machine running it’s as smooth as can be. Could that still be the cause? |
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| Feed accelerator looks like it has a lot of dust in it. What’s the best way to clean it out? I used the air compressor and blew some out but that’s doing more stirring than getting dirt out |
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| Hey everyone,
Finally found the culprit. It was a combination of soybeans that had some green stems and the feed accelerator being packed full of debris. Cleaned it out and it settled down. Switched over to corn and it was as smooth as could be. Thanks for all the help! |
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9660 shaking/vibrating
