9570sts vibration - The Combine Forum
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post #1 of 4 (permalink) Old 10-09-2019, 02:44 PM Thread Starter
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9570sts vibration

I replaced a bent primary countershaft in this 9570. Got it back together and still have a vibration. Pulled shaft and took it to a machine shop and it is out of round .002” which is well within spec. Gearbox splines are fine. New clutch hub on electric clutch.
Now here’s where it gets strange. Customer said when he get the grain tank 1/4 full or fuller the vibration is gone. He empties the tank and it comes back. I told him to check the front grain tank legs and the frame under the primary gear case for cracks. Other than those two things I’m lost.

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post #2 of 4 (permalink) Old 10-09-2019, 06:52 PM
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I would start by removing belts to narrow down the vibration. Helps to know where it is coming from for sure. Put rotor in neutral to make it is not rotor, ect..

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post #3 of 4 (permalink) Old 10-10-2019, 12:15 AM
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Check grain tank fill auger/ bubble up auger. When they get wore they van het way out of balance. It goes away when grain gets around it and dampens the vibration
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post #4 of 4 (permalink) Old 10-10-2019, 12:04 PM Thread Starter
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Will have him try letting the auger down and running it. Never thought of that.
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