9280 Versatile intermittent rattle - The Combine Forum
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post #1 of 12 (permalink) Old 05-21-2019, 03:41 AM Thread Starter
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9280 Versatile intermittent rattle

9280 Ford Versatile, L10 Cummins, 12 speed standard manual syncro transmission.

I have a rattle noise intermittently at idle, coming from the area of the driveshaft between the engine and transmission.

It comes and goes as it pleases, but always disappears when you raise the engine even slightly above idle.

Driveshaft, universal, rubber drive coupling etc all seem good and tight. Unable to find anything loose in the area.

Check out these videos, the picture doesn't tell you much but hopefully you can hear what I am talking about.

https://youtu.be/POB6ClqeZFM

https://youtu.be/IxzAjedMcAU

Any ideas?

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post #2 of 12 (permalink) Old 05-21-2019, 08:31 AM
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I'm interested to hear what the problem is if any because our 9280 does the exact same thing and has since we've owned it (4 years or so). Like you said it's only at an idle, anything above that and it disappears, I've never worried too much about it I guess.

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post #3 of 12 (permalink) Old 05-21-2019, 09:02 AM
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Iíll bet the rattle doesnít occur with cold oil, only warm or hot?
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post #4 of 12 (permalink) Old 05-21-2019, 09:07 AM
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Broken spring in the clutch?

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post #5 of 12 (permalink) Old 05-22-2019, 04:09 AM Thread Starter
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I’ll bet the rattle doesn’t occur with cold oil, only warm or hot?
Yes, only starts once it's warmed up. You've seen the same thing before?
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post #6 of 12 (permalink) Old 05-22-2019, 04:13 AM Thread Starter
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Broken spring in the clutch?
Don't know, sounds a bit like that type of thing, but do you know what the clutch is like on these? It's not a Spicer truck type clutch. It's in the transmission itself. I believe it is a multi plate wet clutch? More like a clutch pack? But I don't really know.
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post #7 of 12 (permalink) Old 05-22-2019, 09:40 AM
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Yes, only starts once it's warmed up. You've seen the same thing before?
Yes.
My SWAG (Scientific Wild Assed Guess) is when the oil is cold and viscosity higher there is enough drag on all the gears and bearings to never unload the gears.
When the oil is hotter and thinner the transmission turns much easier, due to resonate frequencies generated by all the turning parts including the engine there is rapidly loading and unloading of the gears creates the rattle you hear.
Itís just annoying, no functional adversity, in my tractors case just increasing idle speed 50 rpm would make it go away.
Oh, and my tractors transmission was green.
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Originally Posted by Willyboy View Post
I'm interested to hear what the problem is if any because our 9280 does the exact same thing and has since we've owned it (4 years or so). Like you said it's only at an idle, anything above that and it disappears, I've never worried too much about it I guess.
Same thing and your 4 year experience says it is not to be feared.
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post #8 of 12 (permalink) Old 05-26-2019, 05:32 AM Thread Starter
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My SWAG (Scientific Wild Assed Guess) is when the oil is cold and viscosity higher there is enough drag on all the gears and bearings to never unload the gears.
When the oil is hotter and thinner the transmission turns much easier, due to resonate frequencies generated by all the turning parts including the engine there is rapidly loading and unloading of the gears creates the rattle you hear.
It’s just annoying, no functional adversity, in my tractors case just increasing idle speed 50 rpm would make it go away.
Oh, and my tractors transmission was green.
Sounds possible. Are you talking John Deere or Steiger? Or Fendt? Deutz maybe? I had a Steiger with no rattles to be heard at all.

I have spent a fair bit of time in a 9682 Versatile, with no rattle to be heard. This would be closer to my 9280 transmission than anything green, and yet didn't rattle.
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post #9 of 12 (permalink) Old 05-26-2019, 05:33 AM Thread Starter
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Originally Posted by kevlar View Post
Broken spring in the clutch?
Don't know, sounds a bit like that type of thing, but do you know what the clutch is like on these? It's not a Spicer truck type clutch. It's in the transmission itself. I believe it is a multi plate wet clutch? More like a clutch pack? But I don't really know.
Anyone else know what type of clutch these have in the front of the transmission?
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post #10 of 12 (permalink) Old 05-26-2019, 06:16 AM
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Check the cab mounts.

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