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8N or NAA Roll Over

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Patrick/N-Tiques/OR

04-15-2002 20:50:04

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Does anyone know the tilt angle required to roll an 8N or an NAA? What I am looking for is the maximum grade of a hill one can drive across safely with out rolling.

I have a hillside I want to grade a terrace on and, being the ever cautious operator, I do not want to get onto the side of a hill and roll.

I have both 8Ns and NAAs. So if you know the data for either, that would be great!

Many Thanks in Advance!
Patrick
www.n-tiques.com

N-Tiques

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Upper Michigan

04-19-2002 18:42:28

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Re: 8N or NAA Roll Over in reply to Patrick/N-Tiques/OR, 04-15-2002 20:50:04

Hi Pat. I use a 9N around camp for logging, building & maintaining roads, snow plowing, building food plots, mowing etc. generally everything a tractor can do,it does on my property. However, by policy on hillsides is, if I am concerned about the steepness of the hill, I don't work on it. If necessary, and I have done this in the past, hire a dozer to do the work and get the hill in condition so that I can work it with the tractor. The main thing is to always use your head before using your tractor. To repeat, if in doubt, don't do it. You will live longer. You are receiving some good advise from the others, pay attention to it and use it as if your life depends upon it, because it does. Good Luck and happy tractoring. Ron

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Rusty 2N

04-16-2002 19:53:24

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Re: 8N or NAA Roll Over in reply to Patrick/N-Tiques/OR, 04-15-2002 20:50:04

When I had them I run duals on the rear to do any hillside work. Great info in those sites. Be careful!!!

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2fordsmike...It will slide before rolling

04-16-2002 11:46:22

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Re: 8N or NAA Roll Over in reply to Patrick/N-Tiques/OR, 04-15-2002 20:50:04

If you widen the wheels to their widest setting, I think you will almost slide down a slope before it becomes steep enough to flip a Ford tractor. This is particularly true if you are mowing or disking and these implements are "on the gound" which lowers the center of gravity. The great danger comes on a moderately steep slope where you drop one wheel in a little gulley. Be careful. Mike

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Evil Steve

04-16-2002 07:52:33

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Re: 8N or NAA Roll Over in reply to Patrick/N-Tiques/OR, 04-15-2002 20:50:04

There are a few sites posted by various ag organizations that address this issue.

Two years ago a friend of mine was using his tractor for roadside grading. Not a big slope and he didn't roll over. What DID happen is that he hit a bump and fell off the tractor. "Fortunately" he fell far enough that the rear tire only ran over his legs. So regardless of roll over, remember that you can be hurt or killed in other ways. Be careful.

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Barnstormer

04-16-2002 06:56:22

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Re: 8N or NAA Roll Over in reply to Patrick/N-Tiques/OR, 04-15-2002 20:50:04

I do NOT have any statistics or data other than my own experiences.
I mow my lawn with a '52 8N and a Woods 6' rear mount mower. Part of my mowing includes 400' of road ditch. The most sever angle is with one side on the bank and one in the bottom of the ditch. The ditch at it deepest is 2 feet. My wheel spacing is "standard" width. That is, the original "hat" rim is outside of the wheel dish.
I have never felt threatened at this angle going in first or second gear.
I once saw an NAA with one side in the bottom of a three foot deep ditch. To this day, I don't know why it did not roll over other than it wasn't his day to die.
On level ground try jacking one side of your tractor up at 6" intervals until you feel it is not safe or you are not comfortable. Personally, I won't go beyond the 2 feet. HTH

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04-16-2002 05:42:01

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Re: 8N or NAA Roll Over in reply to Patrick/N-Tiques/OR, 04-15-2002 20:50:04

My brother has an aversion to rolling machinery on any slope, so his tolerance factor is less than mine, but here's a page that you might find helpful.....

Roll-over Index

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Patrick/N-Tiques/OR

04-16-2002 12:49:58

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Re: Re: 8N or NAA Roll Over in reply to bg, 04-16-2002 05:42:01

Here is another link that my wife found that has some good information.

Tractor Overturn Hazards

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Patrick/N-Tiques/OR

04-16-2002 09:32:19

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Re: Re: 8N or NAA Roll Over in reply to bg, 04-16-2002 05:42:01

This looks like good data. I am having a little trouble understanding it, though.
My interpretation of this experiment is that the tractor was rolling down hill in neutral and then made a turn at the bottom of the hill. The force of gravity builds speed and adds to the gravitational force. This combined force is realized once the turn is initiated. The downward force (gravity) pulls the tractor over once the center of gravity is neutralized by a change in vector.... literally... like a centrifuge.

So, the question is, if you do not have the downward force applied by rolling downhill and are moving at a constant speed (could be 0 mph!) and the vector is perpendicular to the force of gravity, what maximum tilt angle could it maintain without rollover. Can this data point be extracted from the experiment?

I like Dell's comment the best.... jack up one side the tractor until I feel like I am sliding out of my seat!

Thanks for the data!
Patrick

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thats the one . . . Dell (WA)

04-16-2002 08:28:45

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Re: Re: 8N or NAA Roll Over in reply to bg, 04-16-2002 05:42:01

NOTE: the Ford was on a 23 slope, almost twice as steep as the 14 slope of the John Deere..... ....thanks Bob..... ..Dell, who had to change skivvies after that

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Dell (WA)

04-15-2002 22:42:51

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Re: 8N or NAA Roll Over in reply to Patrick/N-Tiques/OR, 04-15-2002 20:50:04

Pat..... ..if you're sliding sidewize out of your bucket seat, your too close for comfort. You know those crazy offroad jeep guys have tilt meters on their dashboards to keep them from rolling sidewize. Best widen out your wheels for more stability. Eazy enough to do.

I lost my bookmark for the Colorado State University at Ft Collins, (used to call 'em the Aggies). The Ag department several years ago was posting pictures of remote controll tractor rollovers. It was part of a farm safety thing trying to prove ROPS work and designing retrofits for old tractors. They kept breaking the rear axle trumpets.

I don't remember the specs right now but the rowcrop tricycle John Deere's were not as stable as the ol'redbellys were. But of course we know that. It took the ivory tower accadamics 50 years to figger that out. (grin)..... ..... ..Dell

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Mike

04-15-2002 21:42:19

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Re: 8N or NAA Roll Over in reply to Patrick/N-Tiques/OR, 04-15-2002 20:50:04

Pat,
I've never come across any data on how steep a hill you can cross, I know if I was worried I'd spread the tires to the max. That should pretty much put your COG low enough that you wouldn't have to worry about flipping, just sliding sideways. Spread 'em out and good luck.
Mike

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